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ADR291:  Low Noise Micropower Precision Voltage Reference (2.5 V)

Product Details


Newer Alternatives: NEW DESIGNS with input voltages up to 5.5V maximum consider the ADR3425 or the ADR3525.

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

FEATURES and BENEFITS

  • 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

Pin Configuration Diagram for ADR291

Design Tools,Models,Drivers & Software

Title Content Type File Type
Voltage Reference Selection & Evaluation Wizard Design Calculators HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

Product Recommendations & Reference Designs

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Price, packaging, availability

ADR291 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADR291ERZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $6.20 $5.66 Y  Material Info PCN Purchase
ADR291ERZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $5.66 Y  Material Info PCN Purchase
ADR291FRZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $2.91 $2.56 Y  Material Info PCN Purchase
ADR291FRZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $2.56 Y  Material Info PCN Purchase
ADR291FRZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $2.56 Y  Material Info PCN Purchase
ADR291GRUZ Status: Production 8 ld TSSOP 8 Ind Tube, 96 $2.57 $2.37 Y  Material Info PCN Purchase
ADR291GRUZ-REEL7 Status: Production 8 ld TSSOP 8 Ind Reel, 1000 - $2.37 Y  Material Info PCN Purchase
ADR291GRZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $2.04 $1.82 Y  Material Info PCN Purchase
ADR291GRZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $1.82 Y  Material Info PCN Purchase
ADR291GRZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $1.82 Y  Material Info PCN Purchase
ADR291GT9Z Status: Production 3 ld TO-92 3 Ind Tray, 100 $2.58 $2.22 Y  Material Info PCN Purchase
ADR291WFRZ-R7 Status: Production SOIC 150 MIL 8 Auto Reel, 1000 - $3.20 Y  Material Info PCN Purchase
ADR291WFRZ-RL Status: Production SOIC 150 MIL 8 Auto Reel, 2500 - $3.20 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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