REF3140AIDBZR

Overview

The REF3140AIDBZR is a precision series voltage reference from Texas Instruments, delivering a fixed output of 4.096 V. It features an initial accuracy of ±0.2% and a temperature coefficient of 20 ppm/°C. The device operates within an input voltage range of 4.146 V to 5.5 V and draws a supply current of 135 µA. It supports a maximum shunt current of 10 mA and functions reliably across a temperature range of -40°C to +125°C. Packaged in a compact SOT-23-3 surface-mount case, it exhibits noise levels of 53 µVp-p (0.1 Hz to 10 Hz) and 78 µVrms (10 Hz to 10 kHz).

Feature Summary

• Ultra-low dropout operation requiring only 1 mV headroom for stable regulation.
• Inherently stable without the need for external load capacitors.
• High precision with tight initial accuracy and low temperature drift specifications.

Applications

• Portable and battery-powered instrumentation systems.
• Loop-powered industrial sensors and transmitters.
• Data acquisition systems requiring high-resolution analog-to-digital conversion.
• Medical equipment and portable diagnostic devices.

Procurement Notes

Verify the specific suffix 'DBZR' against the manufacturer's latest datasheet to confirm package type and tape-and-reel configuration. Ensure compatibility with RoHS3 standards if required by your manufacturing process. Cross-reference the lead time and lifecycle status directly with Texas Instruments or authorized distributors, as availability may vary based on production cycles.

Selection Notes

Select this component when a fixed 4.096 V reference is needed with high precision and low power consumption. It is suitable for applications where space is limited due to its small SOT-23-3 footprint. Consider the 135 µA supply current and 10 mA output capability against system requirements. Compare with the REF3140AIDBZTG4 if different packaging options are preferred.

Part Context

This part belongs to the REF31xx family of precision voltage references, designed for low-power, high-accuracy applications. It shares architectural similarities with other members like the REF3040 and REF3130 but offers specific trade-offs in current consumption and drift characteristics. The REF3140 series is optimized for battery-operated devices where long life and stability are critical.

Replacement Considerations

The REF3140AIDBZTG4 is a verified substitute offering identical electrical performance in a different packaging format. Other REF31xx variants may serve as functional alternatives if their specific accuracy or current specs align with the design requirements.