REF3040AIDBZR

Overview

The REF3040AIDBZR is a precision series voltage reference IC from Texas Instruments, housed in a compact SOT-23-3 package. It delivers a fixed output voltage of 4.096V with an initial accuracy of ±0.2%. The device operates within an input voltage range of 4.146V to 5.5V and draws a typical supply current of 42µA, with a maximum of 50µA. It supports a maximum load current of 25mA and features a temperature coefficient of 75ppm/°C across the industrial operating range of -40°C to +125°C.

Feature Summary

• Ultra-low dropout operation requiring only 1mV headroom above the output voltage under zero-load conditions.
• Intrinsic safety compatibility due to stability without the need for external load capacitors.
• High precision performance characterized by tight initial accuracy and low temperature drift.
• Compact surface-mount packaging suitable for space-constrained portable and battery-powered designs.

Applications

• Loop-powered industrial sensors such as pressure and temperature transmitters
• Portable and battery-operated instrumentation equipment
• Data acquisition systems requiring stable reference voltages
• Medical devices and diagnostic equipment

Procurement Notes

Verify the specific suffix 'A' indicates the ±0.2% accuracy grade and 'I' denotes the industrial temperature range. Confirm the 'DBZR' suffix corresponds to the SOT-23-3 package and tape-and-reel delivery format. Ensure the component matches the RoHS3 compliance status and check for any recent product change notices regarding manufacturing sites or material composition updates before finalizing procurement.

Selection Notes

Select this component when a fixed 4.096V reference is required with high precision in a minimal footprint. It is ideal for applications where power consumption must be minimized, such as battery-operated devices. Consider the 25mA output capability if driving moderate loads directly. Verify that the input voltage remains within the specified range to maintain regulation and ensure the thermal environment stays within the -40°C to +125°C operational limits.

Part Context

This part belongs to the REF30xx family of precision voltage references designed for low-power applications. The series offers various fixed output voltages and accuracy grades, all sharing the same low quiescent current and small SOT-23-3 form factor. The REF3040 variant specifically targets applications needing a 4.096V reference, commonly used in ADC/DAC circuits and sensor interfaces where stability and low noise are critical.

Replacement Considerations

The REF3040AIDBZRG4 is a lead-free version of this component. Check datasheets for pinout and electrical parameter compatibility when substituting with other series references from different manufacturers.