ADR390AUJZ-REEL7

Overview

The ADR390AUJZ-REEL7 is a micropower, low noise precision voltage reference manufactured by Analog Devices Inc. It provides a fixed output voltage of 2.048 V with an initial accuracy of ±6 mV (A grade) and a temperature coefficient of 25 ppm/°C over the operating range of −40°C to +125°C. The device operates from a supply voltage between 2.5 V and 15 V, drawing a maximum quiescent current of 120 μA. It features a shutdown mode with a supply current of 3 μA maximum and supports an output current of up to 5 mA.

Feature Summary

• Integrated shutdown pin for power management
• Low dropout design requiring minimal headroom
• Ultralow output noise performance
• No external capacitors required for stability

Applications

• Battery-powered instrumentation
• Portable medical instrumentation
• Data acquisition systems
• Industrial process controls
• Automotive applications

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and reel specifications. Confirm that the A-grade initial accuracy and temperature coefficient meet system requirements. Ensure input voltage remains within the specified 2.5 V to 15 V range during operation. Check for RoHS compliance status in the latest datasheet revision before finalizing procurement.

Selection Notes

Select this component when a stable 2.048 V reference is needed in space-constrained designs. The TSOT-23-5 package offers a compact footprint suitable for portable devices. Consider the A-grade specifications if tighter initial accuracy than B-grade is required. Evaluate the 120 μA supply current against battery life constraints for long-term deployment.

Part Context

This part belongs to the ADR39x family of micropower, low noise precision voltage references. The family includes variants with different fixed output voltages such as 2.5 V, 4.096 V, and 5 V. All members share similar architectural features including low dropout capability and integrated shutdown functionality within the same small outline package.

Replacement Considerations

ADR390B

FAQ

Does the ADR390AUJZ-REEL7 require an external capacitor for stability?

No external capacitor is required for circuit stability. However, a 0.1 μF ceramic output capacitor is recommended to handle dynamic load changes.

How does the shutdown feature operate on this device?

The device enters shutdown mode when the SHDN pin is pulled to a logic low or zero volts. In this state, the supply current drops to a maximum of 3 μA, and the output becomes high impedance.