AD7730BRU-REEL

Overview

The AD7730BRU-REEL is a complete analog front end for weigh-scale and pressure measurement applications, manufactured by Analog Devices Inc. It features a 24-bit Sigma-Delta ADC with a peak-to-peak resolution of 230,000 counts. The device includes two buffered differential programmable gain inputs, an on-chip 6-bit DAC for offset removal, and a serial interface compatible with microcontrollers. Operating from a single +5 V supply, it supports input ranges from ±10 mV to ±80 mV. Key performance metrics include an offset drift of 5 nV/°C, gain drift of 2 ppm/°C, and integral nonlinearity of 18 ppm of FSR.

Feature Summary

• 24-bit resolution with 230,000 counts peak-to-peak
• Two-channel buffered differential programmable gain front end
• On-chip 6-bit DAC for TARE voltage removal
• Low offset drift (5 nV/°C) and gain drift (2 ppm/°C)

Applications

• Weigh scales
• Pressure measurement

Procurement Notes

Verify the package type matches the 'RU' suffix designation as TSSOP-24 or SOIC-24 per the datasheet. Confirm the 'B' grade indicates the industrial temperature range of -40°C to +85°C. Ensure the REEL packaging format aligns with production requirements. Cross-reference the specific revision level against current manufacturing documentation.

Selection Notes

Select this component for high-precision transducer interfaces requiring low drift. Verify that the required input voltage ranges (±10 mV to ±80 mV) match the application signals. Ensure the system clock frequency supports the desired output data rates. Check compatibility with the host microcontroller's serial interface timing constraints.

Part Context

This part belongs to the AD7730 family of bridge transducer ADCs. It is designed specifically for applications demanding high linearity and stability over time. The BRU variant denotes the plastic surface-mount package options available within the standard industrial product line.

Replacement Considerations

Check for direct pin-compatible upgrades within the AD7730 series. Verify if the AD7730L meets the specific clock frequency requirements, as it operates at a different master clock specification compared to the standard AD7730.