REF3312AIDBZR

Overview

The REF3312AIDBZR is a precision series voltage reference IC manufactured by Texas Instruments, housed in an SOT-23-3 surface-mount package. It provides a fixed output voltage of 1.25 V with an initial accuracy of ±0.15%. The device operates within an input voltage range of 1.7 V to 5.5 V and draws a typical supply current of 3.9 µA. It features a temperature coefficient of 30 ppm/°C and supports a maximum shunt current of 5 mA. The component functions reliably across an extended operating temperature range from -40°C to +125°C.

Feature Summary

• Delivers high-precision fixed voltage output with tight initial accuracy tolerance
• Optimized for low-power applications through ultra-low quiescent current consumption
• Ensures stable performance over wide thermal variations with low temperature drift
• Compact footprint design suitable for space-constrained surface-mount layouts

Applications

• Portable battery-powered instrumentation systems
• Data acquisition and signal conditioning circuits
• Precision analog-to-digital converter (ADC) references
• Medical diagnostic equipment requiring stable bias voltages

Procurement Notes

Verify the specific suffix 'R' indicates reel packaging when ordering. Confirm moisture sensitivity level (MSL 2) requirements for storage and handling procedures. Ensure the input voltage supplied to the device remains within the specified 1.7 V to 5.5 V operational window to maintain regulation integrity. Check RoHS compliance status against regional regulatory standards prior to integration into final assemblies.

Selection Notes

Select this component when a fixed 1.25 V reference is required with minimal power draw. The SOT-23-3 package offers a compact solution for dense PCB designs. Consider the ±0.15% initial accuracy and 30 ppm/°C drift characteristics for applications demanding long-term stability. Evaluate the 5 mA load capability against the circuit's current requirements to ensure adequate drive strength without exceeding specifications.

Part Context

This part belongs to the REF3312 family of micropower voltage references designed for portable and industrial applications. It serves as a critical reference element in mixed-signal systems where noise and drift must be minimized. The device integrates bandgap technology to provide consistent performance across varying environmental conditions and supply voltages.

Replacement Considerations

The REF3312AIDBZT is a verified substitute offering identical electrical specifications but packaged in cut-tape format instead of reel.