TL4051B12QDCKR

Overview

The TL4051B12QDCKR is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 1.225V with an initial accuracy of ±0.2% (Grade B). The device operates within an extended temperature range of -40°C to +125°C and utilizes a SC-70-5 surface-mount package. Key electrical characteristics include a maximum temperature coefficient of 50ppm/°C, a typical quiescent current of 60µA, and a maximum cathode current of 12mA. It maintains stability across all capacitive loads without requiring external output capacitors.

Feature Summary

• Provides a fixed 1.225V output with high initial accuracy
• Operates stably under all capacitive load conditions without external capacitors
• Features low dynamic impedance and low noise for precision applications
• Supports extended industrial temperature ranges up to 125°C

Applications

• Data acquisition systems
• Portable instrumentation
• Battery-powered equipment
• Precision audio applications

Procurement Notes

Verify the specific suffix 'Q' indicates automotive qualification or extended temperature grade compliance as per the manufacturer's datasheet. Confirm the package type matches the design footprint requirements. Ensure the Grade B accuracy specification meets the circuit tolerance needs. Check for RoHS compliance status in the latest documentation.

Selection Notes

Select this component when a stable, low-noise reference is required for battery-operated devices. The micropower consumption makes it suitable for energy-constrained applications. The SC-70-5 package offers space savings compared to larger packages. Consider the extended temperature range if the operating environment exceeds standard industrial limits.

Part Context

This part belongs to the TL4051 family of precision shunt voltage references from Texas Instruments. The family includes variants with different accuracies (Grade A, B, C) and temperature ranges (Industrial, Extended/Automotive). The TL4051 series is designed to replace traditional Zener diodes in applications requiring higher precision and lower power consumption.

Replacement Considerations

Compatible substitutes include other parts from the TL4051 family with matching voltage and accuracy, such as TL4051A12QDCKR or TL4051C12QDCKR. Verify pinout compatibility and thermal performance before substitution.