TL4051C12IDCKR

Overview

The TL4051C12IDCKR is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 1.225V with an initial accuracy tolerance of ±0.5%. The device operates within an extended temperature range of -40°C to +125°C and features a low temperature coefficient of 50 ppm/°C. Packaged in the compact SC-70-5 (SOT-353) surface-mount format, it requires a minimum cathode current of approximately 65 µA for regulation. The maximum output current capability is 12 mA, supporting stable operation across a wide load range without external compensation capacitors.

Feature Summary

• Fixed 1.225V output with ±0.5% initial accuracy
• Low temperature coefficient of 50 ppm/°C
• Micropower operation with minimal quiescent current
• Stable under all capacitive loads without external components

Applications

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

Procurement Notes

Verify the specific suffix IDCKR corresponds to the SC-70-5 package and standard tape-and-reel delivery format. Confirm that the C-grade designation aligns with the required ±0.5% initial accuracy specification for the target application. Ensure the operating environment remains within the specified -40°C to +125°C thermal limits to maintain performance integrity.

Selection Notes

Select this component when a fixed 1.225V reference is required in space-constrained designs utilizing SC-70-5 packaging. The C-grade tolerance suits applications where moderate precision is acceptable. Consider the 50 ppm/°C drift if high thermal stability is critical. This part is suitable for general-purpose references where ultra-low noise or higher precision grades are not mandatory.

Part Context

This device belongs to the TL4051 family of micropower shunt voltage references from Texas Instruments. The family offers various output voltages and accuracy grades, including adjustable options via external resistors. The TL4051 series is designed for low-cost, high-volume applications requiring reliable voltage referencing in compact form factors, serving as a robust alternative to more complex reference solutions.

Replacement Considerations

The TL4051C12IDBZR serves as a pin-compatible replacement offering the same electrical characteristics but housed in a SOT-23-3 package instead of SC-70-5. Designers must verify footprint compatibility during substitution. Other TL4051 variants with different output voltages or accuracy grades may also be considered if specifications allow.