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

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 ...More

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

Product Description

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

  • 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

Diagrams

ADR291 Diagram
Pin Configuration Diagram for ADR291

Specifications

Vout 2.5
Initial Accuracy (%) 0.08
Ref Out TC (ppm/C) 3ppm/C
Supply Voltage Range (V) +3 to +15
Supply Current (max) 12µA
Ref Output Current (mA) 5mA
0.1-10 Hz Noise (µV p-p) 8µV p-p
Temp Range(s) -40 to +125
Package SOIC,TSSOP
Reference Type Series-Low Dropout

ADR01 - Ultracompact, Precision 10.0 V Voltage References

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Part# Vout Initial Accuracy (%) Ref Out TC (ppm/C) 0.1-10 Hz Noise (µV p-p) Ref Output Current (mA) Supply Voltage Range (V) Temp Range(s) Supply Current (max) Reference Type Package Price* (1000-4999) Product Description
ADR130 +0.5/+1 Pin Programmable 0.35 5 3 4 2V to 18V -40 to +125 150µA Series TSOT $0.91 Precision, Sub-Band Gap, Series Voltage Reference
AD584 +2.5/+5/+7.5/+10 Prog 0.05 5 50 10 +4.5 to +30 -55 to +125, 0 to +70 1mA Series-Multi/Select Out DIP, TO-92 $3.01 10.000 V, 7.500 V, 5.000 V and 2.500 V, Pin Programmable Precision Voltage Reference
ADR510 1.0 0.35 70 4 n/a n/a, shunt ref -40 to +85 n/a Shunt SOT23 $0.59 1.0 V Precision, Low Noise, Shunt Voltage Reference
AD1580 1.2 0.08 50 5 n/a n/a, shunt ref -40 to +85 n/a Shunt SC70, SOT23 $0.60 1.2 V Micropower, Precision Shunt Voltage Reference
ADR512 1.2 0.3 60 4 n/a n/a shunt ref -40 to +85 n/a Shunt SOT23 $0.59 1.2 V Precision, Low Noise Shunt Voltage Reference
ADR280 1.2 0.4 5 2.2 100 +2.4 to +5.5 -40 to +85 16µA Series SC70, SOT23 $0.75 1.20 V, Low Noise, Low Power, High PSRR, Precision Voltage Reference
AD589 1.2 1.2 10 5 n/a n/a, Shunt Type Reference -55 to +125, 0 to +70 50µA Shunt Metal Can, SOIC $1.31 Two-Terminal IC 1.2 V Shunt Reference
ADR1581 1.25 0.12 50 4.5 n/a n/a, shunt ref -40 to +85 n/a Shunt SOT23 $0.60 1.25 V Micropower, Precision Shunt Voltage Reference
ADR127 1.25 0.12 3 5 5 +2.7 to +18 -40 to +125 125µA Series TSOT $0.91 1.25V, Precision Micropower LDO Voltage Reference
ADR827 1.25 0.4 15 8 5 +2.7V to +15V -40 to +125 400µA Series MSOP $1.10 Low Power, Precision Reference and Op Amp
ADR1500 1.2875 0.2 170 5 n/a n/a, shunt reference -40 to +85 n/a Shunt SC70 $1.02 1.2875 V Micropower, Shunt Voltage Reference
ADR318 1.8 0.27 5 5 5 +2.4 to +15 0 to +70 120µA Series-Low Dropout SOT23 $0.81 1.8 V Precision Voltage Reference
AD588 10 0.01 1.5 6 10 Vdd-Vss = (Vout+2) to +36 -25 to +85, 0 to +70 10mA Series-Multi/Select Out DIP $15.03 +10 V, +5 V, ±5 V tracking, −5 V, −10 V, High Precision Voltage Reference
AD688 10 0.02 1.5 6 10 Vdd-Vss = (Vout+2) to 36 -40 to +85, -55 to +125 12mA Series-Multi/Select Out DIP, SOIC $9.08 High Precision ±10 V Reference
AD581 10 0.05 5 40 10 +12 to +30 -55 to +125, 0 to +70 1mA Series TO-52 $4.09 High Precision 10 V IC Reference
AD587 10 0.05 5 4 10 +13.5 to +36 -55 to +125, 0 to +70 4mA Series DIP, SOIC $2.52 High Precision 10 V Reference
ADR01 10 0.05 3 20 10 +12 to +40 -40 to +125, 0 to +70 1mA Series SC70, SOIC, TSOT $0.99 Ultra-Compact, Precision 10V Voltage Reference
REF01 10 0.3 3 30 10 +12 to +40 -40 to +85, -55 to +125 1.4mA Series DIP, SOIC, TO-99 $1.20 +10V Precision Voltage Reference
