AD7730LBRUZ-REEL

Overview

The AD7730LBRUZ-REEL is a bridge transducer analog-to-digital converter in a 24-lead TSSOP package. It features a sigma-delta architecture with 24-bit resolution and no missing codes. The device operates from a single +5 V supply, accepting differential input ranges of ±10 mV to ±80 mV. Key specifications include an offset drift of 5 nV/°C, gain drift of 2 ppm/°C, and integral nonlinearity of 18 ppm FSR. It supports a master clock frequency of 2.4576 MHz and provides a serial interface compatible with microcontrollers.

Feature Summary

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

Applications

• Weigh scales
• Pressure measurement

Procurement Notes

Verify the component matches the AD7730L specification sheet, specifically noting the 2.4576 MHz master clock requirement which distinguishes it from the standard AD7730. Confirm the 24-lead TSSOP package type and ensure the revision level aligns with current manufacturing standards. Check for RoHS compliance status as indicated on the datasheet.

Selection Notes

Select this part when low drift over time and temperature is critical for bridge sensor applications. The AD7730L variant requires a 2.4576 MHz clock source, unlike the AD7730 which uses 4.9152 MHz. Ensure the system design accommodates the single +5 V supply requirement and utilizes the internal calibration features to minimize initial errors.

Part Context

This component belongs to the AD7730 family of bridge transducer ADCs manufactured by Analog Devices. The 'L' suffix denotes specific performance parameters, primarily the reduced master clock frequency requirement of 2.4576 MHz compared to the standard AD7730. It shares the same functional block diagram and pinout but differs in timing specifications.

Replacement Considerations

The standard AD7730 is a functional substitute but requires a 4.9152 MHz clock instead of 2.4576 MHz. Other AD7730 variants like AD7730BRUZ share the same package but must be verified against the specific L-series clock and drift specifications.