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
