REF5040IDGKR

Overview

The REF5040IDGKR is a fixed series voltage reference IC from Texas Instruments, providing a nominal output of 4.096 V. It features an initial accuracy of ±0.05% and a temperature coefficient of 3 ppm/°C. The device operates within an input voltage range of 3.2 V to 18 V and supports a maximum load current of 10 mA. It consumes 1.2 mA of supply current and functions across a temperature range of -40°C to +125°C. Packaged in an 8-VSSOP housing, it offers low noise performance with a peak-to-peak value of 9 µVpp over the 0.1 Hz to 10 Hz frequency band.

Feature Summary

• Delivers high precision with an initial accuracy of ±0.05% and a low temperature coefficient of 3 ppm/°C for stable reference voltages.
• Features low noise characteristics, ensuring signal integrity in sensitive analog applications through minimal low-frequency fluctuations.
• Supports wide input voltage operation up to 18 V, allowing flexibility in power supply design while maintaining regulation.

Applications

• High-resolution data acquisition systems requiring precise voltage references for ADC excitation.
• Industrial process control instrumentation where long-term stability and low drift are critical.
• Medical equipment utilizing accurate sensing circuits that depend on stable reference potentials.

Procurement Notes

Verify the specific suffix IDGKR corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm the manufacturer is Texas Instruments to ensure authenticity and access to official documentation. Check for RoHS compliance status if environmental regulations apply to your manufacturing region. Ensure the operating temperature range meets your system's thermal requirements.

Selection Notes

Select this component when a 4.096 V output is specifically needed with tight tolerance requirements. Consider the 8-VSSOP package size constraints against available PCB real estate. Evaluate the 10 mA load capability against the total current demand of the connected circuitry. Compare the 3 ppm/°C drift against alternative references if extreme thermal stability is not required.

Part Context

This part belongs to the REF50xx family of precision voltage references designed for demanding applications. It complements other variants like the REF5030 and REF5050 by offering a standard 4.096 V output level. The series is engineered to provide superior performance compared to older generation references, focusing on low noise and high accuracy.

Replacement Considerations

Direct substitutes include REF5040AIDGKR or REF5040IDG4, which share identical electrical specifications but may differ in packaging type such as tube versus reel. Verify pin compatibility and thermal characteristics before substitution.