GENERAL DESCRIPTION
The AD7780 is a complete low power front-end solution for bridge sensor products, including weigh scales, strain gages, and pressure sensors. It contains a precision, low power, 24-bit sigma delta (Σ-Δ) ADC; an on-chip, low noise programmable gain amplifier (PGA); and an on-chip oscillator.

FEATURES
Pin-programmable filter response Update rate: 10 Hz or 16.7 Hz
Pin-programmable in-amp gain
Pin-programmable power-down and reset
Status function
Internal clock oscillator
Internal bridge power-down switch
Current
   115 μA typical (gain = 1)
   330 μA typical (gain = 128)
Simultaneous 50 Hz/60 Hz rejection
Power supply: 2.7 V to 5.25 V
−40°C to +105°C temperature range
Independent interface power supply
Packages
   14-lead, narrow body SOIC
   16-lead TSSOP
2-wire serial interface (read-only device)
   SPI compatible
   Schmitt trigger on SCLK

APPLICATIONS
Weigh scales
Pressure measurement
Industrial process control
Portable instrumentation