ADR440 2.048 0.05 1 1 10 +3 to +18 -40 to +125 3.75mA Series-Low Dropout DIP, MSOP, SOIC $2.50 2.048 V, Ultralow Noise, LDO XFET® Voltage Reference with +10/-5 mA Output Current Capability
ADR420 2.048 0.05 1 1.75 10 +4.0 to +18 -40 to +125 500µA Series MSOP, SOIC $2.79 2.048 V XFET® Voltage Reference
ADR430 2.048 0.05 1 3.5 30 +4.1 to +18 -40 to +125 800µA Series MSOP, SOIC $2.92 2.048 V High Precision, Low Noise XFET® Reference with Output Sink and Source Capability
ADR5040 2.048 0.1 10 - n/a n/a, is shunt ref -40 to +125 n/a Shunt SC70, SOT23 $0.30 Precision Micropower Shunt Mode Voltage Reference, 2.048 V Output
REF191 2.048 0.1 2 20 30 +2.3 to +15 -40 to +85 45µA Series-Low Dropout DIP, SOIC $1.36 2.048, Precision Micropower, Low Dropout, Low Voltage Reference
ADR360 2.048 0.15 9 6.8 5 +2.35 to +15 -40 to +125 190µA Series-Low Dropout TSOT $0.77 Low Power, Low Noise Voltage Reference w/ Sink/Source Capability, 2.048 VOUT
ADR390 2.048 0.19 9 5 5 +2.5 to +15 -40 to +125 120µA Series-Low Dropout TSOT $0.77 2.048 V Micropower, Low Noise Precision Voltage Reference with Shutdown
ADR370 2.048 0.2 30 70 5 +2.3 to +15 -40 to +125 72µA Series-Low Dropout SOT23 $0.74 2.048 V Tiny Package Precision Reference
ADR520 2.048 0.2 40 14 n/a n/a, shunt reference -40 to +85 50µA Shunt SC70, SOT23 $0.47 2.048 V High Performance, Low Noise Shunt Reference
ADR380 2.048 0.24 5 5 5 +2.4 to +18 -40 to +85 120µA Series-Low Dropout SOT23 $0.75 2.048 V Bandgap Voltage Reference
REF43 2.5 0.02 25 4 20 +4.5 to +40 -40 to +85 450µA Series DIP, SOIC $3.65 +2.5V Low Power Precision Voltage Reference
AD780 2.5 0.04 3 4 10 +4 to +36 -40 to +85 1mA Series-Multi/Select Out DIP, SOIC $3.61 2.5 V/3.0 V Ultrahigh Precision Bandgap Voltage Reference
ADR441 2.5 0.04 1 1.2 10 +3 to +18 -40 to +125 3.75mA Series-Low Dropout DIP, MSOP, SOIC $2.50 2.5 V, Ultralow Noise, LDO XFET® Voltage Reference with +10/-5 mA Output Current Capability
ADR431 2.5 0.04 1 3.5 30 +4.5 to +18 -40 to +125 800µA Series MSOP, SOIC $2.92 2.5 V High Precision, Low Noise XFET® Reference with Output Sink and Source Capability
ADR421 2.5 0.04 1 1.75 10 +4.5 to +18 -40 to +125 500µA Series MSOP, SOIC $2.79 2.5 V XFET® Voltage Reference
AD1582 2.5 0.08 50 70 5 +2.7 to +12 -40 to +125 70µA Series-Low Dropout SOT23 $0.60 2.5V Micropower, Precision Series Mode Voltage Reference
ADR291 2.5 0.08 3 8 5 +3 to +15 -40 to +125 12µA Series-Low Dropout SOIC, TSSOP $1.76 Precision, Micropower 2.5 V XFET™ Reference
REF192 2.5 0.08 2 25 30 +2.6 to +15 -40 to +85 45µA Series-Low Dropout DIP, SOIC, TSSOP $1.36 Precision Micropower, Low Dropout, Low Voltage References, Nom. Vo=2.50 V
ADR5041 2.5 0.1 10 - n/a n/a, shunt ref -40 to +125 n/a Shunt SC70, SOT23 $0.30 Precision, Micropower, Shunt Mode Voltage Reference, Vout = 2.5V
ADR03 2.5 0.1 3 10 10 +4.5 to +40 -40 to +125 1mA Series SC70, SOIC, TSOT $1.02 Ultra-Compact, Precision 2.5 V Voltage Reference
ADR121 2.5 0.12 3 10 5 +2.8 to +18 -40 to +125 125µA Series-Low Dropout TSOT $0.91 2.5V, Precision Micropower LDO Voltage Reference
ADR361 2.5 0.12 9 8.25 5 +2.8 to +15 -40 to +125 190µA Series-Low Dropout TSOT $0.77 Low Power, Low Noise Voltage Reference w/ Sink/Source Capability, 2.5 Vout
ADR391 2.5 0.16 9 5 5 +2.8 to +18 -40 to +125 120µA Series-Low Dropout TSOT $0.77 2.5V Micropower, Low Noise Precision Voltage Reference with Shutdown
