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 parts 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 package.

Applications

Automotive, industrial, and medical systems for
Pressure measurement
Position sensing
Level sensing
Flowmeters
Humidity sensing

Data Sheet, Rev. 0, 5/08

Part#	Resolution (Bits)	T-Put Rate	# Chan	Supply V	Pwr Diss (max)	Input Base C (pF Max)	Cin Range (pF)	Pkg Type	Price* (1000-4999)	Product Description	Interface
AD7142	16	27.8SPS	14	Single(+2.6 to +3.6), Single(+2.7), Single(+3), Single(+3.3)	3.6mW	20	±2	CSP	$1.37	CAPTouch (TM) Programmable Controller for 2-Electrode Capacitance Sensor with SPI or I2C Interface	I²C/Ser 2-Wire, Ser, SPI
AD7143	16	43.5SPS	8	Single(+2.6 to +3.6)	3.6mW	20	±2	CSP	$1.25	CAPTouch (TM) Programmable Controller for 2-Electrode Capacitance Sensor with I2C Interface	I²C/Ser 2-Wire, Ser
AD7147	16	111SPS	13	Single(+3), Single(+3.3)	3.6mW	20	±8	CSP	$1.30	CAPTouch (TM) Programmable Controller w/ SPI or I2C Interface for Single-Electrode Cap Sensors	I²C/Ser 2-Wire, Ser, SPI
AD7150	12	100SPS	2	Single(+2.7 to +3.6)	0.43mW	10	±4	SOP	$1.37	Ultra-Lo Pwr, 2-Ch Capacitance Converter for Proximity Sensing Applications	I²C/Ser 2-Wire, Ser
AD7151	12	100SPS	1	Single(+2.7 to +3.6)	0.3mW	10	±4	SOP	$1.37	Ultra-Low Power, 1-Ch, Capacitance Converter for Proximity Sensing Applications	I²C/Ser 2-Wire, Ser
AD7745	24	90SPS	1	Single(+2.7 to +5.25)	4.25mW	17	±4	SOP	$4.66	24-Bit, Cap-to-Dig Conv. w/ 1 SE/Diff Capacitive Input Ch for Interface to Dual Electrode Cap Sensor	I²C/Ser 2-Wire, Ser
AD7746	24	90SPS	2	Single(+2.7 to +5.25)	4.25mW	17	±4	SOP	$5.01	24-bit, Cap-to-Dig Conv. w/ 2 SE/Diff Capacitive Input Ch for interface to Dual Electrode Cap Sensor	I²C/Ser 2-Wire
AD7747	24	45.5SPS	1	Single(+2.7 to +5.25)	4.25mW	17	±8	SOP	$4.66	24-bit, Cap-to-Dig Conv w/1 SE/Diff Capacitive Input Ch for interface to Single Electrode Cap Sensor	I²C/Ser 2-Wire, Ser

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

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• 军用温度范围：－55ºC ～＋125ºC
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