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Proximity Capacitive Touch Sensor Controller

MPR121
  • This page contains information on a product that is no longer manufactured (discontinued). Specifications and information herein are available for historical reference only.

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The MPR121 is the second generation sensor controller after the release of the MPR03x series devices. The MPR121 features:

  • Increased internal intelligence in addition to a second generation capacitance detection engine
  • An increased electrode count, hardware configurable I2C address, expanded filtering system with debounce and completely independent electrodes with built in auto configuration
  • A 13th simulated electrode that represents the simultaneous charging of all the electrodes connected together to allow for increased proximity detection in a touch panel or touch screen array

Product Details

N true 0 PSPMPR121en 22 Application Note Application Note t789 10 Brochure Brochure t518 2 Data Sheet Data Sheet t520 2 Fact Sheet Fact Sheet t523 4 Product Change Notice Product Change Notice t526 1 Selector Guide Selector Guide t528 1 User Guide User Guide t792 1 White Paper White Paper t530 1 en_US en_US en Data Sheet Data Sheet 2 1 4 English The MPR121 is the second generation sensor controller following the initial release of the MPR03x series of devices. The MPR121 features an increased internal intelligence plus Our second generation capacitance detection engine. Some major enhancements include an increased electrode count, a hardware configurable I2C address, an expanded filtering system with debounce, and completely independent electrodes with built-in autoconfiguration. 1252432663304730020713 PSP 289.9 KB None None documents None 1252432663304730020713 /docs/en/data-sheet/MPR121.pdf 289918 /docs/en/data-sheet/MPR121.pdf MPR121 documents N N 2009-09-08 MPR121, Proximity Capacitive Touch Sensor Controller - Data Sheet /docs/en/data-sheet/MPR121.pdf /docs/en/data-sheet/MPR121.pdf Data Sheet N 980000996212993340 2022-12-07 pdf N en Feb 7, 2013 980000996212993340 Data Sheet Y N MPR121, Proximity Capacitive Touch Sensor Controller - Data Sheet 2 C English Schematics and Board Layouts for MPR121 and MPR121 Daughter Board 1266526034924713583166 PSP 979.8 KB None None documents None 1266526034924713583166 /docs/en/data-sheet/KITMRP121EVM_SCH.pdf 979779 /docs/en/data-sheet/KITMRP121EVM_SCH.pdf KITMPR121EVM_SCH documents N 2010-02-18 KITMPR121EVM_SCH /docs/en/data-sheet/KITMRP121EVM_SCH.pdf /docs/en/data-sheet/KITMRP121EVM_SCH.pdf Data Sheet N 980000996212993340 2022-12-07 pdf en Jul 30, 2009 980000996212993340 Data Sheet Y N KITMPR121EVM_SCH Application Note Application Note 10 3 2 English The MPR121 uses an I2C Serial Interface. The I2C protocol implementation and the specifics of communicating with the Touch Sensor Controller are detailed in this application note. 1252434339112725629482 PSP 118.5 KB None None documents None 1252434339112725629482 /docs/en/application-note/AN3895.pdf 118533 /docs/en/application-note/AN3895.pdf AN3895 documents N N 2009-09-08 MPR121 Serial Communication - Application Notes /docs/en/application-note/AN3895.pdf /docs/en/application-note/AN3895.pdf Application Note N 645036621402383989 2022-12-07 pdf N en Feb 7, 2013 645036621402383989 Application Note Y N MPR121 Serial Communication - Application Notes 4 0 English This application note shows how to design a touch panel around the MPR121 capacitive touch sensor controller, using minimal hardware and software. 1354727783875731648424 PSP 244.7 KB None None documents None 1354727783875731648424 /docs/en/application-note/AN4600.pdf 244704 /docs/en/application-note/AN4600.pdf AN4600 documents N N 2012-12-05 Designing a Touch Panel using the Xtrinsic MPR121 Capacitive Touch Sensor Controller - Application Note /docs/en/application-note/AN4600.pdf /docs/en/application-note/AN4600.pdf Application Note N 645036621402383989 2022-12-07 pdf N en Dec 5, 2012 645036621402383989 Application Note N N Designing a Touch Panel using the Xtrinsic MPR121 Capacitive Touch Sensor Controller - Application Note 5 1 English The capacitance sensing front end of the MPR121 produces data at extremely high rates, which significantly improves the capabilities of a filtering system. The capacitance engine described in AN3889 act on a 1 ms - 32 ms per sample data rate. THis application note will discuss the first and second level filters in the MPR121 and how they impact timing and power consumption. 