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AD7745 - 24-Bit Capacitance-to-Digital Converter

Datasheet Summary

Description

The AD7745/AD7746 are a high resolution, Σ-Δ capacitance-todigital converter (CDC).

The capacitance to be measured is connected directly to the device inputs.

Features

  • Capacitance-to-digital converter New standard in single chip solutions Interfaces to single or differential floating sensors Resolution down to 4 aF (that is, up to 21 ENOB) Accuracy: 4 fF Linearity: 0.01% Common-mode (not changing) capacitance up to 17 pF Full-scale (changing) capacitance range: ±4 pF Tolerant of parasitic capacitance to ground up to 60 pF Update rate: 10 Hz to 90 Hz Simultaneous 50 Hz and 60 Hz rejection at 16 Hz Temperature sensor on-chip Resolution: 0.1°C, accuracy: ±2°C Vol.

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Datasheet Details

Part number AD7745
Manufacturer Analog Devices
File Size 529.42 KB
Description 24-Bit Capacitance-to-Digital Converter
Datasheet download datasheet AD7745 Datasheet
Additional preview pages of the AD7745 datasheet.

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Full PDF Text Transcription

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www.DataSheet4U.com 24-Bit Capacitance-to-Digital Converter with Temperature Sensor AD7745/AD7746 FEATURES Capacitance-to-digital converter New standard in single chip solutions Interfaces to single or differential floating sensors Resolution down to 4 aF (that is, up to 21 ENOB) Accuracy: 4 fF Linearity: 0.01% Common-mode (not changing) capacitance up to 17 pF Full-scale (changing) capacitance range: ±4 pF Tolerant of parasitic capacitance to ground up to 60 pF Update rate: 10 Hz to 90 Hz Simultaneous 50 Hz and 60 Hz rejection at 16 Hz Temperature sensor on-chip Resolution: 0.1°C, accuracy: ±2°C Voltage input channel Internal clock oscillator 2-wire serial interface (I2C®-compatible) Power 2.7 V to 5.25 V single-supply operation 0.
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