REF1112AIDBZTG4

Overview

The REF1112AIDBZTG4 is a shunt voltage reference manufactured by Texas Instruments, featuring a fixed output voltage of 1.25 V. It operates within an input voltage range of 1.7 V to 5.5 V and consumes a typical operating current of 1 μA. The device offers an initial accuracy of ±0.2% and maintains a low temperature coefficient of 30 ppm/°C from 0°C to +70°C, extending to 50 ppm/°C across the -40°C to +85°C range. It supports an operating current range of 1.2 μA to 5 mA and exhibits a typical output noise of 25 μVpp between 0.1 Hz and 10 Hz. The component is housed in a compact SOT-23-3 package.

Feature Summary

• Ultra-low power consumption with a 1 μA operating current suitable for battery-powered applications
• Compact SOT-23-3 package design optimized for space-sensitive circuits
• High precision with ±0.2% initial accuracy and low temperature drift characteristics

Applications

• Battery-powered instruments
• Building security sensors
• Medical equipment
• Field transmitters
• Calibrators

Procurement Notes

Verify the specific suffix 'G4' against the manufacturer's latest ordering information to ensure compliance with current RoHS standards and packaging configurations. Confirm that the SOT-23-3 package aligns with your PCB footprint requirements. Check for any recent product change notifications regarding pinout or electrical specifications before finalizing the design. Ensure the supply chain source provides genuine components to maintain performance integrity.

Selection Notes

Select this component when designing systems requiring minimal quiescent current and high precision in a small form factor. It serves as a direct replacement for larger packages like the REF1004 in space-constrained designs. Consider its 1.2 μA minimum operating current requirement when sizing biasing resistors. Evaluate the 25 μVpp noise specification against your signal-to-noise ratio needs for low-frequency applications.

Part Context

The REF1112 belongs to Texas Instruments' family of micro-package shunt voltage references. It complements other low-power components such as the OPA349 operational amplifiers and TLV240x comparators. Designed for power-sensitive environments, it replaces older, bulkier reference solutions while maintaining high accuracy. The series is intended for industrial and medical applications where size and energy efficiency are critical constraints.

Replacement Considerations

Publicly confirmed substitute part numbers include REF1112AIDBZR.