National Semiconductor | High-performance Analog

 

 LMH6646   
2.7V, 650µA, 55MHz Rail-to-Rail Input and Output Amplifiers with Shutdown Option from the PowerWise® Family		 Click link to Download

Features

(VS = 2.7V, TA = 25°C, RL = 1k to V+/2, AV = +1. Typical values unless specified).

-3dB BW

55MHz

Supply voltage range

2.5V to 12V

Slew rate

22V/µs

Supply current

650µA/channel

Output short circuit current

42mA

Linear output current

±20mA

Input common mode voltage

0.3V beyond rails

Output voltage swing

20mV from rails 

Input voltage noise

17nV/

Input current noise

0.75pA/

Description

The LMH™6645 (single) and LMH6646 (dual), rail-to-rail input and output voltage feedback amplifiers, offer high speed (55MHz), and low voltage operation (2.7V) in addition to micro-power shutdown capability (LMH6647, single).

Input common mode voltage range exceeds either supply by 0.3V, enhancing ease of use in multitude of applications where previously only inferior devices could be used. Output voltage range extends to within 20mV of either supply rails, allowing wide dynamic range especially in low voltage applications. Even with low supply current of 650µA/amplifier, output current capability is kept at a respectable ±20mA for driving heavier loads. Important device parameters such as BW, Slew Rate and output current are kept relatively independent of the operating supply voltage by a combination of process enhancements and design architecture.

In portable applications, the LMH6647 provides shutdown capability while keeping the turn-off current to less than 50µA. Both turn-on and turn-off characteristics are well behaved with minimal output fluctuations during transitions. This allows the part to be used in power saving mode, as well as multiplexing applications. Miniature packages (SOT23, MSOP-8, and SO-8) are further means to ease the adoption of these low power high speed devices in applications where board area is at a premium.


Applications

  • Active filters
  • High speed portable devices
  • Multiplexing applications (LMH6647)
  • Current sense buffer
  • High speed transducer amp

    • LMH6646 Webench® Custom
    Design/Analyze/Build It
    Select Topology
    Active Filter Designer
    Inverting Amplifier
    AC-Coupled Inverting Amp
    NonInverting Amp
    Integrator
    Lowpass Filter
    Lowpass Filter 4th Order
    Highpass Filter
    Required Parameters
    Supply voltage:
    If "Other", Positive Supply is: V
    If "Other", Negative Supply is: V
    NOTE: 2.5 V <= Total Supply Voltage <= 12 V

    What is Webench?

    Also Recommended
    LMH6619▲Dual With Higher 130MHz Bandwidth Plus Rail To Rail Input And Output

    		Connection Diagram
    *click for larger image



    Typical Performance
    click for larger image


    Parameters / ValuesLMH6646 LMH6619
    -3dB BW55 MHz 140 MHz
    AvCL for -3dB BW1 V/V 1 V/V
    Slew Rate22 Volts/usec 57 Volts/usec
    Input OutputTypeR-R In and Out R-R In and Out
    Supply Min2.5 Volt 2.7 Volt
    Supply Max12 Volt 11 Volt
    Supply Current Per Channel0.725 mA 1.45 mA
    PowerWise Rating 213.2 uA/MHz 10.4 uA/MHz
    Channels2 Channels 2 Channels
    Offset Voltage max, 25C3 mV 0.6 mV
    Max Input Bias Current4000 nA 2400 nA
    Output Current20 mA 35 mA
    Voltage Noise17 nV/root(Hz) 10 nV/root(Hz)
    Shut downNo No
    Feedback TypeVoltage Voltage
    Av+1 BW55 MHz 140 MHz
    Av+2 BW27.5 MHz 70 MHz
    Av+5 BW11 MHz 28 MHz
    Av+10 BW5.5 MHz 14 MHz
    Av+20 BW2.75 MHz 7 MHz
    HD 2nd-62 dB -75 dB
    HD 3rd-72 dB -75 dB
    Settling Time125 ns 90 ns
    Tsettling Conditionsto 0.1% to 0.1%
    FunctionOp Amp Op Amp
    Gain Bandwidth55 MHz 140 MHz
    Temperature Min-40 deg C -40 deg C
    Temperature Max85 deg C 125 deg C
    PowerWiseYes Yes

    Datasheets
    TitleSizeDateOther
    Language
    LMH6646 2.7V, 650µA, 55MHz Rail-to-Rail Input and Output Amplifiers with Shutdown Option1088
    Kbytes    		15-Jun-05日本語  


    Application Notes
    TitleSizeDateOther
    Language
    AN-1515: Application Note 1515 A Comprehensive Study of the Howland Current Pump227
    Kbytes    		29-Jan-08 