1252433346324725263253 PSP 164.9 KB None None documents None 1252433346324725263253 /docs/en/application-note/AN3890.pdf 164881 /docs/en/application-note/AN3890.pdf AN3890 documents N 2009-09-08 MPR121 Capacitance Sensing - Filtering and Timing /docs/en/application-note/AN3890.pdf /docs/en/application-note/AN3890.pdf Application Note N 645036621402383989 2022-12-07 pdf en Mar 26, 2010 645036621402383989 Application Note Y N MPR121 Capacitance Sensing - Filtering and Timing 6 0 English MPR121 is a feature rich, second generation touch sensor controller after NXP&#8217;s initial release of the MPR03x series device. Like MPR03x, MPR121 has a unique feature that all the electrode inputs can be internally connected together so that all the surface touch sensing area on the inputs are &#8220;summed&#8221; together to act as a single large electrode pad. This can effectively increase the total area of the sensing conductor for non-contact near proximity detection for hand approaching. 1269643987306732553198 PSP 174.1 KB None None documents None 1269643987306732553198 /docs/en/application-note/AN3893.pdf 174141 /docs/en/application-note/AN3893.pdf AN3893 documents N 2010-03-26 MPR121 Proximity Detection /docs/en/application-note/AN3893.pdf /docs/en/application-note/AN3893.pdf Application Note N 645036621402383989 2022-12-07 pdf en Mar 26, 2010 645036621402383989 Application Note N N MPR121 Proximity Detection 7 1 English Touch acquisition takes a few different parts of the system in order to detect touch. The baseline filter and touch detection are tightly coupled. The purpose of the baseline filter is to &#8220;filter out touches&#8221; resulting in a system that is similar to a long term average but also takes into account that one specific signature. A touch must have different properties than noise and environmental change with respect to the filter response. This is accomplished through four register types that operate 1252433461480711798231 PSP 302.5 KB None None documents None 1252433461480711798231 /docs/en/application-note/AN3891.pdf 302526 /docs/en/application-note/AN3891.pdf AN3891 documents N 2009-09-08 MPR121 Baseline System /docs/en/application-note/AN3891.pdf /docs/en/application-note/AN3891.pdf Application Note N 645036621402383989 2022-12-07 pdf en Mar 26, 2010 645036621402383989 Application Note Y N MPR121 Baseline System 8 1 English AN3889: Touch acquisition takes a few different parts of the system in order to detect touch. The first stage of this process is to capture the pad capacitance. Our MPR121 utilizes the principle that a capacitor holds a fixed amount of charge at a specific electric potential. Both the implementation and the configuration will be described in this application note. 1252433113933700672334 PSP 294.8 KB None None documents None 1252433113933700672334 /docs/en/application-note/AN3889.pdf 294849 /docs/en/application-note/AN3889.pdf AN3889 documents N 2009-09-08 AN3889, MPR121 Capacitance Sensing Settings - Application Notes /docs/en/application-note/AN3889.pdf /docs/en/application-note/AN3889.pdf Application Note N 645036621402383989 2022-12-07 pdf en Mar 26, 2010 645036621402383989 Application Note Y N AN3889, MPR121 Capacitance Sensing Settings - Application Notes 9 1 English Touch acquisition takes a few different parts of the system in order to detect touch. The baseline filter and touch detection are tightly coupled. The purpose of the touch detection block is to use the baseline value and the 2nd level filter data to determine when a user has touched an electrode. The electrodes are independently configured using the Touch Threshold and Release Threshold registers. The global Debounce register also controls when a touch is detected by adding some minimal delay. The data is t 1252433679105703355323 PSP 211.7 KB None None documents None 1252433679105703355323 /docs/en/application-note/AN3892.pdf 211677 /docs/en/application-note/AN3892.pdf AN3892 documents N 2009-09-08 MPR121 Jitter and False Touch Detection /docs/en/application-note/AN3892.pdf /docs/en/application-note/AN3892.pdf Application Note N 645036621402383989 2022-12-07 pdf en Mar 26, 2010 645036621402383989 Application Note Y N MPR121 Jitter and False Touch Detection 10 1 English AN3944: The MPR121 is one of NXP Semiconductor's touch sensors and can fit into a wide range of applications. These applications can all be accommodated by having a device a with a very large range of flexibility. While all of these added features can allow for a wide range of flexibility, they can also add an unnecessary layer of complication. To start, the device is configured through an I2C serial interface. 