ADR821 2.5 0.2 15 16 5 +2.8V to +15V -40 to +125 400µA Series MSOP $1.10 Low Power, Precision Reference and Op Amp
AD680 2.5 0.2 20 8 10 +4.5 to +36 -40 to +85, 0 to +70 250µA Series DIP, SOIC, TO-92 $1.74 2.5V, Low Power Bandgap Reference
ADR525 2.5 0.2 40 18 n/a n/a, shunt reference -40 to +85 50µA Shunt SC70, SOT23 $0.47 2.5 V High Performance, Low Noise Shunt Reference
REF03 2.5 0.2 10 6 20 +4.5 to +33 -40 to +85 1.4mA Series DIP, SOIC $1.20 Precision Voltage Reference Providing Stable +2.5 V Output
ADR381 2.5 0.24 3 5 5 +2.8 to +18 -40 to +85 120µA Series-Low Dropout SOT23 $0.75 2.5 V Bandgap Voltage Reference
AD580 2.5 0.4 10 8 10 +4.5 to +30 -55 to +125, 0 to +70 1.5mA Series TO-52 $2.64 High Precision 2.5 V IC Reference
ADR443 3 0.04 1 1.4 10 +3.5 to +18 -40 to +125 3.75mA Series-Low Dropout MSOP, SOIC $2.50 3.0 V High Precision, LDO XFET® Reference for High Performance Sigma-Delta Converters
ADR423 3 0.04 1 1 10 +5.0 to +18 -40 to +125 500µA Series MSOP, SOIC $2.79 3.0V XFET® Voltage Reference
ADR433 3 0.05 1 3.75 30 +5.0 to +18 -40 to +125 800µA Series MSOP, SOIC $2.92 3.0 V High Precision, Low Noise XFET® Reference with Output Sink and Source Capability
ADR5043 3 0.1 10 - n/a n/a, shunt REF -40 to +125 n/a Shunt SC70, SOT23 $0.30 Precision, Micropower, Shunt Mode Voltage Reference (3.0 Vout)
ADR363 3 0.1 9 8.7 5 +3.3 to +15 -40 to +125 190µA Series-Low Dropout TSOT $0.77 Low Power, Low Noise Voltage Reference w/ Sink/Source Capability, 3.0 Vout
ADR06 3 0.1 3 10 10 +5 to +40 -40 to +125 0.65mA Series SC70, SOIC, TSOT $1.02 Ultracompact, Precision 3 V Voltage Reference
AD1583 3 0.1 50 85 5 +3.2 to +12 -40 to +125 70µA Series-Low Dropout SOT23 $0.60 3.0V Micropower, Precision Series Mode Voltage Reference
ADR530 3 0.2 40 22 n/a n/a, shunt ref -40 to +85 50µA Shunt SC70, SOT23 $0.47 3.0 V High Performance, Low Noise Shunt Reference
REF193 3 0.33 10 30 30 +3.2 to +15 -40 to +85 45µA Series-Low Dropout SOIC $1.36 Precision Micropower, Low Dropout, Low Voltage Reference, Nom. Vo=3.0 V
ADR366 3.3 0.125 9 9.3 5 +3.6 to +15 -40 to +125 190µA Series-Low Dropout TSOT $0.77 Low Power, Low Noise Voltage Reference w/ Sink/Source Capability, 3.3 Vout
REF196 3.3 0.3 10 33 30 +3.4 to +15 -40 to +85 45µA Series-Low Dropout SOIC, TSSOP $1.36 Precision Micropower, Low Dropout, Low Voltage References, Nom. Vo = 3.3 V
ADR444 4.096 0.04 1 1.8 10 +4.6 to +18 -40 to +125 3.75mA Series-Low Dropout MSOP, SOIC $2.50 4.096 V High Precision, LDO XFET® Reference for use with High Performance Sigma-Delta Converters
ADR434 4.096 0.04 1 6.25 30 +6.1 to +18 -40 to +125 800µA Series MSOP, SOIC $2.92 4.096 V, High Precision, Low Noise XFET® Reference with Output Sink and Source Capability
REF198 4.096 0.05 2 40 30 +3.4 to +15 -40 to +85 45µA Series-Low Dropout DIP, SOIC, TSSOP $1.36 Precision Micropower, Low Dropout, Low Voltage References, Nom. Vo = 4.096 V
ADR292 4.096 0.07 3 12 5 +4.5 to +18 -40 to +125 12µA Series SOIC, TSSOP $1.76 Precision, Micropower 4.096 V XFET™ Reference
ADR5044 4.096 0.1 10 - n/a n/a, shunt REF -40 to +125 n/a Shunt SC70, SOT23 $0.30 Precision, Micropower ,Shunt Mode Voltage Reference (4.096 Vout)
ADR364 4.096 0.1 9 11 5 +4.4 to +15 -40 to +125 190µA Series-Low Dropout TSOT $0.77 Low Power, Low Noise Voltage Reference w/ Sink/Source Capability, 4.096 VOUT
