TL4051B12QDCKT

Overview

The TL4051B12QDCKT is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 1.225V with an initial accuracy of ±0.2%. The device operates within an extended industrial temperature range of -40°C to +125°C and utilizes a compact SC-70-5 surface-mount package. It requires a minimum operating current of 60µA (typical) and supports a maximum cathode current of 12mA. The unit features low dynamic impedance, low noise, and a temperature coefficient of 50ppm/°C, ensuring stable performance across wide load variations without requiring external capacitors.

Feature Summary

• Provides a fixed 1.225V output with high initial accuracy
• Operates stably under all capacitive load conditions without external compensation
• Delivers low noise and low temperature coefficient for precision applications
• Supports extended industrial temperature range from -40°C to +125°C

Applications

• Data acquisition systems
• Portable instrumentation
• Battery-powered equipment
• Process control systems

Procurement Notes

Verify the specific suffix 'Q' indicates the extended temperature grade (-40°C to +125°C) and 'B' denotes the ±0.2% tolerance class. Confirm the 'DCK' package corresponds to the SC-70-5 form factor. Ensure the 'T' suffix matches the required tape-and-reel packaging configuration for automated assembly processes.

Selection Notes

Select this component when a fixed 1.225V reference is required in space-constrained designs. It is suitable for applications demanding stability under varying capacitive loads without additional components. Consider the ±0.2% accuracy and 50ppm/°C drift for precision measurement circuits where standard commercial grade parts may not suffice.

Part Context

This part belongs to the TL4051 family of micropower shunt voltage references. The family offers both fixed and adjustable output options in small packages like SOT-23 and SC-70. The TL4051 series is designed to replace larger, higher-power references in portable and battery-operated devices while maintaining high precision and low power consumption characteristics.

Replacement Considerations

Compatible substitutes include other TL4051 variants with matching tolerance and temperature grades, such as TL4051B12IDCKR or TL4051B12QDCKR, provided the package and electrical specifications align with the design requirements.