1252435180705690921635 PSP 266.6 KB None None documents None 1252435180705690921635 /docs/en/application-note/AN3944.pdf 266613 /docs/en/application-note/AN3944.pdf AN3944 documents N N 2016-10-31 AN3944, MPR121 Quick Start Guide - Application Notes /docs/en/application-note/AN3944.pdf /docs/en/application-note/AN3944.pdf Application Note N 645036621402383989 2022-12-07 pdf N en Mar 26, 2010 645036621402383989 Application Note Y N AN3944, MPR121 Quick Start Guide - Application Notes 11 0 English MPR121 is a feature rich second generation touch sensor controller after NXP&#8217;s initial release of the MPR03x series device. MPR121 not only has priority unique features like independent electrode auto configuration (refer to AN3889), 13th simulated pseudo electrode for proximity detection (refer to AN3893), it also has 8 GPIO ports with LED driver capability. The GPIO and LED driver function can be used when not all the 12 input sensing channels are occupied for touch sensing detection, which is 1269644219350711216747 PSP 168.3 KB None None documents None 1269644219350711216747 /docs/en/application-note/AN3894.pdf 168277 /docs/en/application-note/AN3894.pdf AN3894 documents N 2010-03-26 MPR121 GPIO and LED Driver Function /docs/en/application-note/AN3894.pdf /docs/en/application-note/AN3894.pdf Application Note N 645036621402383989 2022-12-07 pdf en Mar 23, 2010 645036621402383989 Application Note N N MPR121 GPIO and LED Driver Function 12 1 English AN3747: NXP produces a range of Capacitive Touch Sensor Products using three sensing technologies. Each of these technologies will have slightly different response to changes in pad layout. Though, since each technology is measuring capacitance from the electrode to ground, the overall difference will be relatively insignificant. 1217371913520692492040 PSP 214.0 KB None None documents None 1217371913520692492040 /docs/en/application-note/AN3747.pdf 213982 /docs/en/application-note/AN3747.pdf AN3747 documents N 2008-07-29 AN3747, Pad Layout - Application Notes /docs/en/application-note/AN3747.pdf /docs/en/application-note/AN3747.pdf Application Note N 645036621402383989 2022-12-07 pdf en Sep 9, 2009 645036621402383989 Application Note Y N AN3747, Pad Layout - Application Notes User Guide User Guide 1 13 1 English Sensor Toolbox KITMPR121EVM Proximity Sensor Kit 1248106274316723976794 PSP 1.5 MB None None documents None 1248106274316723976794 /docs/en/user-guide/KITMPR121EVMPQSG.pdf 1514180 /docs/en/user-guide/KITMPR121EVMPQSG.pdf KITMPR121EVMPQSG documents N N 2009-07-20 Sensor Toolbox KITMPR121EVM Proximity Sensor Kit Quick Start Guide /docs/en/user-guide/KITMPR121EVMPQSG.pdf /docs/en/user-guide/KITMPR121EVMPQSG.pdf User Guide N 132339537837198660 2023-06-19 pdf N en Jul 20, 2009 132339537837198660 User Guide Y N Sensor Toolbox KITMPR121EVM Proximity Sensor Kit Quick Start Guide Brochure Brochure 2 14 10 Chinese BRSENSORS：Xtrinsic传感器远不止信号转换这么简单，还可以实现更高水平的情境传感和智能。借助多种传感器输入、逻辑和其他构建模块，恩智浦提高了模块化集成水平，为整个传感器平台带来了更多价值和更好的选择。我们提供了丰富的专业技术供您选择，让您更容易根据自己的需求量身定制传感器功能。 1139510547218720976475zh PSP 2.5 MB None None documents None 1139510547218720976475 /docs/zh/brochure/BRSENSORS.pdf 2493551 /docs/zh/brochure/BRSENSORS.pdf BRSENSORS documents N N 2016-10-31 BRSENSORS, Xtrinsic Sensing Solutions Intelligent contextual sensing - Brochure /docs/zh/brochure/BRSENSORS.pdf /docs/zh/brochure/BRSENSORS.pdf Brochure N 712453003803778552 2022-12-07 zh 712453003803778552 Brochure Y N BRSENSORS：Xtrinsic传感技术实现智能情景传感 - 手册 11 English BRSENSORS: Xtrinsic sensors go far beyond a sensor translating a signal it&#8217;s enabling greater levels of sensing context and intelligence. By increasing levels of modular integration with multiple sensor inputs, logic and other building blocks, NXP brings greater value and decision making to the overall sensing solution. We&#8217;ve put our expertise at your fingertips so it is easy to tailor our sensing capabilities for your needs. 1139510547218720976475 PSP 2.5 MB None None documents None 1139510547218720976475 /docs/en/brochure/BRSENSORS.pdf 2493551 /docs/en/brochure/BRSENSORS.pdf BRSENSORS documents N N 2016-10-31 BRSENSORS, Xtrinsic Sensing Solutions Intelligent contextual sensing - Brochure /docs/en/brochure/BRSENSORS.pdf /docs/en/brochure/BRSENSORS.pdf Brochure N 712453003803778552 2022-12-07 pdf N en Dec 2, 2014 712453003803778552 Brochure Y N BRSENSORS, Xtrinsic Sensing Solutions Intelligent contextual sensing - Brochure 15 2 Chinese 1306940498097721813460zh PSP 4.5 MB None None documents None 1306940498097721813460 /docs/zh/brochure/SENSPRODCAT.pdf 4516738 /docs/zh/brochure/SENSPRODCAT.pdf SENSPRODCAT documents N N 2016-10-31 Sensors NXP<sup>®</sup> Overview - Brochures /docs/zh/brochure/SENSPRODCAT.pdf /docs/zh/brochure/SENSPRODCAT.pdf Brochure N 712453003803778552 2022-12-07 zh 712453003803778552 Brochure N 飞思卡尔传感器概述 - 手册 2 English NXP&#8217;s introduction of the MAG3110 magnetometer is the first product of the expansion into magnetic sensors, complimenting our broad portfolio of inertial, pressure and touch sensors. NXP<sup>&#174;</sup> is a leading provider of sensors for the appliance, automotive, consumer, industrial and health care markets. The sensor ICs complement NXP&#8217;s broad portfolio of ZigBee &#174; technology, MCUs, microprocessors, digital signal processors, analog ICs, CodeWarrior<sup>&#174;</sup>. 