TL4051BQDBZT

Overview

The TL4051BQDBZT is a precision micropower shunt voltage reference manufactured by Texas Instruments. It features a fixed output of 1.225V with an initial tolerance of ±0.2% and a temperature coefficient of 50 ppm/°C. The device operates within an extended industrial temperature range of -40°C to 125°C and utilizes a SOT-23-3 surface-mount package. It requires a minimum cathode current of 65 µA and supports a maximum output current of 12 mA, ensuring stability across various capacitive loads without external compensation components.

Feature Summary

• Provides a stable 1.225V reference voltage with high accuracy
• Operates reliably in extended industrial temperature environments
• Maintains stability under all capacitive load conditions
• Delivers low noise performance for sensitive applications

Applications

• Data acquisition systems
• Power supply monitoring circuits
• Precision audio equipment
• Battery-powered devices

Procurement Notes

Verify the specific suffix 'Q' indicates the extended temperature grade (-40°C to 125°C) compared to standard industrial grades. Confirm the package type matches the design requirements, as the TL4051 family includes multiple footprint options. Ensure the initial tolerance class aligns with system accuracy needs, as variations exist between A, B, and C grades within the same base model number.

Selection Notes

Select this component when a fixed 1.225V reference is required with strict temperature stability constraints. The B-grade tolerance offers a balance between cost and precision for general-purpose instrumentation. Consider the micropower consumption profile for battery-operated designs where minimizing quiescent current is critical for extending operational life.

Part Context

This part belongs to the TL4051 family of micropower shunt voltage references from Texas Instruments. The family provides both fixed and adjustable output options, catering to diverse precision analog circuit requirements. The Q-suffix variant specifically targets automotive and harsh industrial environments requiring wider thermal operating ranges than standard commercial parts.

Replacement Considerations

TL4051AQDBZT

FAQ

Does the TL4051BQDBZT require an output capacitor for stability?

No, the device is designed to remain stable under all capacitive load conditions without requiring an external output capacitor.

What is the initial accuracy tolerance for the B-grade version?

The B-grade version has an initial tolerance of ±0.2% at room temperature.