AD7780BRZ

Overview

The AD7780BRZ is a 24-bit Sigma-Delta analog-to-digital converter (ADC) manufactured by Analog Devices Inc. in a 16-lead TSSOP package. It features an internal programmable gain amplifier with selectable gains of 1 or 128, and operates on a single supply voltage ranging from 2.7 V to 5.25 V for both analog and digital domains. The device provides two pin-selectable update rates: 10 Hz and 16.7 Hz. Typical power consumption is 330 μA at Gain 128 and 115 μA at Gain 1. It includes an internal oscillator, a bridge power-down switch, and a 2-wire serial interface.

Feature Summary

• Pin-programmable filter response and in-amp gain selection
• Internal clock oscillator eliminates external crystal requirements
• Integrated bridge power-down switch for sensor current optimization
• Simultaneous 50 Hz/60 Hz line frequency rejection

Applications

• Weigh scales
• Pressure measurement
• Industrial process control
• Portable instrumentation

Procurement Notes

Verify the specific suffix BRZ indicates the RoHS-compliant variant within the 16-lead TSSOP package configuration. Confirm that the ordering information matches the manufacturer's official documentation to ensure correct package type and environmental compliance status before procurement.

Selection Notes

Select this component when designing low-power front-end solutions for bridge sensors such as load cells. Ensure the application requires a differential input range compatible with ±VREF/gain and can accommodate the settling times associated with the 10 Hz or 16.7 Hz update rates.

Part Context

This part belongs to the AD7780 series of ultralow power Sigma-Delta ADCs. It is designed specifically for applications requiring high resolution and low noise performance while minimizing system power consumption. The device integrates most necessary signal conditioning components onto a single chip.

Replacement Considerations

Consult the manufacturer's official documentation for verified substitute part numbers. Do not assume functional equivalence with other models without verifying pin compatibility and electrical specifications.