TL4051B12QDBZT

Overview

The TL4051B12QDBZT is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 1.225V with an initial accuracy tolerance of ±0.2%. The device operates within an extended temperature range of -40°C to +125°C and utilizes a SOT-23-3 surface-mount package. Key electrical characteristics include a maximum temperature coefficient of 50ppm/°C, a typical dynamic impedance of 0.6Ω, and a low output noise of 20µVRMS (0.1Hz to 10Hz). It requires a minimum cathode current of 65µA for regulation and supports a maximum shunt current of 12mA.

Feature Summary

• Provides stable voltage reference without requiring external output capacitors across all capacitive load conditions
• Delivers high precision with low temperature coefficient and low output noise for sensitive applications
• Operates efficiently with micropower consumption suitable for battery-powered systems

Applications

• Data acquisition systems
• Portable instrumentation
• Battery-powered equipment
• Process control systems

Procurement Notes

Verify the complete part number against official Texas Instruments documentation to ensure correct grade and temperature rating. Confirm that the SOT-23-3 package matches the design footprint requirements. Check for specific suffix variations if automotive qualification or specific tape-and-reel specifications are required for the manufacturing process.

Selection Notes

Select this component when a fixed 1.225V reference with ±0.2% accuracy is needed in a compact SOT-23-3 package. It is suitable for designs requiring operation up to 125°C. Consider the TL4051A series for tighter ±0.1% tolerance or the TL4051C series for cost-sensitive applications with ±0.5% tolerance, provided the performance margins allow.

Part Context

This device belongs to the TL4051 family of precision micropower shunt voltage references from Texas Instruments. The family offers fixed and adjustable output options in space-saving packages. The 'B' designation indicates the ±0.2% initial accuracy grade, while 'Q' denotes the extended temperature range capability, distinguishing it from industrial grade variants.

Replacement Considerations

Compatible alternatives within the same family include TL4051A12QDBZT for higher accuracy or TL4051C12QDBZT for lower cost. Other manufacturers offering similar 1.225V shunt references in SOT-23-3 packages may serve as substitutes if pinout and electrical parameters are verified.