AD1584 4.096 0.1 50 110 5 +4.3 to +12 -40 to +125 70µA Series-Low Dropout SOT23 $0.60 4.096V, Micropower, Precision Series Mode Voltage Reference
ADR392 4.096 0.12 9 7 5 +4.3 to +15 -40 to +125 120µA Series-Low Dropout TSOT $0.77 4.096 V Micropower, Low Noise Precision Voltage Reference with Shutdown
ADR540 4.096 0.2 40 30 n/a n/a, shunt ref -40 to +85 50µA Shunt SC70, SOT23 $0.47 4.096 V High Performance, Low Noise Shunt Reference
ADR439 4.5 0.04 1 7.5 30 +6.5 to +18 -40 to +125 800µA Series MSOP, SOIC $2.92 4.5 V High Precision, Low Noise XFET® Reference with Output Sink and Source Capability
REF194 4.5 0.044 2 45 30 +4.6 to +15 -40 to +85 45µA Series-Low Dropout DIP, SOIC $1.36 Precision Micropower, Low Dropout, Low Voltage References, Nom. Vo = 4.5 V
ADR445 5 0.04 1 2.25 10 +5.5 to +18 -40 to +125 3.75mA Series-Low Dropout MSOP, SOIC $2.50 5.0 V High Precision, LDO XFET® Reference for use with High Performance Sigma-Delta Converters
ADR435 5 0.04 1 8 30 +7.0 to +18 -40 to +125 800µA Series MSOP, SOIC $2.92 5.0 V High Precision, Low Noise XFET® Reference with Output Sink and Source Capability
ADR425 5 0.04 1 3.4 10 +7.0 to +18 -40 to +125 500µA Series MSOP, SOIC $2.79 5.0V XFET® Voltage Reference
AD586 5 0.04 2 4 10 +10.8 to +36 -55 to +125, 0 to +70 3mA Series DIP, SOIC $2.75 High Precision 5 V Reference
ADR02 5 0.06 3 10 10 +7.0 to +40 -40 to +125, 0 to +70 1mA Series SC70, SOIC, SOT23, TSOT $1.02 Ultra-Compact, Precision +5.0 V Reference
ADR293 5 0.06 3 15 5 +6.0 to +15 -40 to +125 15µA Series SOIC, TSSOP $1.76 Low Noise Micropower Precision Voltage 5.0 V Reference
ADR365 5 0.08 9 12.8 5 +5.3 to +15 -40 to +125 190µA Series-Low Dropout TSOT $0.77 Low Power, Low Noise Voltage Reference w/ Sink/Source Capability, 5.0 VOUT
ADR5045 5 0.1 n/a - n/a n/a, Shunt REF -40 to +125 n/a Shunt SC70, SOT23 $0.30 Precision, Micropower, Shunt Mode Voltage Reference (5.0 Vout)
AD1585 5 0.1 50 140 5 +5.2 to +12 -40 to +125 70µA Series-Low Dropout SOT23 $0.60 5V, Micropower, Precision, Series-Mode, Low Dropout Voltage Reference
ADR395 5 0.1 9 8 5 +5.3 to +15 -40 to +125 120µA Series-Low Dropout TSOT $0.77 5.0 V Micropower, Low Noise Precision Voltage Reference with Shutdown
ADR125 5 0.12 3 20 5 +5.3 to +18 -40 to +125 125µA Series-Low Dropout TSOT $0.91 5V, Precision Micropower LDO Voltage Reference
REF02 5 0.15 3 10 10 +7.0 to +40 -40 to +85, -55 to +125, 0 to +70 1.4mA Series DIP, SOIC, TO-99 $1.20 +5V Precision Voltage Reference/Temperature Transducer
REF195 5 0.2 2 50 30 +5.1 to +15 -40 to +85 45µA Series-Low Dropout DIP, SOIC, TSSOP $1.24 Precision Micropower, Low Dropout, Low Voltage References, Nom. Vo = 5 V
ADR550 5 0.2 40 38 n/a n/a, shunt reference -40 to +85 50µA Shunt SC70, SOT23 $0.47 5.0 V High Performance, Low Noise Shunt Reference
Sorted by Reference Output Voltage (Ascending) and Accuracy (Ascending)

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

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  • Pre-Release: The model has not been released to general production, but samples may be available.
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The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

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Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

Temperature Range
This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
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