AD7798BRU-REEL Datasheet PDF - ADI

●GENERAL DESCRIPTION

●The AD7798/AD7799 is a low power, low noise, complete analog front end for high precision measurement applications. The AD7798/AD7799 contains a low noise 16/24-bit ∑-∆ ADC with three differential analog inputs. The on-chip low noise instrumentation amplifier means that signals of small amplitude can be interfaced directly to the ADC. With a gain setting of 64, the rms noise is 30 nV for the AD7799 and 40 nV for the AD7798 when the update rate equals 4.17 Hz.

●FEATURES

●RMS noise: 80 nV at 16.6 Hz (AD7798)

●           65 nV at 16.6 Hz (AD7799)

●           30 nV at 4.17 Hz (AD7799)

●Current: 400 µA typ

●Power-down: 1 µA max

●Low noise programmable gain instrumentation-amp

●Update rate: 4.17 Hz to 500 Hz

●3 differential inputs

●Internal clock oscillator

●Simultaneous 50 Hz/60 Hz rejection

●Low Side Power Switch

●Programmable Digital Outputs

●Burnout currents

●Power supply: 2.7 V to 5.25 V

●–40°C to +105°C temperature range

●Independent interface power supply

●16-lead TSSOP package

●INTERFACE

●3-wire serial

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

●Schmitt trigger on SCLK

●APPLICATIONS

●Pressure measurement

●Weigh scales

●Strain gauge transducers

●Gas analysis

●Industrial process control

●Instrumentation

●Portable instrumentation

●Blood analysis

●Smart transmitters

●Liquid/gas chromotography

●6-digit DVM