AD7730LBRZ-REEL

Overview

The AD7730LBRZ-REEL is a bridge transducer analog-to-digital converter (ADC) from Analog Devices, housed in a 24-lead SOIC package. It features a Sigma-Delta architecture with 24-bit resolution and no missing codes. The device includes two buffered differential programmable gain inputs and operates on a single +5 V supply. Key static performance metrics include an integral nonlinearity of 18 ppm of FSR, offset drift of 5 nV/°C, and gain drift of 2 ppm/°C. It supports update rates up to 600 S/s with a maximum power dissipation of 125 mW.

Feature Summary

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

Applications

• Weigh scales
• Pressure measurement

Procurement Notes

Verify the component status as the AD7730L series may be discontinued or subject to limited availability. Confirm the specific suffix 'BRZ' indicates lead-free RoHS compliance and the 'REEL' designation specifies tape-and-reel packaging. Ensure the operating temperature range matches the industrial specification of -40°C to +85°C.

Selection Notes

Select the AD7730L over the standard AD7730 when a master clock frequency of 2.4576 MHz is required, as opposed to the 4.9152 MHz specified for the AD7730. This variant is suitable for applications requiring low power consumption and high precision in bridge sensor interfaces.

Part Context

This part belongs to the AD7730 family of complete analog front ends designed for weigh-scale and pressure measurement. The AD7730L variant is specifically characterized for operation with a 2.4576 MHz external clock source, distinguishing it from the standard AD7730 which utilizes a 4.9152 MHz clock.

Replacement Considerations

The AD7730BRZ-REEL is a compatible alternative within the same family, differing primarily in the supported master clock frequency (4.9152 MHz vs. 2.4576 MHz). Verify clock compatibility before substitution.