The AD7719BRZ is a complete analog front end sigma-delta Analog-to-digital Converter (ADC) 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. 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. The device operates from a 32kHz crystal with an on-chip PLL generating the required internal operating frequency. The output data rate from the part is software programmable. The peak-to-peak resolution from the part varies with the programmed gain and output data rate.
● High resolution
● Factory-calibrated
● Programmable gain front end
● Simultaneous sampling and conversion of 2 signal sources
● Separate reference inputs for each channel
● 3-wire serial SPI®/QSPI™/MICROWIRE™/DSP compatible Schmitt trigger on SCLK
● Rail-rail input buffer and PGA
● On-chip temperature sensor
● Dual switchable excitation current sources
● Low-side power switches
● Reference detect circuit
