REF5020IDR

Overview

The REF5020IDR is a precision series voltage reference IC manufactured by Texas Instruments, housed in an 8-pin SOIC surface-mount package. It provides a fixed output voltage of 2.048 V with an initial accuracy of ±0.05%. The device operates within an input voltage range of 2.7 V to 18 V and delivers a maximum output current of 10 mA while consuming 1.2 mA of supply current. Key performance metrics include a temperature coefficient of 3 ppm/°C, line regulation of 1 ppm/V, load regulation of 50 ppm/mA, and low-frequency noise of 6 µVpp from 0.1 Hz to 10 Hz. It functions reliably across an extended temperature range of -40°C to +125°C.

Feature Summary

• Delivers high-precision fixed voltage output with tight initial accuracy tolerance
• Features ultra-low drift characteristics suitable for demanding measurement applications
• Provides low-noise performance to ensure signal integrity in sensitive circuits

Applications

• High-resolution data acquisition systems
• Precision analog-to-digital converter (ADC) references
• Industrial process control instrumentation
• Medical diagnostic equipment requiring stable voltage sources

Procurement Notes

Verify the specific suffix 'IDR' corresponds to the tape-and-reel packaging configuration rather than tube packaging when sourcing components. Confirm that the operating environment remains within the specified -40°C to +125°C thermal limits to maintain rated accuracy. Ensure the input voltage supply stays strictly between 2.7 V and 18 V to prevent regulator dropout or overvoltage damage. Check for moisture sensitivity level requirements during storage and handling procedures.

Selection Notes

Select this component when a fixed 2.048 V reference is required with superior long-term stability compared to standard shunt types. Consider the 10 mA output capability for driving moderate loads without external buffering. Evaluate the 3 ppm/°C temperature coefficient against system thermal variations to determine if additional calibration is necessary. Compare the 1.2 mA quiescent current against power budget constraints in battery-operated designs.

Part Context

This part belongs to the REF50xx family of precision voltage references designed for high-performance applications. The REF5020 variant specifically targets systems needing a 2.048 V rail, which aligns well with binary-weighted ADC architectures. As a series reference, it utilizes a bandgap core architecture to achieve its low drift specifications. The SOIC-8 package allows for compact PCB layout in space-constrained industrial and medical devices.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.