AD7152

Obsolete

12-Bit Capacitance-to-Digital Converter (2 Capacitance Input Channels)

Data Sheet (Rev. A) Product Selection Table

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Overview

Capacitance-to-digital converters
Interfaces to floating sensors
Resolution down to 0.25 fF (that is, up to 12 ENOB)
Linearity: 0.05%
Common-mode (not changing) capacitance up to 5 pF

Internal clock oscillator
2-wire serial interface (I²C-compatible)
Power
2.7 V to 3.6 V single-supply operation
100 μA current consumption
Operating temperature: −40°C to +85°C
See data sheet for additional features

The AD7152 / AD7153 are 12-bit sigma-delta (Σ-Δ) capacitance-to-digital converters (CDCs). The capacitance to be measured is connected directly to the device inputs. The architecture features inherent high resolution (12-bit no missing codes, up to 12-bit effective resolution) and high linearity (±0.05%). The AD7152 / AD7153 have four capacitance input ranges per operation mode, ±0.25 pF to ±2 pF in differential mode and 0.5 pF to 4 pF in single-ended mode.

The AD7152 / AD7153 can accept up to 5 pF common-mode capacitance (not changing), which can be balanced by a programmable on-chip, digital-to-capacitance converter (CAPDAC).

The AD7153 has one capacitance input channel, while the AD7152 has two channels. Each channel can be configured as single-ended or differential. The AD7152 / AD7153 are designed for floating capacitive sensors.

The AD7152 / AD7153 have a 2-wire, I²C-compatible serial interface. Both devices can operate with a single power supply from 2.7 V to 3.6 V. They are specified over the temperature range of −40°C to +85°C and are available in a 10-lead MSOP.

APPLICATIONS

Automotive, industrial, and medical systems for

Pressure measurement
Position sensing
Level sensing
Flowmeters
Humidity sensing

Documentation

Frequently Asked Question 1

FAQ 03/20/2018

This is the most up-to-date revision of the Data Sheet.

Software Resources

Device Drivers 1

AD7152 IIO Capacitance to Digital Converter Linux Driver

Can't find the software or driver you need?

Evaluation Kits

AD7152 Evaluation Board

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Product Details

The EVAL-AD7152EBZ is a fully featured evaluation board for the AD7152. The evaluation board is operated with a PC via a standard USB connection with software provided enabling the user to perform detailed analysis of the CDC's performance. This software includes the technical note describing the operation and set up of the evaluation board.