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ADR280:  1.2 V Ultralow Power High PSRR Voltage Reference

The ADR280 is a 1.2 V band gap core reference with excellent line regulation and power supply rejection designed specifically for applications experiencing heavy dynamic supply variations, such as data converter references in GSM, GPRS, and 3G mobile station applications. Devices such as the AD6535 that have an analog baseband IC with on-board baseband, audio codecs, voltage regulators, and ...More

ADR280:  1.2 V Ultralow Power High PSRR Voltage Reference

Product Description

The ADR280 is a 1.2 V band gap core reference with excellent line regulation and power supply rejection designed specifically for applications experiencing heavy dynamic supply variations, such as data converter references in GSM, GPRS, and 3G mobile station applications. Devices such as the AD6535 that have an analog baseband IC with on-board baseband, audio codecs, voltage regulators, and battery chargers rely on the ability of the ADR280 to reject input battery voltage variations during RF power amplifier activity.

In addition to mobile stations, the ADR280 is suitable for a variety of general-purpose applications. Most band gap refer-ences include internal gain for specific outputs, which simplifies the user’s design, but compromises on the cost, form factor, and flexibility. The ADR280, on the other hand, optimizes the band gap core voltage and allows users to tailor the voltage, current, or transient response by simply adding their preferred op amps.

The ADR280 operates on a wide supply voltage range from 2.4 V to 5.5 V. It is available in compact 3-lead SOT-23 and SC70 packages. The device is specified over the extended indus-trial temperature range of −40°C to +85°C.

Applications

  • List GSM, GPRS, 3G mobile stations
  • Portable battery-operated electronics
  • Low voltage converter references
  • Wireless devices

    • Data Sheet, Rev. C, 4/07

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    • 1.2 V precision output
    • Excellent line regulation: 2 ppm/V typical
    • High power supply ripple rejection: –80 dB at 220 Hz
    • Ultralow power supply current: 16 μA maximum
    • Temperature coefficient: 40 ppm/°C maximum
    • Low noise, 12.5 nV/√Hz typical
    • Operating supply range, 2.4 V to 5.5 V
    • Compact 3-lead SOT-23 and SC70 packages
    • Vout: 1.2
    • Initial Accuracy (%): 0.4
    • Ref Out TC (ppm/C): 5ppm/C
    • Supply Voltage Range (V): +2.4 to +5.5
    • Supply Current : 16µA
    • Ref Output Current (mA): 100µA
    • 0.1-10 Hz Noise (µV p-p): 2.2µV p-p
    • Temp Range(s): -40 to +85
    • Package: SC70,SOT23
    • Reference Type: Series

    Pin Configuration Diagram for ADR280

    Circuits from the Lab

    Find more at our Circuits Library.

    Of Note ...

    Essential companion part for AD6535 for handset applications. It also can be used as a general purpose part where low noise and low power reference is needed. Its tiny SC70 package makes it ideal for hand held devices applications.

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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 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 $0.92 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 $3.05 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 $0.60 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 $0.61 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 $0.60 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 $0.76 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 $1.33 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 $0.61 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 $0.92 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 $1.11 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 $1.03 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 $0.82 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 $15.21 +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 $9.19 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 $4.14 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 $2.55 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 $1.00 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 $1.21 +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 $2.53 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 $2.82 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 $2.96 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 $1.38 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 $0.78 Low Power, Low Noise Voltage Reference w/ Sink/Source Capability, 2.048 VOUT
    ADR370 2.048 0.2 30 70 5 +2.3 to +15 -40 to +125 72µA Series-Low Dropout SOT23 $0.75 2.048 V Tiny Package Precision Reference
    ADR380 2.048 0.24 5 5 5 +2.4 to +18 -40 to +85 120µA Series-Low Dropout SOT23 $0.76 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 $3.69 +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 $3.65 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 $2.53 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 $2.96 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 $2.82 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 $0.61 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 $1.78 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 $1.38 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 $1.03 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 $0.92 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 $0.78 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 $0.78 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 $1.11 Low Power, Precision Reference and Op Amp
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    ADR525 2.5 0.2 40 18 n/a n/a, shunt reference -40 to +85 50µA Shunt SC70, SOT23 $0.48 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 $1.21 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 $0.76 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 $2.67 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 $2.53 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 $2.82 3.0V XFET® Voltage Reference
    ADR433 3 0.05 1 3.75 30 +5.0 to +18 -40 to +125 800µA Series MSOP, SOIC $2.96 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 $0.78 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 $1.03 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 $0.61 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 $0.48 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 $1.38 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 $0.78 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 $1.38 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 $2.53 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 $2.96 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 $1.38 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 $1.78 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 $0.78 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 $0.61 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 $0.78 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 $0.99 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 $2.96 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 $1.38 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 $2.53 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 $2.96 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 $2.82 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 $2.78 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 $1.03 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 $1.78 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 $0.78 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 $0.61 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 $0.78 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 $0.92 5V, Precision Micropower LDO Voltage Reference
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    REF195 5 0.2 2 50 30 +5.1 to +15 -40 to +85 45µA Series-Low Dropout DIP, SOIC, TSSOP $1.25 Precision Micropower, Low Dropout, Low Voltage References, Nom. Vo = 5 V
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    *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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