Datasheet

AD7654
Rev. B | Page 10 of 28
Pin No. Mnemonic Type
1
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
phase (t
8
) is complete, the internal sample-and-hold is put into the hold state and a conversion is
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.
1
AI = analog input; DI = digital input; DI/O = bidirectional digital; DO = digital output; P = power.