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMH6646MA/NOPB

    LMH6646MA

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide506
    AVNET-EMWorldwide1557
    DIGI-KEYWorldwide2591
    FARNELLEurope and Asia167
    MOUSERWorldwide370
    NEWARKAmericas167
    RS COMPONENTSWorldwide50
    TAYLORAmericas506
    		$1.05 each at 1K+ pcsrail
    of
    95
    LMH6646MAX/NOPB

    LMH6646MAX

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.05 each at 1K+ pcsreel
    of
    2500
    LMH6646MM/NOPB

    LMH6646MM

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide12993
    AVNET-EMWorldwide2048
    DIGI-KEYWorldwide12772
    FARNELLEurope and Asia709
    NEWARKAmericas709
    RS COMPONENTSWorldwide1020
    TAYLORAmericas12993
    		$1.05 each at 1K+ pcsreel
    of
    1000
    LMH6646MMX/NOPB

    LMH6646MMX

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 12 weeks

     
    DistributorRegionQty
    ARROWWorldwide10500
    DIGI-KEYWorldwide0
    TAYLORAmericas10500
    		$1.05 each at 1K+ pcsreel
    of
    3500
    LMH6646 MDC

    RoHS Status    		Full production
    Lead Time: 6 weeks

     

    Contact your distributor
    		CALLtray
    of
    N/A

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LMH6646.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LMH6646 is located at RoHS Status.

    Part Number(s)
    (NSID)    		DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMH730036/NOPB

    		Evaluation Board for High-Speed Dual Op Amp in the 8-Pin SOIC PackageFull production
    Lead Free (RoHS)

     
    DistributorRegionQty
    AVNET-EMWorldwide2
    DIGI-KEYWorldwide0
    MOUSERWorldwide20
    TAYLORAmericas15
    		$10.00 each1

    Description:

    National Semiconductor offers this unpopulated Evaluation Board to aid in the evaluation and testing of high-speed Op Amp that are offered in the 8-Pin SOIC package. Resistors, capacitors, or any other surface-mount components can be easily mounted on this board in the desired circuit configuration. The performance can then be evaluated under the test conditions of your choice. Power supplies, analog signal source, and other measurement equipment shall be provided by the user.

    Features:

    • Accommodates various high-speed Op Amp
    • Allows quick and easy evaluation
    • Serves as reference design to aid in high-speed PCB layout
    • Utilizes surface-mount components

    NOTE: IC samples are not shipped with the Evaluation PCB, but may be requested separately from the Order page in the Product Folder.

    Evaluation Board User Manual

    Evaluation Board Design Files


    Part Number(s)
    (NSID)    		DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMH730123/NOPB

    		Evaluation Board for High-Speed Dual Op Amp in the 8-Pin MSOP PackageFull production
    Lead Free (RoHS)

     
    DistributorRegionQty
    AVNET-EMWorldwide2
    DIGI-KEYWorldwide0
    MOUSERWorldwide3
    		$10.00 each1

    Description:

    National Semiconductor offers this unpopulated Evaluation Board to aid in the evaluation and testing of high-speed Op Amp that are offered in the 8-Pin MSOP package. Resistors, capacitors, or any other surface-mount components can be easily mounted on this board in the desired circuit configuration. The performance can then be evaluated under the test conditions of your choice. Power supplies, analog signal source, and other measurement equipment shall be provided by the user.

    Features:

    • Accommodates various high-speed Op Amp
    • Allows quick and easy evaluation
    • Serves as reference design to aid in high-speed PCB layout
    • Utilizes surface-mount components

    NOTE: IC samples are not shipped with the Evaluation PCB, but may be requested separately from the Order page in the Product Folder.

    Evaluation Board User Manual

    Evaluation Board Design Files




    National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

    Lead Free product status is available through the search tool located here

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LMH6646MA/NOPB

    LMH6646MA
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadspice file
    		NSZXTT
    LMH66
    46MA
    LMH6646MAX/NOPB

    LMH6646MAX
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadspice file
    		NSZXTT
    LMH66
    46MA
    LMH6646MM/NOPB

    LMH6646MM
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadspice file
    		ZXTT
    A70A
    LMH6646MMX/NOPB

    LMH6646MMX
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadspice file
    		ZXTT
    A70A
    LMH6646 MDC
    		1.012
    		Unpackaged Diespice file
    		-

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LMH6646.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LMH6646 is located at RoHS Status.

    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LMH6646 MDCVIP 100134110012450003353272149
    LMH6646MAVIP 100134110012450003353272149
    LMH6646MAXVIP 100134110012450003353272149
    LMH6646MMVIP 100134110012450003353272149
    LMH6646MMXVIP 100134110012450003353272149

    Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

    For more information on Reliability Metrics, please click here.


    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LMH6646.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LMH6646 is located at RoHS Status.

    [Information as of 8-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation