TL4051BQDCKR

Overview

The TL4051BQDCKR is a precision micropower shunt voltage reference manufactured by Texas Instruments. It features an adjustable output voltage range from 1.225V to 10V, set via external resistors. The device offers a maximum initial tolerance of 0.2% and a temperature coefficient of 50 ppm/°C. It operates within an extended industrial temperature range of -40°C to 125°C. The component is housed in a compact SC-70-5 surface-mount package and requires a typical cathode current of 65 µA for regulation.

Feature Summary

• Adjustable output voltage selectable between 1.225V and 10V using external resistor dividers
• Stable operation across all capacitive load conditions without requiring output capacitors
• Low dynamic impedance and low noise characteristics ensure consistent performance
• Micropower consumption with minimal quiescent current requirements

Applications

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

Procurement Notes

Verify the specific suffix 'Q' indicates the extended temperature grade (-40°C to 125°C) and 'DCKR' denotes the SC-70-5 tape-and-reel packaging. Confirm the 'B' suffix corresponds to the 0.2% initial accuracy class. Ensure compatibility with the target PCB footprint for the five-terminal SC-70 package before finalizing procurement orders.

Selection Notes

Select this component when an adjustable voltage reference is required in space-constrained designs. The SC-70-5 package provides a small form factor suitable for portable devices. The extended temperature rating makes it appropriate for automotive or harsh industrial environments where standard industrial grades are insufficient. Verify that the external resistor network can achieve the desired output voltage within the specified tolerance limits.

Part Context

This part belongs to the TL4051 family of micropower shunt voltage references from Texas Instruments. The family includes fixed-output variants (e.g., 1.225V) and adjustable versions. The 'Q' designation signifies the extended temperature range variant, while 'B' indicates the 0.2% accuracy tier. It serves as a stable reference source for analog-to-digital converters and sensor interfaces.

Replacement Considerations

Direct pin-compatible substitutes include other TL4051 series parts with matching accuracy and temperature grades, such as TL4051BI or TL4051AI variants in the same package. Cross-family replacements like the LM4040 series may require circuit adjustments due to different pinouts or electrical characteristics.