AD7798BRUZ-REEL Datasheet PDF - ADI

GENERAL DESCRIPTION

●The AD7798/AD7799 are low power, low noise, complete analog front ends 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 27 nV for the AD7799 and 40 nV for the AD7798 when the update rate equals 4.17 Hz.

●FEATURES

●RMS noise:

●  27 nV at 4.17 Hz (AD7799)

●  65 nV at 16.7 Hz (AD7799)

●  40 nV at 4.17 Hz (AD7798)

●  85 nV at 16.7 Hz (AD7798)

●Current: 380 µA typical

●Power-down: 1 µA maximum

●Low noise, programmable gain, instrumentation amp

●Update rate: 4.17 Hz to 470 Hz

●3 differential inputs

●Internal clock oscillator

●Simultaneous 50 Hz/60 Hz rejection

●Reference detect

●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

●Weigh scales

●Pressure measurement

●Strain gauge transducers

●Gas analysis

●Industrial process control

●Instrumentation

●Portable instrumentation

●Blood analysis

●Smart transmitters

●Liquid/gas chromotography

●6-digit DVM