1306940498097721813460 PSP 4.5 MB None None documents None 1306940498097721813460 /docs/en/brochure/SENSPRODCAT.pdf 4516738 /docs/en/brochure/SENSPRODCAT.pdf SENSPRODCAT documents N N 2016-10-31 Sensors NXP<sup>®</sup> Overview - Brochures /docs/en/brochure/SENSPRODCAT.pdf /docs/en/brochure/SENSPRODCAT.pdf Brochure N 712453003803778552 2022-12-07 pdf N en Jul 31, 2012 712453003803778552 Brochure Y N Sensors NXP<sup>®</sup> Overview - Brochures Fact Sheet Fact Sheet 4 16 5 Chinese 1242949699640742937404zh PSP 638.8 KB None None documents None 1242949699640742937404 /docs/zh/fact-sheet/SENSORTOOLBOXFS.pdf 638809 /docs/zh/fact-sheet/SENSORTOOLBOXFS.pdf SENSORTOOLBOXFS documents N N 2017-07-10 Sensor Toolbox - Fact Sheet /docs/zh/fact-sheet/SENSORTOOLBOXFS.pdf /docs/zh/fact-sheet/SENSORTOOLBOXFS.pdf Fact Sheet N 736675474163315314 2025-02-25 zh 736675474163315314 Fact Sheet N 传感器工具箱 - 简介 (pdf) 10 English NXP&#8217;s Sensor Toolbox offers a customizable selection of sensor development tools, accessories and software from NXP<sup>&#174;</sup>.s portfolio of acceleration, magnetic, pressure and touch sensors. Sensors enrich designs with a broad range of capabilities in detecting real-world conditions. Target Applications: Altimeters, Barometry, Blood pressure monitors. 1242949699640742937404 PSP 638.8 KB None None documents None 1242949699640742937404 /docs/en/fact-sheet/SENSORTOOLBOXFS.pdf 638809 /docs/en/fact-sheet/SENSORTOOLBOXFS.pdf SENSORTOOLBOXFS documents N N 2017-07-10 Sensor Toolbox - Fact Sheet /docs/en/fact-sheet/SENSORTOOLBOXFS.pdf /docs/en/fact-sheet/SENSORTOOLBOXFS.pdf Fact Sheet N 736675474163315314 2025-02-25 pdf N en Aug 27, 2020 736675474163315314 Fact Sheet Y N Sensor Toolbox - Fact Sheet 17 13 English Overview Over the past 25 years, NXP Semiconductors Sensor Products Division has supplied the world with more than 650 million micro-electromechanical systems (MEMS)-based sensors. 1092086607381736729272 PSP 2.2 MB None None documents None 1092086607381736729272 /docs/en/fact-sheet/SNSRSOLUTNTMFS.pdf 2216251 /docs/en/fact-sheet/SNSRSOLUTNTMFS.pdf SNSRSOLUTNTMFS documents N N 2016-10-31 Sensor Solutions /docs/en/fact-sheet/SNSRSOLUTNTMFS.pdf /docs/en/fact-sheet/SNSRSOLUTNTMFS.pdf Fact Sheet N 736675474163315314 2025-02-25 pdf N en Feb 12, 2020 736675474163315314 Fact Sheet Y N Sensor Solutions 18 1 Chinese 1254503998769722352156zh PSP 232.6 KB None None documents None 1254503998769722352156 /docs/zh/fact-sheet/MPR121FS.pdf 232649 /docs/zh/fact-sheet/MPR121FS.pdf MPR121FS documents N 2009-10-02 MPR121 12-pad touch sensor controller - Fact Sheet /docs/zh/fact-sheet/MPR121FS.pdf /docs/zh/fact-sheet/MPR121FS.pdf Fact Sheet N 736675474163315314 2022-12-07 zh 736675474163315314 Fact Sheet N MPR121：12按钮触摸传感器控制器 - 简介 2 English MPR121 capacitive touch sensor controller simplifies design in the user interface of choice which is touch sensing. Embedded developers require design simplicity and power conservation in a small form factor for compact system designs. This CMOS-based state machine simplifies designing numerous touch applications for lighting controls, mobile phones, MP3 players, remote controls and other low-power, hand-held, electronic products. 1254503998769722352156 PSP 232.6 KB None None documents None 1254503998769722352156 /docs/en/fact-sheet/MPR121FS.pdf 232649 /docs/en/fact-sheet/MPR121FS.pdf MPR121FS documents N 2009-10-02 MPR121 12-pad touch sensor controller - Fact Sheet /docs/en/fact-sheet/MPR121FS.pdf /docs/en/fact-sheet/MPR121FS.pdf Fact Sheet N 736675474163315314 2022-12-07 pdf en Nov 18, 2014 736675474163315314 Fact Sheet Y N MPR121 12-pad touch sensor controller - Fact Sheet 19 5 Chinese 1195497447066728868381zh PSP 514.7 KB None None documents None 1195497447066728868381 /docs/zh/fact-sheet/PROXFAMFS.pdf 514701 /docs/zh/fact-sheet/PROXFAMFS.pdf PROXFAMFS documents N N 2020-02-12 Proximity Sensor Solutions /docs/zh/fact-sheet/PROXFAMFS.pdf /docs/zh/fact-sheet/PROXFAMFS.pdf Fact Sheet N 736675474163315314 2022-12-07 zh 736675474163315314 Fact Sheet N 接近传感器解决方案 5 English Proximity sensors with simple linear&#13;&#10;or rotational sliders, rotary wheels and touch pads&#13;&#10;offer significant advantages for more intuitive&#13;&#10;user interfaces. 1195497447066728868381 PSP 514.7 KB None None documents None 1195497447066728868381 /docs/en/fact-sheet/PROXFAMFS.pdf 514701 /docs/en/fact-sheet/PROXFAMFS.pdf PROXFAMFS documents N N 2020-02-12 Proximity Sensor Solutions /docs/en/fact-sheet/PROXFAMFS.pdf /docs/en/fact-sheet/PROXFAMFS.pdf Fact Sheet N 736675474163315314 2022-12-07 pdf N en Oct 9, 2009 736675474163315314 Fact Sheet Y N Proximity Sensor Solutions Product Change Notice Product Change Notice 1 20 0 English 1436567582093713300068 PSP 3.5 KB None None documents None 1436567582093713300068 /docs/en/product-change-notice/PCN16772.htm 3495 /docs/en/product-change-notice/PCN16772.htm PCN16772 documents N 2015-07-10 Touch Sensor Portfolio Product Transfer (MPR031, MPR121) /docs/en/product-change-notice/PCN16772.htm /docs/en/product-change-notice/PCN16772.htm Product Change Notice N 454076741825495278 2022-12-07 htm en Jul 10, 2015 454076741825495278 Product Change Notice D N Touch Sensor Portfolio Product Transfer (MPR031, MPR121) Selector Guide Selector Guide 1 21 13 English For system designers who want to work with various sensor types such as accelerometers, pressure sensors and magnetic sensors for applications in automotive, industrial IoT and medical. 