REF6145IDGKT

Overview

The REF6145IDGKT is a high-precision voltage reference from Texas Instruments featuring an integrated high-bandwidth buffer. It delivers a fixed output voltage of 4.5V with an initial accuracy of 0.05% and a maximum temperature coefficient of 8ppm/°C. The device operates within a supply voltage range of 4.75V to 5.5V, drawing a typical quiescent current of 830µA and supporting a maximum output current of 3.5mA. It exhibits low noise characteristics, specified at 5µVrms wideband (10Hz–10kHz) and 13.5µVpp low-frequency noise (0.1Hz–10Hz). The component is housed in an 8-pin VSSOP package and supports an operating temperature range from -40°C to 125°C.

Feature Summary

• Integrated low output impedance buffer for enhanced drive capability
• High precision performance with low temperature drift
• Low noise operation suitable for sensitive analog circuits
• Shutdown mode for reduced power consumption

Applications

• Data acquisition systems requiring stable reference voltages
• Industrial process control instrumentation
• Medical equipment signal conditioning
• Precision analog-to-digital converter references

Procurement Notes

Verify the specific suffix IDGKT corresponds to the 8-VSSOP package and tape-and-reel delivery format. Confirm that the thermal performance and pinout align with the target PCB layout constraints. Ensure the operating environment remains within the specified -40°C to 125°C range to maintain the guaranteed 8ppm/°C temperature coefficient and 0.05% initial accuracy specifications.

Selection Notes

Select this component when a buffered output is required to eliminate loading effects on the reference core. It is appropriate for designs needing higher output current than unbuffered counterparts while maintaining tight accuracy. Consider the 830µA quiescent current against system power budgets. Compare noise specifications against other series references if ultra-low noise is critical for the application.

Part Context

This part belongs to the REF61xx family of high-precision voltage references from Texas Instruments. The family distinguishes itself by integrating a high-bandwidth buffer directly onto the silicon, simplifying design complexity. The REF6145 variant specifically provides a 4.5V output, complementing other options like the 2.5V or 5V variants within the same series.

Replacement Considerations

Check for direct cross-reference availability in the REF61xx series for different output voltages. Verify compatibility with legacy REF50xx series if buffer integration is not strictly required, noting differences in input voltage ranges and package types.