AD7142ACPZ-500RL7 Capacitive-to-Digital and Touch Screen Controllers by Analog Devices

Status: Production
Series: AD7142
RoHS: Compliant
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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 AD7142-1 can interface to external capacitance sensors implementing functions such as capacitive buttons, scroll bars, or wheels.The CDC has 14 inputs channeled through a switch matrix to a 16-bit, 250 kHz sigma-delta (∑-Δ) capacitance-to-digital converter. The CDC is capable of sensing changes in the capacitance of the external sensors and uses this information to register a sensor activation. The external sensors can be arranged as a series of buttons, as a scroll bar or wheel, or as a combination of sensor types. By programming the registers, the user has full control over the CDC setup. High resolution sensors require minor software to run on the host processor. The AD7142 and AD7142-1 have on-chip calibration logic to account for changes in the ambient environment. The calibration sequence is performed automatically and at continuous intervals, when the sensors are not touched. This ensures that there are no false or nonregistering touches on the external sensors due to a changing environment.The AD7142 has an SPI-compatible serial interface, and the AD7142-1 has an I2C-compatible serial interface. Both parts have an interrupt output, as well as a general-purpose input/ output (GPIO). The AD7142 and AD7142-1 are available in a 32-lead, 5 mm × 5 mm LFCSP_VQ and operate from a 2.6 V to 3.6 V supply. The operating current consumption is less than 1 mA, falling to 50 μA in low power mode (conversion interval of 400 ms).

Prices starting from US$2.27


Distributor Starting From Stock
Logo for Analog Devices Analog Devices US$2.46
1,534
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Logo for Newark Electronics Newark Electronics US$3.01
500
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Logo for element14 element14 US$2.37
500
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Logo for Farnell Farnell US$2.42
500
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Logo for Richardson RFPD Richardson RFPD US$2.27
-
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Alternative Descriptions

Capacitance to Digital Convert | Analog Devices
Programmable Controller, Spi, Lfcsp-Ep Rohs Compliant: Yes |Analog Devices AD7142ACPZ-500RL7 | Newark Electronics
PROGRAMMABLE CONTROLLER, SPI, LFCSP-EP | element14
CONVERTER - ADC | Richardson RFPD


Frequently Asked Questions

Where can I find additional details, specifications and documents for a AD7142ACPZ-500RL7?

Additional datasheets, footprints and schematics for AD7142ACPZ-500RL7 are listed on our Part Details page. You can also find images and similar parts to AD7142ACPZ-500RL7 on this page.

What pricing and inventory information can I view?

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What category does AD7142ACPZ-500RL7 fall under?

The AD7142ACPZ-500RL7 is listed under Capacitive-to-Digital and Touch Screen Controllers.

Can I view similar or alternative parts?

You can view similar parts to AD7142ACPZ-500RL7 when available in the Capacitive-to-Digital and Touch Screen Controllers range under the specifications section at the bottom of the details page.

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Is the AD7142ACPZ-500RL7 RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

Which authorised distributors for AD7142ACPZ-500RL7 have stock available?

Authorised distributors including Analog Devices, Newark Electronics, element14, Farnell and Richardson RFPD have stock available or on a lead time for AD7142ACPZ-500RL7.

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