1424471489332715853854 PSP 253.0 KB None None documents None 1424471489332715853854 /docs/en/product-selector-guide/SENSSELECT.pdf 252964 /docs/en/product-selector-guide/SENSSELECT.pdf SENSSELECT documents N N 2016-10-31 Sensor Product Selector Guide /docs/en/product-selector-guide/SENSSELECT.pdf /docs/en/product-selector-guide/SENSSELECT.pdf Selector Guide N 553557935274807777 2025-02-25 pdf N en May 13, 2024 553557935274807777 Selector Guide Y N Sensor Product Selector Guide White Paper White Paper 1 22 1 English Today, inductive proximity sensors use Faraday&#8217;s Law of Electromagnetic Induction to detect the nearness of conductive materials without actually coming into contact with them. The primary deficiency of these sensors, however, is that they only detect metal conductors and different metal types can affect the detection range. 1196110582988715042709 PSP 552.1 KB None None documents None 1196110582988715042709 /docs/en/white-paper/PROXIMITYWP.pdf 552073 /docs/en/white-paper/PROXIMITYWP.pdf PROXIMITYWP documents N N 2016-10-31 Proximity Capacitive Sensor Technology for Touch Sensing Applications - White Papers /docs/en/white-paper/PROXIMITYWP.pdf /docs/en/white-paper/PROXIMITYWP.pdf White Paper N 918633085541740938 2022-12-07 pdf N en Mar 13, 2008 918633085541740938 White Paper Y N Proximity Capacitive Sensor Technology for Touch Sensing Applications - White Papers false 0 MPR121 downloads en true 1 Y PSP Application Note 10 /docs/en/application-note/AN3895.pdf 2009-09-08 1252434339112725629482 PSP 3 Feb 7, 2013 Application Note The MPR121 uses an I2C Serial Interface. The I2C protocol implementation and the specifics of communicating with the Touch Sensor Controller are detailed in this application note. None /docs/en/application-note/AN3895.pdf English documents 118533 None 645036621402383989 2022-12-07 N /docs/en/application-note/AN3895.pdf MPR121 Serial Communication - Application Notes /docs/en/application-note/AN3895.pdf documents 645036621402383989 Application Note N en None Y pdf 2 N N MPR121 Serial Communication - Application Notes 118.5 KB AN3895 N 1252434339112725629482 /docs/en/application-note/AN4600.pdf 2012-12-05 1354727783875731648424 PSP 4 Dec 5, 2012 Application Note This application note shows how to design a touch panel around the MPR121 capacitive touch sensor controller, using minimal hardware and software. None /docs/en/application-note/AN4600.pdf English documents 244704 None 645036621402383989 2022-12-07 N /docs/en/application-note/AN4600.pdf Designing a Touch Panel using the Xtrinsic MPR121 Capacitive Touch Sensor Controller - Application Note /docs/en/application-note/AN4600.pdf documents 645036621402383989 Application Note N en None N pdf 0 N N Designing a Touch Panel using the Xtrinsic MPR121 Capacitive Touch Sensor Controller - Application Note 244.7 KB AN4600 N 1354727783875731648424 /docs/en/application-note/AN3890.pdf 2009-09-08 1252433346324725263253 PSP 5 Mar 26, 2010 Application Note The capacitance sensing front end of the MPR121 produces data at extremely high rates, which significantly improves the capabilities of a filtering system. The capacitance engine described in AN3889 act on a 1 ms - 32 ms per sample data rate. THis application note will discuss the first and second level filters in the MPR121 and how they impact timing and power consumption. None /docs/en/application-note/AN3890.pdf English documents 164881 None 645036621402383989 2022-12-07 /docs/en/application-note/AN3890.pdf MPR121 Capacitance Sensing - Filtering and Timing /docs/en/application-note/AN3890.pdf documents 645036621402383989 Application Note N en None Y pdf 1 N MPR121 Capacitance Sensing - Filtering and Timing 164.9 KB AN3890 N 1252433346324725263253 /docs/en/application-note/AN3893.pdf 2010-03-26 1269643987306732553198 PSP 6 Mar 26, 2010 Application Note MPR121 is a feature rich, second generation touch sensor controller after NXP&#8217;s initial release of the MPR03x series device. Like MPR03x, MPR121 has a unique feature that all the electrode inputs can be internally connected together so that all the surface touch sensing area on the inputs are &#8220;summed&#8221; together to act as a single large electrode pad. This can effectively increase the total area of the sensing conductor for non-contact near proximity detection for hand approaching. None /docs/en/application-note/AN3893.pdf English documents 174141 None 645036621402383989 2022-12-07 /docs/en/application-note/AN3893.pdf MPR121 Proximity Detection /docs/en/application-note/AN3893.pdf documents 645036621402383989 