What’s the difference between the AD7606 and the AD7606B?
The AD7606B is a directly pin replacement for AD7606, with higher input impedance, throughput rate and extended temperature range, see A.N. 1559 for further details on how to migrate from AD7606 design into AD7606B.
However, by writing to its memory map, a series of advanced features can be enabled:
-system gain/offset/phase calibration,
-per channel analog input range selection (including +/-2.5V range),
-sensor disconnect detection
-additional oversampling ratios
-lower Vdrive operation