TL4051C12QDCKR

Overview

The TL4051C12QDCKR is a precision micropower shunt voltage reference manufactured by Texas Instruments. It features a fixed output voltage of 1.225V with an initial accuracy tolerance of ±0.5%. The device operates within an extended temperature range from -40°C to +125°C and utilizes an SC-70-5 surface-mount package. Key electrical specifications include a maximum operating input voltage of 15V, a maximum cathode current of 12mA, and a typical minimum operating current of 60µA. The unit exhibits a low temperature coefficient of 50ppm/°C and maintains stability across all capacitive load conditions without requiring external output capacitors.

Feature Summary

• Provides a fixed 1.225V output or adjustable voltage via external resistors
• Operates stably under all capacitive load conditions without external output capacitors
• Delivers low output noise and low dynamic impedance for precise regulation
• Supports wide operating current ranges suitable for battery-powered applications

Applications

• Data acquisition systems
• Power supply monitoring circuits
• Precision audio equipment
• Automotive electronics
• Battery-operated devices

Procurement Notes

Verify the specific suffix DCKR corresponds to the SC-70-5 package configuration when sourcing. Confirm that the C-grade tolerance meets the required accuracy for the target application. Ensure the extended temperature rating aligns with environmental constraints. Cross-reference the datasheet revision to confirm pinout compatibility with existing board layouts.

Selection Notes

Select this component when a stable, low-noise reference is needed in a compact footprint. The fixed 1.225V output simplifies design compared to adjustable variants. Consider the ±0.5% tolerance if higher precision grades like A or B are not required. The micropower characteristic makes it ideal for energy-constrained portable systems.

Part Context

This part belongs to the TL4051 family of precision shunt voltage references. It shares functional similarities with other members but differs in output voltage, tolerance grade, and package type. The Q-designation indicates automotive-grade qualification, while the C-grade specifies the initial accuracy level. It complements the broader portfolio of Texas Instruments power management solutions.

Replacement Considerations

TL4051A12QDCKR offers tighter ±0.1% tolerance. TL4051B12QDCKR provides ±0.2% tolerance. LM4041C12IDCKR is a similar shunt reference with different thermal characteristics.