Application Note N en None N pdf 0 N MPR121 Proximity Detection 174.1 KB AN3893 N 1269643987306732553198 /docs/en/application-note/AN3891.pdf 2009-09-08 1252433461480711798231 PSP 7 Mar 26, 2010 Application Note Touch acquisition takes a few different parts of the system in order to detect touch. The baseline filter and touch detection are tightly coupled. The purpose of the baseline filter is to &#8220;filter out touches&#8221; resulting in a system that is similar to a long term average but also takes into account that one specific signature. A touch must have different properties than noise and environmental change with respect to the filter response. This is accomplished through four register types that operate None /docs/en/application-note/AN3891.pdf English documents 302526 None 645036621402383989 2022-12-07 /docs/en/application-note/AN3891.pdf MPR121 Baseline System /docs/en/application-note/AN3891.pdf documents 645036621402383989 Application Note N en None Y pdf 1 N MPR121 Baseline System 302.5 KB AN3891 N 1252433461480711798231 /docs/en/application-note/AN3889.pdf 2009-09-08 1252433113933700672334 PSP 8 Mar 26, 2010 Application Note AN3889: Touch acquisition takes a few different parts of the system in order to detect touch. The first stage of this process is to capture the pad capacitance. Our MPR121 utilizes the principle that a capacitor holds a fixed amount of charge at a specific electric potential. Both the implementation and the configuration will be described in this application note. None /docs/en/application-note/AN3889.pdf English documents 294849 None 645036621402383989 2022-12-07 /docs/en/application-note/AN3889.pdf AN3889, MPR121 Capacitance Sensing Settings - Application Notes /docs/en/application-note/AN3889.pdf documents 645036621402383989 Application Note N en None Y pdf 1 N AN3889, MPR121 Capacitance Sensing Settings - Application Notes 294.8 KB AN3889 N 1252433113933700672334 /docs/en/application-note/AN3892.pdf 2009-09-08 1252433679105703355323 PSP 9 Mar 26, 2010 Application Note Touch acquisition takes a few different parts of the system in order to detect touch. The baseline filter and touch detection are tightly coupled. The purpose of the touch detection block is to use the baseline value and the 2nd level filter data to determine when a user has touched an electrode. The electrodes are independently configured using the Touch Threshold and Release Threshold registers. The global Debounce register also controls when a touch is detected by adding some minimal delay. The data is t None /docs/en/application-note/AN3892.pdf English documents 211677 None 645036621402383989 2022-12-07 /docs/en/application-note/AN3892.pdf MPR121 Jitter and False Touch Detection /docs/en/application-note/AN3892.pdf documents 645036621402383989 Application Note N en None Y pdf 1 N MPR121 Jitter and False Touch Detection 211.7 KB AN3892 N 1252433679105703355323 /docs/en/application-note/AN3944.pdf 2016-10-31 1252435180705690921635 PSP 10 Mar 26, 2010 Application Note AN3944: The MPR121 is one of NXP Semiconductor's touch sensors and can fit into a wide range of applications. These applications can all be accommodated by having a device a with a very large range of flexibility. While all of these added features can allow for a wide range of flexibility, they can also add an unnecessary layer of complication. To start, the device is configured through an I2C serial interface. None /docs/en/application-note/AN3944.pdf English documents 266613 None 645036621402383989 2022-12-07 N /docs/en/application-note/AN3944.pdf AN3944, MPR121 Quick Start Guide - Application Notes /docs/en/application-note/AN3944.pdf documents 645036621402383989 Application Note N en None Y pdf 1 N N AN3944, MPR121 Quick Start Guide - Application Notes 266.6 KB AN3944 N 1252435180705690921635 /docs/en/application-note/AN3894.pdf 2010-03-26 1269644219350711216747 PSP 11 Mar 23, 2010 Application Note MPR121 is a feature rich second generation touch sensor controller after NXP&#8217;s initial release of the MPR03x series device. MPR121 not only has priority unique features like independent electrode auto configuration (refer to AN3889), 13th simulated pseudo electrode for proximity detection (refer to AN3893), it also has 8 GPIO ports with LED driver capability. The GPIO and LED driver function can be used when not all the 12 input sensing channels are occupied for touch sensing detection, which is None /docs/en/application-note/AN3894.pdf English documents 168277 None 645036621402383989 2022-12-07 /docs/en/application-note/AN3894.pdf MPR121 GPIO and LED Driver Function /docs/en/application-note/AN3894.pdf documents 645036621402383989 Application Note N en None N pdf 0 N MPR121 GPIO and LED Driver Function 168.3 KB AN3894 N 1269644219350711216747 /docs/en/application-note/AN3747.pdf 2008-07-29 1217371913520692492040 PSP 12 Sep 9, 2009 Application Note AN3747: NXP