AD7190 Datasheet PDF - ADI

●GENERAL DESCRIPTION

●The AD7190 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (∑-Δ) analog to digital converter (ADC). The on-chip low noise gain stage means that signals of small amplitude can be interfaced directly to the ADC.

●FEATURES

●RMS noise: 8.5 nV @ 4.7 Hz (gain = 128)

●16 noise free bits @ 2.4 kHz (gain = 128)

●Up to 22.5 noise free bits (gain = 1)

●Offset drift: 5 nV/°C

●Gain drift: 1 ppm/°C

●Specified drift over time

●2 differential/4 pseudo differential input channels

●Automatic channel sequencer

●Programmable gain (1 to 128)

●Output data rate: 4.7 Hz to 4.8 kHz

●Internal or external clock

●Simultaneous 50 Hz/60 Hz rejection

●4 general-purpose digital outputs

●Power supply

●   AVDD: 4.75 V to 5.25 V

●   DVDD: 2.7 V to 5.25 V

●Current: 6 mA

●Temperature range: –40°C to +105°C

●Interface

●   3-wire serial

●   SPI, QSPI™, MICROWIRE™, and DSP compatible

●   Schmitt trigger on SCLK

●APPLICATIONS

●Weigh scales

●Strain gauge transducers

●Pressure measurement

●Temperature measurement