REF6145IDGKR

Overview

The REF6145IDGKR is a high-precision series voltage reference from Texas Instruments, delivering a fixed output of 4.5 V with an initial accuracy of 0.05%. It features a temperature coefficient of 8 ppm/°C and operates within an input voltage range up to 5.5 V. The device includes an integrated low-output impedance buffer, supporting a maximum shunt current of 3.5 mA. Typical quiescent current is 830 µA, rising to 950 µA maximum. Noise performance includes 5 µVrms wideband noise (10 Hz–10 kHz) and 13.5 µVpp low-frequency noise (0.1–10 Hz). It functions in a temperature range of -40°C to +125°C and is housed in an 8-VSSOP package.

Feature Summary

• Integrated high-bandwidth buffer for direct ADC driving
• High precision with 0.05% initial accuracy
• Low drift characteristics at 8 ppm/°C
• Enable pin functionality for power management

Applications

• Data acquisition systems requiring stable reference voltages
• Industrial process control instrumentation
• Medical equipment signal conditioning
• Precision sensor interfaces

Procurement Notes

Verify the ordering suffix 'KR' indicates tape-and-reel packaging when sourcing components. Confirm that the specific part number matches the required 8-VSSOP package type and temperature rating. Ensure compatibility with existing PCB footprints designed for this package variant. Cross-reference the manufacturer's latest datasheet revision to confirm electrical specifications align with design requirements before finalizing procurement orders.

Selection Notes

Select this component when a buffered 4.5 V reference is needed to drive analog-to-digital converters directly without external buffering circuitry. The integrated buffer simplifies layout and reduces component count compared to unbuffered references. Consider the 8 ppm/°C drift rate against system stability requirements. The enable feature allows for power savings in battery-operated applications where periodic shutdown is feasible.

Part Context

This part belongs to the REF61xx family of high-precision voltage references from Texas Instruments. It shares architectural similarities with other members like the REF6245 but differs in temperature coefficient and buffer integration. The IDGKR suffix denotes the specific thermal grade, package style, and reel quantity configuration provided by the manufacturer.

Replacement Considerations

The REF6145IDGKT serves as a tube-packaged alternative to the REF6145IDGKR reel version. Both share identical electrical characteristics and pinouts. Verify package handling requirements during substitution planning.