AD7797 Datasheet PDF - ADI

GENERAL DESCRIPTION

●The AD7796/AD7797 are complete, analog front ends for high precision, bridge sensor applications such as weigh scales. The AD7796/AD7797 contain a Σ-Δ ADC capable of 16-/24-bit resolution, respectively. The on-chip instrumentation amplifier has a fixed gain of 128, allowing small amplitude signals such as those from bridge sensors to be directly interfaced to the ADC.

●FEATURES

●RMS noise: 65 nV

●Instrumentation amp

●Temperature sensor

●Internal clock oscillator

●Simultaneous 50 Hz/60 Hz rejection

●Update rate: 4.17 Hz to 123 Hz

●Current: 250 μA typ

●Power-down: 1 μA

●Power supply: 2.7 V to 5.25 V

●–40°C to +85°C temperature range

●Independent interface power supply

●16-lead TSSOP

●INTERFACE

●3-wire serial

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

●Schmitt trigger on SCLK

●APPLICATIONS

●Weigh scales

●Strain gages

●Industrial process control

●Instrumentation

●Portable instrumentation