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ADR391

PRODUCTION

2.5V Micropower, Low Noise Precision Voltage Reference with Shutdown

Data Sheet (Rev. I) Product Selection Table

Part Models: 3
1ku List Price: Starting From $1.08

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Overview

Compact 5-lead TSOT package
Low temperature coefficient
- B grade: 9 ppm/°C
- A grade: 25 ppm/°C
Initial accuracy
- B grade: ±4 mV maximum (ADR391)
- A grade: ±6 mV maximum
Ultralow output noise: 5 μV p-p (0.1 Hz to 10 Hz)

Low dropout: 300 mV
Low supply current
- 3 μA maximum in shutdown
- 140 μA maximum in operation
No external capacitor required
Output current: 5 mA
Automotive grade available
Wide temperature range: −40°C to +125°C

The ADR391/ADR392/ADR395 are precision 2.5 V, 4.096 V, and 5 V band gap voltage references, respectively, featuring low power and high precision in a tiny footprint. Using patented temperature drift curvature correction techniques from Analog Devices, Inc., the ADR39x references achieve a low 9 ppm/°C of temperature drift in the TSOT package.

The ADR39x family of micropower, low dropout voltage references provides a stable output voltage from a minimum supply of 300 mV above the output. Their advanced design eliminates the need for external capacitors, which further reduces board space and system cost. The combination of low power operation, small size, and ease of use makes the ADR39x precision voltage references ideally suited for battery-operated applications.

Applications

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

Part Models: 3
1ku List Price: Starting From $1.08

Documentation

Data Sheet 1

ADR391/ADR392/ADR395: Micropower, Low Noise Precision Voltage References with Shutdown Data Sheet (Rev.I) 10/08/2009

Application Note 1

AN-1505: Using the AD7328 8-Channel ADC in Applications with Single-Ended Industrial-Level Signals 09/03/2025

Frequently Asked Question 1

FAQ 03/14/2015

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADR391AUJZ-R2	5-Lead TSOT	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADR391AUJZ-REEL7	5-Lead TSOT	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADR391BUJZ-REEL7	5-Lead TSOT	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jul 8, 2025 - 25_0087 Qualification of Wafer Fabrication Site at Analog Devices, Inc. Camas for CBCMOS1 Products
		PCN25_0087_Form Material_Report Delta Qualification Matrix Qualification Results Summary
ADR391AUJZ-R2	PRODUCTION
ADR391AUJZ-REEL7	PRODUCTION
ADR391BUJZ-REEL7	PRODUCTION
Sep 7, 2017 - 17_0079 Qualification of TeamQuest Technology Inc., Philippines as an Alternate Test Site for TC-Vos Testing
		PCN17_0079_Form Material_Report Test Correlation Report
ADR391AUJZ-R2	PRODUCTION
ADR391BUJZ-REEL7	PRODUCTION
Jan 26, 2010 - 10_0007 Halogen Free Material Change for TSOT Products
		Material_Report PCN10_0007_Form TSOT Qualification Data
ADR391AUJZ-REEL7	PRODUCTION
ADR391BUJZ-REEL7	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
LDO Linear Regulators 1
LT3040	RECOMMENDED FOR NEW DESIGNS	20V, 200mA, Ultralow Noise, Ultrahigh PSRR Precision DAC/Reference Buffer

Parts	Product Life Cycle	Description
ADR3525	RECOMMENDED FOR NEW DESIGNS	Micropower, Precision, Auto Qualified 2.5V Voltage Reference
ADR3425	PRODUCTION	Micro-Power, High-Accuracy 2.5V Voltage Reference