The AD7719 is a complete analog front end for low frequency measurement applications. It contains two high resolution sigmadelta ADCs, switchable matched excitation current sources, low-side power switches, digital I/O port, and temperature sensor. The 24-bit main channel with PGA accepts fully differential, unipolar, and bipolar input signal ranges from 1.024 x REFIN1/128 to 1.024 x REFIN1. Signals can be converted directly from a transducer without the need for signal conditioning. The 16-bit auxiliary channel has an input signal range of REFIN2 or REFIN2/2.