REF3125AIDBZTG4

Overview

The REF3125AIDBZTG4 is a precision series voltage reference from Texas Instruments, delivering a fixed output of 2.5 V with an initial accuracy of ±0.2%. It operates within an input voltage range of 2.55 V to 5.5 V and draws a typical supply current of 100 µA. The device features a low temperature coefficient of 20 ppm/°C and supports a maximum load current of 10 mA. It functions reliably across an extended temperature range of -40°C to +125°C and is housed in a compact SOT-23-3 package.

Feature Summary

• Provides stable precision voltage regulation suitable for high-accuracy analog circuits
• Operates with ultra-low power consumption ideal for battery-powered applications
• Maintains stability under capacitive loads without requiring external compensation components

Applications

• Portable instrumentation and handheld measurement devices
• Medical equipment requiring precise signal conditioning
• Data acquisition systems utilizing analog-to-digital converters
• Battery-operated sensor interfaces

Procurement Notes

Verify the specific suffix G4 indicates RoHS compliance and manufacturing lot details. Confirm the component status as active or obsolete through official Texas Instruments channels before procurement planning. Ensure the SOT-23-3 package dimensions match the target PCB footprint requirements.

Selection Notes

Select this component when a fixed 2.5 V reference with tight tolerance is required. Consider the 100 µA quiescent current against system power budgets. Verify that the 10 mA drive capability meets the downstream circuit demands. Ensure the operating temperature range aligns with the environmental conditions of the final assembly.

Part Context

This part belongs to the REF31xx family of low-power, precision voltage references designed for space-constrained applications. The REF3125 variant specifically provides a 2.5 V output, distinguishing it from other outputs in the series such as 2.048 V or 4.096 V options. The DBZR suffix denotes tape-and-reel packaging for automated assembly processes.

Replacement Considerations

Check for direct pin-compatible alternatives within the same REF31xx family if different output voltages are needed. Verify cross-reference data sheets for equivalent performance metrics in terms of noise, drift, and current consumption.