TL4051B12IDBZT

Overview

The TL4051B12IDBZT 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 industrial temperature range of -40°C to +85°C and utilizes a SOT-23-3 surface-mount package. Key electrical characteristics include a maximum temperature coefficient of 50ppm/°C, a typical quiescent current of 60µA, and a low output noise of 20µVrms. It supports a cathode current range up to 12mA and maintains stability across all capacitive loads without requiring external compensation components.

Feature Summary

• Provides a fixed 1.225V output with high initial accuracy
• Operates stably under all capacitive load conditions without external capacitors
• Features low output noise and low temperature coefficient for precision applications
• Designed for micropower consumption with minimal quiescent current

Applications

• Data acquisition systems
• Portable battery-powered equipment
• Precision audio circuits
• Process control instrumentation

Procurement Notes

Verify the specific suffix IDBZT corresponds to the SOT-23-3 package and industrial temperature grade (-40°C to +85°C). Confirm that the B-grade designation indicates the required ±0.2% initial accuracy tolerance. Ensure the Q-grade variant is not selected if extended temperature operation beyond 85°C is not required for the specific design constraints.

Selection Notes

Select this component when a stable, low-noise reference is needed in a compact SOT-23-3 footprint. The fixed 1.225V output suits applications requiring precise low-voltage references. Consider the 60µA quiescent current for battery life calculations. Verify that the 12mA maximum cathode current meets the circuit's biasing requirements while maintaining regulation within the specified temperature range.

Part Context

This part belongs to the TL4051 family of micropower shunt voltage references from Texas Instruments. The family offers various output voltages and accuracy grades (A, B, C) alongside industrial and automotive temperature options. The TL4051 series is designed to replace older zener-based references, offering superior stability and lower power consumption in space-constrained portable designs.

Replacement Considerations

TL4051B12IDBZR

FAQ

Does the TL4051B12IDBZT require an output capacitor for stability?

No, the device is designed to be stable with any capacitive load and does not require an external output capacitor.

What is the operating temperature range for this specific part number?

The TL4051B12IDBZT operates within the industrial temperature range of -40°C to +85°C.