AD7730BRUZ-REEL

Overview

The AD7730BRUZ-REEL is a bridge transducer analog-to-digital converter featuring a 24-bit sigma-delta architecture in a 24-lead TSSOP package. It provides two buffered differential programmable gain inputs with ranges from ±10 mV to ±80 mV and supports external reference voltages of 1 V to 5 V. The device achieves 230,000 peak-to-peak counts resolution with an offset drift of 5 nV/°C and gain drift of 2 ppm/°C. Operating on a single +5 V supply, it includes an on-chip 6-bit DAC for tare removal and offers serial interface compatibility with microcontrollers.

Feature Summary

• 24-bit resolution with 230,000 peak-to-peak counts and 18 ppm max integral nonlinearity
• Two-channel buffered differential programmable gain front end with input ranges up to ±80 mV
• Low drift specifications: 5 nV/°C offset drift and 2 ppm/°C gain drift
• Integrated 6-bit DAC for offset/tare removal and AC excitation control outputs

Applications

• Weigh scales
• Pressure measurement

Procurement Notes

Verify the REEL suffix indicates tape-and-reel packaging rather than tube packaging when sourcing components. Confirm the B version meets the -40°C to +85°C industrial temperature range requirements. Ensure the external master clock frequency matches the specified 4.9152 MHz for optimal performance.

Selection Notes

Select this component for applications requiring high precision with low drift over time and temperature. The dual-channel design allows multiplexing between two sensors or using one channel for auxiliary digital outputs. Verify that the external reference voltage falls within the 1 V to 5 V operational range to ensure correct scaling.

Part Context

The AD7730 is part of Analog Devices' bridge transducer ADC family, designed specifically for low-level signal conditioning. It integrates the modulator, programmable gain amplifier, and digital filter into a single chip, reducing the need for external analog components typically required in high-resolution measurement systems.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.