produces a range of Capacitive Touch Sensor Products using three sensing technologies. Each of these technologies will have slightly different response to changes in pad layout. Though, since each technology is measuring capacitance from the electrode to ground, the overall difference will be relatively insignificant. None /docs/en/application-note/AN3747.pdf English documents 213982 None 645036621402383989 2022-12-07 /docs/en/application-note/AN3747.pdf AN3747, Pad Layout - Application Notes /docs/en/application-note/AN3747.pdf documents 645036621402383989 Application Note N en None Y pdf 1 N AN3747, Pad Layout - Application Notes 214.0 KB AN3747 N 1217371913520692492040 Brochure 2 /docs/en/brochure/BRSENSORS.pdf 2016-10-31 1139510547218720976475 PSP 14 Dec 2, 2014 Brochure BRSENSORS: Xtrinsic sensors go far beyond a sensor translating a signal it&#8217;s enabling greater levels of sensing context and intelligence. By increasing levels of modular integration with multiple sensor inputs, logic and other building blocks, NXP brings greater value and decision making to the overall sensing solution. We&#8217;ve put our expertise at your fingertips so it is easy to tailor our sensing capabilities for your needs. None /docs/en/brochure/BRSENSORS.pdf English documents 2493551 None 712453003803778552 2022-12-07 N /docs/en/brochure/BRSENSORS.pdf BRSENSORS, Xtrinsic Sensing Solutions Intelligent contextual sensing - Brochure /docs/en/brochure/BRSENSORS.pdf documents 712453003803778552 Brochure N en None Y pdf 11 N N BRSENSORS, Xtrinsic Sensing Solutions Intelligent contextual sensing - Brochure 2.5 MB BRSENSORS N 1139510547218720976475 /docs/en/brochure/SENSPRODCAT.pdf 2016-10-31 1306940498097721813460 PSP 15 Jul 31, 2012 Brochure NXP&#8217;s introduction of the MAG3110 magnetometer is the first product of the expansion into magnetic sensors, complimenting our broad portfolio of inertial, pressure and touch sensors. NXP<sup>&#174;</sup> is a leading provider of sensors for the appliance, automotive, consumer, industrial and health care markets. The sensor ICs complement NXP&#8217;s broad portfolio of ZigBee &#174; technology, MCUs, microprocessors, digital signal processors, analog ICs, CodeWarrior<sup>&#174;</sup>. None /docs/en/brochure/SENSPRODCAT.pdf English documents 4516738 None 712453003803778552 2022-12-07 N /docs/en/brochure/SENSPRODCAT.pdf Sensors NXP<sup>®</sup> Overview - Brochures /docs/en/brochure/SENSPRODCAT.pdf documents 712453003803778552 Brochure N en None Y pdf 2 N N Sensors NXP<sup>®</sup> Overview - Brochures 4.5 MB SENSPRODCAT N 1306940498097721813460 Data Sheet 2 /docs/en/data-sheet/MPR121.pdf 2009-09-08 1252432663304730020713 PSP 1 Feb 7, 2013 Data Sheet The MPR121 is the second generation sensor controller following the initial release of the MPR03x series of devices. The MPR121 features an increased internal intelligence plus Our second generation capacitance detection engine. Some major enhancements include an increased electrode count, a hardware configurable I2C address, an expanded filtering system with debounce, and completely independent electrodes with built-in autoconfiguration. None /docs/en/data-sheet/MPR121.pdf English documents 289918 None 980000996212993340 2022-12-07 N /docs/en/data-sheet/MPR121.pdf MPR121, Proximity Capacitive Touch Sensor Controller - Data Sheet /docs/en/data-sheet/MPR121.pdf documents 980000996212993340 Data Sheet N en None Y pdf 4 N N MPR121, Proximity Capacitive Touch Sensor Controller - Data Sheet 289.9 KB MPR121 N 1252432663304730020713 /docs/en/data-sheet/KITMRP121EVM_SCH.pdf 2010-02-18 1266526034924713583166 PSP 2 Jul 30, 2009 Data Sheet Schematics and Board Layouts for MPR121 and MPR121 Daughter Board None /docs/en/data-sheet/KITMRP121EVM_SCH.pdf English documents 979779 None 980000996212993340 2022-12-07 /docs/en/data-sheet/KITMRP121EVM_SCH.pdf KITMPR121EVM_SCH /docs/en/data-sheet/KITMRP121EVM_SCH.pdf documents 980000996212993340 Data Sheet N en None Y pdf C N KITMPR121EVM_SCH 979.8 KB KITMPR121EVM_SCH N 1266526034924713583166 Fact Sheet 4 /docs/en/fact-sheet/SENSORTOOLBOXFS.pdf 2017-07-10 1242949699640742937404 PSP 16 Aug 27, 2020 Fact Sheet NXP&#8217;s Sensor Toolbox offers a customizable selection of sensor development tools, accessories and software from NXP<sup>&#174;</sup>.s portfolio of acceleration, magnetic, pressure and touch sensors. Sensors enrich designs with a broad range of capabilities in detecting real-world conditions. Target Applications: Altimeters, Barometry, Blood pressure monitors. None /docs/en/fact-sheet/SENSORTOOLBOXFS.pdf English documents 638809 None 736675474163315314 2025-02-25 N /docs/en/fact-sheet/SENSORTOOLBOXFS.pdf Sensor Toolbox - Fact Sheet /docs/en/fact-sheet/SENSORTOOLBOXFS.pdf documents 736675474163315314 Fact Sheet N en None Y pdf 10 N N Sensor Toolbox - Fact Sheet 638.8 KB SENSORTOOLBOXFS N 1242949699640742937404 /docs/en/fact-sheet/SNSRSOLUTNTMFS.pdf 