TL4051B12QDBZR

Overview

The TL4051B12QDBZR is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 1.225 V with an initial accuracy tolerance of ±0.2%. The device operates within an extended industrial temperature range from -40°C to +125°C and utilizes a SOT-23-3 surface-mount package. Key electrical specifications include a maximum temperature coefficient of 50 ppm/°C, a typical dynamic impedance of 0.06 Ω, and a maximum cathode current of 12 mA. The minimum operating current is typically 45 µA.

Feature Summary

• Provides a stable 1.225 V fixed output without requiring external capacitors for stability across all capacitive load conditions
• Delivers high precision performance with low noise and low temperature coefficient suitable for sensitive measurement applications
• Operates efficiently in micropower mode with minimal quiescent current consumption

Applications

• Data acquisition systems requiring precise voltage references
• Portable battery-powered instrumentation and test equipment
• Process control loops and industrial monitoring circuits

Procurement Notes

Verify the specific suffix QDBZR confirms the automotive-grade qualification and extended temperature range (-40°C to +125°C). Ensure the B grade designation matches the required ±0.2% initial accuracy tolerance. Confirm the SOT-23-3 package type aligns with the PCB footprint requirements. Cross-reference the manufacturer datasheet revision to ensure compatibility with design specifications.

Selection Notes

Select this component when a fixed 1.225 V reference is needed with automotive reliability and extended temperature operation. The B grade offers tighter accuracy than C grade variants. Consider the SOT-23-3 package size constraints. Evaluate if the 12 mA maximum current meets the circuit biasing needs. Compare against adjustable versions if voltage flexibility is required.

Part Context

This part belongs to the TL4051 family of micropower shunt voltage references. It shares architectural similarities with the TL4050 series but offers different voltage options and packaging configurations. The Q-series designation indicates automotive qualification under AEC-Q100 standards, distinguishing it from standard industrial grade parts.

Replacement Considerations

TL4051B12IDBZR: Industrial grade version with limited temperature range (-40°C to +85°C). TL4051C12QDBZR: Lower accuracy (±0.5%) automotive variant. TL4051AQDBZR: Higher accuracy (±0.1%) automotive variant.