LMP7731 - 2.9 nV/sqrt(Hz) Low Noise, Precision , RRIO Amplifier from the PowerWise® Family

Datasheet Packaging Samples & Pricing Design Tools Models Knowledge Base

Features

(Typical values, TA = 25°C, VS = 5V)

  • Input voltage noise

    • f = 3 Hz

    3.3 nV/ √Hz

    f = 1 kHz

    2.9 nV/ √Hz

    Offset voltage (max)

    ±40 µV

    Offset voltage drift (max)

    ±1.0 µV/°C

    CMRR

    130 dB

    Open loop gain

    130 dB

    GBW

    22 MHz

    Slew rate

    2.4 V/µs

    THD @ f = 10 kHz, AV = +1, RL = 2 kΩ

    0.001%

    Supply current per channel

    2.2 mA

    Supply voltage range

    1.8V to 5.5V

    Operating temperature range

    −40°C to 125°C

    Input bias current

    ±1.5 nA

    RRIO

    General Description

    The LMP7731 is a single, low noise, low offset voltage, rail-to-rail input and output, low voltage precision amplifier. More...


    Applications

    •Thermopile amplifier
    •Gas analysis instruments
    •Photometric instrumentation
    •Medical instrumentation
    		  Typical Application
    click for larger image


    Parametric Table     expand
    Parametric Table    collapse
    Offset Voltage max, 25C 0.05 mV
    TcVos 1 uV/degC
    CMRR 120 dB
    PSRR 129 dB
    Avol 130 dB
    Voltage Noise 2.9 nV/root(Hz)
    Max Input Bias Current 85 nA
    Gain Bandwidth 22 MHz
    Supply Current Per Channel 2.2 mA
    PowerWise Rating 2 100 uA/MHz
    Offset Voltage max, 25C 0.05 mV
    TcVos 1 uV/degC
    CMRR 120 dB
    PSRR 129 dB
    Avol 130 dB
    Voltage Noise 2.9 nV/root(Hz)
    Max Input Bias Current 85 nA
    Gain Bandwidth 22 MHz
    Supply Current Per Channel 2.2 mA
    PowerWise Rating 2 100 uA/MHz
    Slew Rate 2.4 Volts/usec
    Channels 1 Channels
    Supply Min 2.5 Volt
    Supply Max 5 Volt
    Input OutputType R-R In and Out
    Output Current 47 mA
    Shut down No
    Special Features Ultra Low Noise
    Temperature Min -40 deg C
    Temperature Max 125 deg C
    Function Op Amp
    Automotive Selection Guide Yes
    PowerWise Yes
    View Using Catalog


    Typical Performance

    click for larger image


    		  Also Recommended
    LMP7732Dual Version

    Additional Resources

    Design Tools (see below)


    Connection Diagram

    *click for larger image

    SOT-23 Pinout

    *click for larger image

    SOIC-8 Pinout

    Datasheet
    RoHS Compliance Information Size in KbytesDate Click link below to Download
    LMP7731 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier 729 Kbytes 16-Jun-08 View Online
    Download
    LMP7731 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier (Japanese)
    		 981 Kbytes   Download

    If you have trouble printing or viewing PDF file(s), see Printing Problems.


    Package Availability, Models, Samples & Pricing
    Part NumberPackageFactory Lead TimeModelsSamples &
    Electronic
    Orders    		Budgetary PricingStd
    Pack
    Size    		Package
    Marking
    Format
    TypePinsSpec.MSL
    Rating    		Peak
    Reflow    		RoHS
    Report    		CAD
    Symbols    		WeeksQtyQty$US each
    LMP7731MASOIC NARROW8NOPB1260RoHS N/A Full productionLMP7731.MOD
    		Samples
    Buy Now     		1K+$1.15rail
    of
    95    		NSZXTT
    LMP77
    31MA
    6 weeks500
    LMP7731MAXSOIC NARROW8NOPB1260RoHS N/A Full productionLMP7731.MOD
    		 
    Buy Now     		1K+$1.15reel
    of
    2500    		NSZXTT
    LMP77
    31MA
    6 weeksN/A
    LMP7731MFESOT-235NOPB1260RoHS N/A Full productionLMP7731.MOD
    		 
    Buy Now     		500+$1.28reel
    of
    250    		AY3A
    XTT
    6 weeks500
    LMP7731MFSOT-235NOPB1260RoHS N/A Full productionLMP7731.MOD
    		Samples
    Buy Now     		1K+$1.15reel
    of
    1000    		AY3A
    XTT
    6 weeks1000
    LMP7731MFXSOT-235NOPB1260RoHS N/A Full productionLMP7731.MOD
    		 
    Buy Now     		1K+$1.15reel
    of
    3000    		AY3A
    XTT
    6 weeksN/A

    General Description

    The LMP7731 is a single, low noise, low offset voltage, rail-to-rail input and output, low voltage precision amplifier. The LMP7731 is part of the LMP precision amplifier family and is ideal for precision and low noise applications with low voltage requirements.

    This operational amplifier offers low voltage noise of 2.9 nV/ with a 1/f corner of only 3 Hz and low DC offset with a maximum value of ±40 µV, targeting high accuracy, low frequency applications. The LMP7731 has bipolar input stages with a bias current of only 1.5 nA. This low input bias current, complemented by the very low AC and DC levels of voltage noise, makes the LMP7731 an excellent choice for photometry applications.

    The LMP7731 provides a wide GBW of 22 MHz while consuming only 2 mA of current. This high gain bandwidth along with the high open loop gain of 130 dB enables accurate signal conditioning in applications with high closed loop gain requirements.

    The LMP7731 has a supply voltage range of 1.8V to 5.5V, making it an ideal choice for battery operated portable applications.

    The LMP7731 is offered in the space saving 5-Pin SOT-23 and 8-Pin SOIC packages.

    Design Tools

    TitleSize in Kbytes Date Click link below to Download    
    WEBENCH Sensor Designer Tool     View    

    If you have trouble printing or viewing PDF file(s), see Printing Problems.

    Application Notes

    TitleSize in Kbytes Date Click link below to Download
    AN-1873: Application Note 1873 DC Parameters 249 Kbytes 19-Jun-08 Download
    AN-1873 (Chinese): Application Note 1873 DC Parameters
    		 379 Kbytes  
    AN-1515: Application Note 1515 A Comprehensive Study of the Howland Current Pump 227 Kbytes 29-Jan-08 Download

    If you have trouble printing or viewing PDF file(s), see Printing Problems.

    [Information as of 20-Nov-2008]