ADR390BUJZ-REEL7

Overview

The ADR390BUJZ-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 B grade initial accuracy of ±4 mV maximum and a temperature coefficient of 9 ppm/°C. The device operates within an input voltage range of 2.5 V to 15 V and supports a maximum output current of 5 mA. Quiescent current is 120 μA in operation and drops to 3 μA maximum in shutdown mode. It features ultralow output noise of 5 μV p-p from 0.1 Hz to 10 Hz and requires no external capacitor for stability.

Feature Summary

• Patented curvature correction techniques achieve low temperature drift of 9 ppm/°C across the operating range.
• Advanced design eliminates the need for external capacitors, reducing board space and system cost.
• Includes a shutdown feature compatible with TTL/CMOS logic levels to minimize power consumption.

Applications

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

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and reel specifications. Confirm that the component matches the required B grade accuracy and temperature coefficient parameters for your application. Ensure compatibility with the intended supply voltage range and load requirements before procurement.

Selection Notes

Select this component when a stable 2.048 V reference is needed with minimal quiescent current consumption. The absence of external capacitor requirements simplifies layout and reduces bill of materials. Consider the shutdown capability if power management during idle periods is critical for the system design.

Part Context

This part belongs to the ADR39x family of micropower, low dropout voltage references, which also includes models providing 2.5 V, 4.096 V, and 5 V outputs. All members share similar architectural features, including low noise performance and compact TSOT packaging, designed for high precision in small form factors.

Replacement Considerations

Other members of the ADR39x family may serve as alternatives if different output voltages are acceptable. Verify pinout compatibility and thermal resistance characteristics when substituting components to ensure reliable operation under existing circuit conditions.

FAQ

Does the ADR390BUJZ-REEL7 require an external output capacitor?

No, the advanced design of the ADR39x family eliminates the need for external capacitors for circuit stability, although a 0.1 μF ceramic capacitor is recommended for dynamic loads.

How does the shutdown pin function on this device?

Applying a logic low or zero volts to the SHDN pin turns the device off, placing the output in a high impedance state and reducing supply current to a maximum of 3 μA.