AD7780BRZ

AD7780 is a 24bit, pin-programmable, ultralow power Sigma-Delta ADC. A complete low power front-end solution for bridge sensor products, including weigh scales, strain gauges, and pressure sensors. It contains a precision, low power, 24bit sigma delta (Σ-Δ) ADC; an on-chip, low noise programmable gain amplifier (PGA) and an on-chip oscillator. The AD7780 is particularly suitable for portable or battery-operated products where very low power is required. The AD7780 also has a power-down mode that allows the user to switch off the power to the bridge sensor and power down the AD7780 when not converting, thus increasing the battery life of the product. Typical applications include weigh scales, pressure measurement, industrial process control and portable instrumentation.

• Pin-programmable filter response: update rate: 10Hz or 16.7Hz
• Pin-programmable in-amp gain
• Pin-programmable power-down and reset
• Status function, internal clock oscillator and internal bridge power-down switch
• Current: 115μA typical (gain = 1) and 330μA typical (gain = 128)
• Simultaneous 50Hz/60Hz rejection
• Power supply: 2.7V to 5.25V and independent interface power supply
• 2-wire serial interface (read-only device) SPI compatible and Schmitt trigger on SCLK
• 14 lead NSOIC package
• Operating temperature range from -40 to 105°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party