AD7655

Rev. B | Page 10 of 28

Pin No.

Mnemonic

Description

35

CNVST

DI

Start Conversion. A falling edge on CNVST puts the internal sample-and-hold into the hold state and

initiates a conversion. In impulse mode (IMPULSE = HIGH), if CNVST is held LOW when the acquisition

immediately started.

37

REF

AI

This input pin is used to provide a reference to the converter.

38

REFGND

AI

Reference Input Analog Ground.

39, 41

INB1, INB2

AI

Channel B Analog Inputs.

40, 45

INBN, INAN

AI

Analog Inputs Ground Senses. Allow to sense each channel ground independently.

42, 43

REFB, REFA

AI

These inputs are the references applied to Channel A and Channel B, respectively.

44, 46

INA2, INA1

AI

Channel A Analog Inputs.