AD7191BRUZ-REEL Datasheet PDF - ADI

GENERAL DESCRIPTION

●The AD7191 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (Σ-Δ) ADC. The on-chip low noise gain stage means that signals of small amplitude can be interfaced directly to the ADC. It contains two differential analog inputs. The part also includes a temperature sensor that can be used for temperature compensation.

●FEATURES

●Pin-programmable output rate

●Output data rate: 10 Hz, 50 Hz, 60 Hz, 120 Hz

●Pin-programmable PGA

●Gain: 1, 8, 64, 128

●Pin-programmable power-down and reset

●RMS noise: 15 nV @ 10 Hz (gain = 128)

●Up to 21.5 noise free bits (gain = 1)

●Internal or external clock

●Bridge power-down switch

●Offset drift: 5 nV/°C

●Gain drift: 1 ppm/°C

●Specified drift over time

●Simultaneous 50 Hz/60 Hz rejection

●Internal temperature sensor

●Power supply: 3 V to 5.25 V

●Current: 4.35 mA

●Temperature range: –40°C to +105°C

●Package: 24-lead TSSOP

●INTERFACE

●2-wire serial

●SPI, QSPI™, and MICROWIRE™ compatible

●Schmitt trigger on SCLK

●APPLICATIONS

●Weigh scales

●Strain gauge transducers

●Pressure measurement

●Medical and scientific instrumentation