Analog Devices AD7719 Product Info

HIGH RESOLUTION Σ-Δ ADCS

• 2 Independent ADCs (16- and 24-Bit Resolution)
• Factory-Calibrated (Field Calibration Not Required)
• Output Settles in 1 Conversion Cycle (Single Conversion Mode)
• Programmable Gain Front End
• Simultaneous Sampling and Conversion of 2 Signal Sources
• Separate Reference Inputs for Each Channel
• Simultaneous 50 Hz and 60 Hz Rejection at 20 Hz Update Rate
ISOURCE SELECT™

• 24-Bit No Missing Codes—Main ADC
• 13-Bit p-p Resolution @ 20 Hz, 20 mV Range
• 18-Bit p-p Resolution @ 20 Hz, 2.56 V Range
INTERFACE

• 3-Wire Serial
• SPI^®, QSPI™, MICROWIRE™, and DSP Compatible
• Schmitt Trigger on SCLK

The AD7719 is a complete analog front-end for low frequency measurement applications. It contains two high-resolution sigma delta 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 REFIN1/128 to REFIN1. Signals can be converted directly from a transducer without the need for signal conditioning. The 16-bit aux channel does not have a PGA and has an input signal range of REFIN2 or REFIN2/2.