AD7788BRM

Overview

The AD7788BRM is a low power, 16-bit Sigma-Delta analog-to-digital converter (ADC) from Analog Devices. It operates on a single supply voltage ranging from 2.5 V to 5.25 V, with a maximum normal mode current of 75 µA and a power-down current of 1 µA. The device features an internal clock oscillator and provides an output update rate of 16.6 Hz, enabling simultaneous 50 Hz and 60 Hz rejection. It includes one differential analog input channel and supports external reference voltages between 0.1 V and VDD. The component utilizes a 3-wire serial interface compatible with SPI, QSPI, Microwire, and DSP protocols.

Feature Summary

• Integrated Sigma-Delta architecture with internal clock oscillator for simplified system design
• Low power consumption suitable for battery-operated applications
• Simultaneous 50 Hz and 60 Hz line frequency rejection via digital filtering
• Versatile serial interface supporting multiple communication protocols

Applications

• Smart transmitters
• Portable instrumentation
• Weigh scales
• Temperature measurement
• Pressure measurement

Procurement Notes

Verify the specific package suffix against official documentation, as the provided datasheet references the 10-lead MSOP variant. Confirm grade specifications, such as B-grade temperature ranges, match project requirements. Ensure external reference voltage constraints are met within the operational supply limits.

Selection Notes

Select this component for low-frequency, high-precision measurements requiring minimal power. Compare resolution needs against the AD7789 if higher bit depth is required. Verify interface compatibility with the host microcontroller's SPI or Microwire implementation before integration.

Part Context

The AD7788 serves as the 16-bit resolution counterpart to the 24-bit AD7789 within the same product family. Both devices share identical pinouts, interfaces, and low-power characteristics, differing primarily in resolution and noise performance. This allows for scalable design options across precision measurement applications.

Replacement Considerations

The AD7789 is a parameter-equivalent alternative offering higher resolution. Other family members may require verification of pin compatibility and software register mapping differences.