2016-10-31 1092086607381736729272 PSP 17 Feb 12, 2020 Fact Sheet Overview Over the past 25 years, NXP Semiconductors Sensor Products Division has supplied the world with more than 650 million micro-electromechanical systems (MEMS)-based sensors. None /docs/en/fact-sheet/SNSRSOLUTNTMFS.pdf English documents 2216251 None 736675474163315314 2025-02-25 N /docs/en/fact-sheet/SNSRSOLUTNTMFS.pdf Sensor Solutions /docs/en/fact-sheet/SNSRSOLUTNTMFS.pdf documents 736675474163315314 Fact Sheet N en None Y pdf 13 N N Sensor Solutions 2.2 MB SNSRSOLUTNTMFS N 1092086607381736729272 /docs/en/fact-sheet/MPR121FS.pdf 2009-10-02 1254503998769722352156 PSP 18 Nov 18, 2014 Fact Sheet MPR121 capacitive touch sensor controller simplifies design in the user interface of choice which is touch sensing. Embedded developers require design simplicity and power conservation in a small form factor for compact system designs. This CMOS-based state machine simplifies designing numerous touch applications for lighting controls, mobile phones, MP3 players, remote controls and other low-power, hand-held, electronic products. None /docs/en/fact-sheet/MPR121FS.pdf English documents 232649 None 736675474163315314 2022-12-07 /docs/en/fact-sheet/MPR121FS.pdf MPR121 12-pad touch sensor controller - Fact Sheet /docs/en/fact-sheet/MPR121FS.pdf documents 736675474163315314 Fact Sheet N en None Y pdf 2 N MPR121 12-pad touch sensor controller - Fact Sheet 232.6 KB MPR121FS N 1254503998769722352156 /docs/en/fact-sheet/PROXFAMFS.pdf 2020-02-12 1195497447066728868381 PSP 19 Oct 9, 2009 Fact Sheet Proximity sensors with simple linear&#13;&#10;or rotational sliders, rotary wheels and touch pads&#13;&#10;offer significant advantages for more intuitive&#13;&#10;user interfaces. None /docs/en/fact-sheet/PROXFAMFS.pdf English documents 514701 None 736675474163315314 2022-12-07 N /docs/en/fact-sheet/PROXFAMFS.pdf Proximity Sensor Solutions /docs/en/fact-sheet/PROXFAMFS.pdf documents 736675474163315314 Fact Sheet N en None Y pdf 5 N N Proximity Sensor Solutions 514.7 KB PROXFAMFS N 1195497447066728868381 Product Change Notice 1 /docs/en/product-change-notice/PCN16772.htm 2015-07-10 1436567582093713300068 PSP 20 Jul 10, 2015 Product Change Notice None /docs/en/product-change-notice/PCN16772.htm English documents 3495 None 454076741825495278 2022-12-07 /docs/en/product-change-notice/PCN16772.htm Touch Sensor Portfolio Product Transfer (MPR031, MPR121) /docs/en/product-change-notice/PCN16772.htm documents 454076741825495278 Product Change Notice N en None D htm 0 N Touch Sensor Portfolio Product Transfer (MPR031, MPR121) 3.5 KB PCN16772 N 1436567582093713300068 Selector Guide 1 /docs/en/product-selector-guide/SENSSELECT.pdf 2016-10-31 1424471489332715853854 PSP 21 May 13, 2024 Selector Guide For system designers who want to work with various sensor types such as accelerometers, pressure sensors and magnetic sensors for applications in automotive, industrial IoT and medical. None /docs/en/product-selector-guide/SENSSELECT.pdf English documents 252964 None 553557935274807777 2025-02-25 N /docs/en/product-selector-guide/SENSSELECT.pdf Sensor Product Selector Guide /docs/en/product-selector-guide/SENSSELECT.pdf documents 553557935274807777 Selector Guide N en None Y pdf 13 N N Sensor Product Selector Guide 253.0 KB SENSSELECT N 1424471489332715853854 User Guide 1 /docs/en/user-guide/KITMPR121EVMPQSG.pdf 2009-07-20 1248106274316723976794 PSP 13 Jul 20, 2009 User Guide Sensor Toolbox KITMPR121EVM Proximity Sensor Kit None /docs/en/user-guide/KITMPR121EVMPQSG.pdf English documents 1514180 None 132339537837198660 2023-06-19 N /docs/en/user-guide/KITMPR121EVMPQSG.pdf Sensor Toolbox KITMPR121EVM Proximity Sensor Kit Quick Start Guide /docs/en/user-guide/KITMPR121EVMPQSG.pdf documents 132339537837198660 User Guide N en None Y pdf 1 N N Sensor Toolbox KITMPR121EVM Proximity Sensor Kit Quick Start Guide 1.5 MB KITMPR121EVMPQSG N 1248106274316723976794 White Paper 1 /docs/en/white-paper/PROXIMITYWP.pdf 2016-10-31 1196110582988715042709 PSP 22 Mar 13, 2008 White Paper Today, inductive proximity sensors use Faraday&#8217;s Law of Electromagnetic Induction to detect the nearness of conductive materials without actually coming into contact with them. The primary deficiency of these sensors, however, is that they only detect metal conductors and different metal types can affect the detection range. None /docs/en/white-paper/PROXIMITYWP.pdf English documents 552073 None 918633085541740938 2022-12-07 N /docs/en/white-paper/PROXIMITYWP.pdf Proximity Capacitive Sensor Technology for Touch Sensing Applications - White Papers /docs/en/white-paper/PROXIMITYWP.pdf documents 918633085541740938 White Paper N en None Y pdf 1 N N Proximity Capacitive Sensor Technology for Touch Sensing Applications - White Papers 552.1 KB PROXIMITYWP N 1196110582988715042709 true Y Products

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