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ADR291

PRODUCTION

Low Noise Micropower Precision Voltage Reference (2.5 V)

Data Sheet (Rev. G) Product Selection Table

Part Models: 13
1ku List Price: Starting From $3.36

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Overview

Supply Range
2.8 V to 15 V, ADR291
4.4 V to 15 V, ADR292
Supply Current 12 µA Max

Low-Noise 8 µV and 12 µV_P-P (0.1 Hz to 10 Hz)
High Output Current 5 mA
Temperature Range -40ºC to +125ºC
Pin Compatible with REF02 / REF191

The ADR291 and ADR292 are low noise, micropower precision voltage references that use an XFET^® reference circuit. The new XFET architecture offers significant performance improvements over traditional band gap and buried Zener-based references. Improvements include one quarter the voltage noise output of band gap references operating at the same current, very low and ultralinear temperature drift, low thermal hysteresis, and excellent long-term stability.

The ADR291/ADR292 family is a series of voltage references providing stable and accurate output voltages from supplies as low as 2.8 V for the ADR291. Output voltage options are 2.5 V and 4.096 V for the ADR291 and ADR292, respectively.

Quiescent current is only 12 μA, making these devices ideal for battery-powered instrumentation. Three electrical grades are available offering initial output accuracies of ±2 mV, ±3 mV, and ±6 mV maximum for the ADR291, and ±3 mV, ±4 mV, and ±6 mV maximum for the ADR292. Temperature coefficients for the three grades are 8 ppm/°C, 15 ppm/°C, and 25 ppm/°C maximum, respectively. Line regulation and load regulation are typically 30 ppm/V and 30 ppm/mA, maintaining the reference’s overall high performance. For a device with 5.0 V output, refer to the ADR293 data sheet.

The ADR291 and ADR292 references are specified over the extended industrial temperature range of −40°C to +125°C. Devices are available in the 8-lead SOIC, 8-lead TSSOP, and 3-lead TO-92 packages.

APPLICATIONS

Portable instrumentation
Precision reference for 3 V and 5 V systems
Analog-to-digital and digital-to-analog converter reference
Solar-powered applications
Loop-current-powered instruments

Part Models: 13
1ku List Price: Starting From $3.36

Documentation

Data Sheet 2

ADR291/ADR292: Low Noise Micropower 2.5 V and 4.096 V Precision Voltage References Data Sheet (Rev.F) 03/26/2010

ADR291W: Low Noise Micropower 2.5 V Precision Voltage Reference Data Sheet (Rev.G) 03/25/2010

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
ADR291ERZ	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADR291ERZ-REEL7	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADR291FRZ	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADR291FRZ-REEL	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADR291FRZ-REEL7	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADR291GRUZ	8-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADR291GRUZ-REEL7	8-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADR291GRZ	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADR291GRZ-REEL	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADR291GRZ-REEL7	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADR291GT9Z	3-Lead TO-92	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADR291WFRZ-R7	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADR291WFRZ-RL	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jul 20, 2012 - 12_0105 Halogen Free Material Change for Select SOIC Narrow and Wide Body Products Assembled at Amkor
		PCN12_0105_Form Material_Report Qualification Report Summary
ADR291ERZ	PRODUCTION
ADR291ERZ-REEL7	PRODUCTION
ADR291FRZ	PRODUCTION
ADR291FRZ-REEL	PRODUCTION
ADR291FRZ-REEL7	PRODUCTION
ADR291GRZ	PRODUCTION
ADR291GRZ-REEL	PRODUCTION
ADR291GRZ-REEL7	PRODUCTION
ADR291WFRZ-R7	PRODUCTION
ADR291WFRZ-RL	PRODUCTION
Aug 10, 2021 - 21_0035 Amkor Philippines as an Alternate Site for TSSOP_4.4
		PCN21_0035_Form Material_Report Qualification Results Summary Other
ADR291GRUZ	PRODUCTION
ADR291GRUZ-REEL7	PRODUCTION
Nov 9, 2011 - 11_0182 Test Site Transfer from Analog Devices Philippines Inc in Paranaque to Analog Devices General Trias in Cavite, Philippines
		PCN11_0182_Form Material_Report
ADR291GRUZ	PRODUCTION
ADR291GRUZ-REEL7	PRODUCTION
ADR291GT9Z	PRODUCTION
Feb 11, 2011 - 10_0005 Halogen Free Material Change for TSSOP Products Assembled at Amkor
		PCN10_0005_Form Material_Report Reliability Report
ADR291GRUZ	PRODUCTION
ADR291GRUZ-REEL7	PRODUCTION

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

Hardware Ecosystem

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