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Programmable Controller for Capacitance Touch Sensors
Analog Devices, Inc
Description
The AD7142 and AD7142-1 are integrated capacitance-to-digital converters (CDCs) with on-chip environmental calibration for use in systems requiring a novel user input method. The AD7142 and...
Features
Visit our detailed system design support and FAQ page. View our Touch Control Demo. AD7142 web seminar: Design and Develop Innovative and Robust Touch Sensor Interfaces Using Capacitive-to-Digital Converters. Specifications Resolution (Bits) 16bit T-Put Rate 27.8SPS # Chan 14 Pwr Diss (max) 3.6mW Sleep Pwr Diss 65?W Supply V Single(+2.6 to +3.6), Single(+2.7), Single(+3), Single(+3.3) Ain Range ± 2 pF (Delta C) Product Description CAPTouch (TM) Programmable Controller for 2-Electrode Capacitance Sensor with SPI or I2C Interface Ref Int/Ext Int/Ext Find Similar Products Functional Block Diagram Enlarge a.SFLink{display:block;background-color:#FFFFFF;border:solid 1px #7F9DB9;font-size:.75em;width:150px;padding:3px;} Symbols and Footprints Other Diagrams: 0)popUp('../imageDisplay/?Path=' + this[this.selectedIndex].value + '&Title=' + this[this.selectedIndex].text)">Pin Out Diagram AD7142 AD7142-1 Features Programmable capacitance-to-digital converter 36 ms update rate ?????(@ maximum sequence length) Better than 1 fF resolution 14 capacitance sensor input channels No external RC tuning components required Automatic conversion sequencer On-chip automatic calibration logic Automatic compensation ?????for environmental changes Automatic adaptive threshold and ?????sensitivity levels On-chip RAM to store calibration data SPI?-compatible serial interface (AD7142) I2C?-compatible serial interface (AD7142-1) Separate VDRIVE level for serial interface Interrupt output and GPIO 32-lead, 5 mm x 5 mm LFCSP_VQ 2.6 V to 3.6 V supply voltage Low operating current Full power mode: less than 1 mA Low power mode: 50 ?A
Related Datasheets
| Part Number | Description | Category |
| • AD7142 | Programmable Controller for Capacitance Touch Sensors | Cards and Modules |
| • AD7143 | Programmable Controller for Capacitance Touch Sensors | Cards and Modules |
| • AD7147 | CapTouch? Programmable Controller for Single-Electrode Capacitance Sensors | Cards and Modules |
| • AD7150 | Ultra-Low Power, 2-Channel, Capacitance Converter for Proximity Sensing | Cards and Modules |
| • AD7151 | Ultra-Low Power, 1-Channel, Capacitance Converter for Proximity Sensing | Cards and Modules |
| • AD7745 | 24-bit, 1 Channel Capacitance to Digital Converter | Cards and Modules |
| • AD7746 | 24-bit, 2 Channel Capacitance to Digital Converter | Cards and Modules |
| • AD7747 | 24-Bit Capacitance-to-Digital Converter with Temperature Sensor | Cards and Modules |
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