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
