REF3312AIDBZRG4

Overview

The REF3312AIDBZRG4 is a fixed-output series voltage reference from Texas Instruments, providing a precise 1.25 V output with an initial accuracy of ±0.15%. It operates within an input voltage range of 1.7 V to 5.5 V and draws a typical supply current of 3.9 µA. The device features a low temperature coefficient of 30 ppm/°C and supports a maximum shunt current of 5 mA. It is housed in a compact SOT-23-3 package and functions reliably across an extended temperature range from -40°C to +125°C.

Feature Summary

• Provides stable 1.25 V reference voltage with high initial accuracy
• Ultra-low power consumption suitable for battery-operated systems
• Low temperature drift ensures precision over wide thermal ranges
• Compact surface-mount packaging for space-constrained designs

Applications

• Portable instrumentation requiring low power references
• Battery-powered measurement devices
• Data acquisition systems needing stable voltage sources
• Medical equipment with strict power constraints

Procurement Notes

Verify the G4 suffix indicates RoHS compliance and manufacturing changes per Texas Instruments documentation. Confirm the SOT-23-3 package matches your PCB footprint requirements. Check moisture sensitivity levels for proper storage and reflow soldering profiles. Ensure the 1.25 V output aligns with your system's reference needs.

Selection Notes

Select this component when a fixed 1.25 V reference is required with minimal quiescent current. The ±0.15% initial accuracy suits applications demanding high precision without external trimming. Consider the SOT-23-3 package for limited board space. Verify input voltage stays within the 1.7 V to 5.5 V operational range for correct regulation.

Part Context

This part belongs to the REF33xx family of low-power voltage references from Texas Instruments. The REF3312 variant specifically provides a 1.25 V output, distinguishing it from other outputs in the series like 2.5 V or 3.3 V options. The G4 suffix denotes a lead-free, RoHS-compliant version manufactured according to updated environmental standards.

Replacement Considerations

REF3312AIDBZR is the non-G4 equivalent with identical electrical specifications but potentially different manufacturing details.