AD7712,pdf datasheet (Signal Conditioning ADC)

The AD7712 is a complete analog front end for low frequency

measurement applicaTIons. The device has two analog input

channels and accepts either low level signals directly from a transducer

or high level (±4 VREF) signals, and outputs a serial

digital word. It employs a sigma-delta conversion technique to

realize up to 24 bits of no missing codes performance. The low

level input signal is applied to a proprietary programmable gain

front end based around an analog modulator. The high level

analog input is attenuated before being applied to the same

modulator. The modulator output is processed by an on-chip

digital filter. The first notch of this digital filter can be programmed

via the on-chip control register, allowing adjustment of the filter

cutoff and settling TIme.