AD7194 Datasheet PDF - ADI

GENERAL DESCRIPTION

●The AD7194 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC). The on-chip low noise gain stage means that signals of small amplitude can interface directly to the ADC.

●FEATURES

●Fast settling filter option

●8 differential/16 pseudo differential input channels

●RMS noise: 11 nV at 4.7 Hz (gain = 128)

●15.5 noise-free bits at 2.4 kHz (gain = 128)

●Up to 22 noise-free bits (gain = 1)

●Offset drift: ±5 nV/°C

●Gain drift: ±1 ppm/°C

●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: 3 V to 5.25 V

●   DVDD: 2.7 V to 5.25 V

●Current: 4.65 mA

●Temperature range: −40°C to +105°C

●Package: 32-lead LFCSP

●Interface

●   3-wire serial

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

●   Schmitt trigger on SCLK

●APPLICATIONS

●PLC/DCS analog input modules

●Data acquisition

●Strain gage transducers