National Semiconductor | High-performance Analog

 

 LMV225   
RF Power Detector for CDMA and WCDMA in micro SMD from the PowerWise® Family		 Click link to Download

Features
  • 30 dB linear in dB power detection range
  • Output voltage range 0.2 to 2V
  • Logic low shutdown
  • Multi-band operation from 450 MHz to 2000 MHz
  • Accurate temperature compensation
  • Packages:
  • micro SMD thin 1.0 mm x 1.0 mm x 0.6 mm
  • micro SMD ultra thin 1.0 mm x 1.0 mm x 0.35 mm
  • LLP 2.2 mm x 2.5 mm x 0.8 mm (LMV225 and LMV228)

    • Description

    The LMV225/LMV226/LMV228 are 30 dB RF power detectors intended for use in CDMA and WCDMA applications. The device has an RF frequency range from 450 MHz to 2 GHz. It provides an accurate temperature and supply compensated output voltage that relates linearly to the RF input power in dBm. The circuit operates with a single supply from 2.7V to 5.5V. The LMV225/LMV226/LMV228 have an integrated filter for low-ripple average power detection of CDMA signals with 30 dB dynamic range. Additional filtering can be applied using a single external capacitor.

    The LMV225 has an RF power detection range from -30 dBm to 0 dBm and is ideally suited for direct use in combination with resistive taps. The LMV226/LMV228 have a detection range from -15 dBm to 15 dBm and are intended for use in combination with a directional coupler. The LMV226 is equipped with a buffered output which makes it suitable for GSM, EDGE, GPRS and TDMA applications.

    The device is active for Enable = HI, otherwise it is in a low power consumption shutdown mode. During shutdown the output will be LOW. The output voltage ranges from 0.2V to 2V and can be scaled down to meet ADC input range requirements.

    The LMV225/LMV226/LMV228 power detectors are offered in the thin 1.0 mm x 1.0 mm x 0.6 mm micro SMD package and the ultra thin 1.0 mm x 1.0 mm x 0.35 mm micro SMD package. The LMV225 and the LMV228 are also offered in the 2.2 mm x 2.5 mm x 0.8 mm LLP package.


    Applications

  • CDMA RF power control
  • WCDMA RF power control
  • CDMA2000 RF power control
  • PA modules




    • Typical Application
    click for larger image


    		Block Diagram
    click for larger image



    Typical Performance
    click for larger image


     

    ParametersValues
    RF Frequency (MHz) 450-2000
    Dynamic Range 30 dB
    Detector Power Range -30dBm to 0dBm
    Accuracy 1 dB
    Inputs/Outputs 1/1
    Transfer Linear in dB
    Modulation Independent No
    Supply Min 2.7 Volt
    Supply Max 5 Volt
    Supply Current 4.8 mA
    Shut down Yes
    Detector Resistive Tap, Internal Det
    VCO Freq Range 0.4 to 2GHz
    Application CDMA,WCDMA,GSM,EDGE,GPRS,TDMA
    Channels 1 Channels
    Temperature Min -40 deg C
    Temperature Max 85 deg C
    PowerWise Yes

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMV225SD/NOPB

    LMV225SD

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AITGAsia Pacific1001
    ARROWWorldwide1000
    AVNET-EMWorldwide1267
    CEACAsia Pacific5000
    DIGI-KEYWorldwide1894
    TAYLORAmericas1000
    		$0.50 each at 1K+ pcsreel
    of
    1000
    LMV225SDX/NOPB


    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide31500
    DIGI-KEYWorldwide0
    MOUSERWorldwide4500
    		$0.50 each at 1K+ pcsreel
    of
    4500
    LMV225TL/NOPB


    RoHS Status

    MICRO SMD    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1500
    AVNET-EMWorldwide1149
    DIGI-KEYWorldwide5938
    TAYLORAmericas1500
    		$0.38 each at 1K+ pcsreel
    of
    250
    LMV225TLX/NOPB


    RoHS Status

    MICRO SMD    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide3000
    CEACAsia Pacific6000
    DIGI-KEYWorldwide0
    KEIKONGAsia Pacific22800
    		$0.38 each at 1K+ pcsreel
    of
    3000
    LMV225UR/NOPB


    RoHS Status

    MICRO SMD    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide1055
    MOUSERWorldwide1000
    		$0.38 each at 1K+ pcsreel
    of
    250
    LMV225URX/NOPB


    RoHS Status

    MICRO SMD    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.38 each at 1K+ pcsreel
    of
    3000

    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 LMV225.

    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 LMV225 is located at RoHS Status.

    Part Number(s)
    (NSID)    		DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMV225SDEVAL
    		Evaluation Board for the LMV225 LLPFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$99.00 each1

    Description:

    This board can be used to evaluate National Semiconductor`s LMV225/LMV228 RF detectors. These logarithmic power detectors are intended for use in CDMA and WCDMA applications. They have a 30 dB dynamic range and an RF frequency range from 450 MHz to 2 GHz. The LMV228 is designed to be used in combination with a directional coupler, while the LMV225 detector is especially suited for power measurements via a high-resistive tap as well as directional coupler. The LMV225/LMV228 have an integrated filter for low-ripple average power detection of CDMA signals. Additional filtering can be applied using a single external capacitor.

    Contents:

    • LMV225 LLP Evaluation Board
    • LMV225 Datasheet
    • Application Note 1817 for the LMV225/LMV228 LLP EVALUATION BOARD

    Part Number(s)
    (NSID)    		DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMV225TLEVAL
    		Evaluation Board for the LMV225 microSMDFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide1
    		$99.00 each1

    Description:

    This board can be used to evaluate National Semiconductor`s LMV225/LMV226/LMV228 RF detectors. These logarithmic power detectors are intended for use in CDMA and WCDMA applications. They have a 30 dB dynamic range and an RF frequency range from 450 MHz to 2 GHz. The LMV226/LMV228 are designed to be used in combination with a directional coupler, while the LMV225 detector is especially suited for power measurements via a high-resistive tap as well as directional coupler. The LMV226 has an additional output voltage buffer and therefore a low output impedance. The LMV225/LMV226/LMV228 have an integrated filter for low-ripple average power detection of CDMA signals. Additional filtering can be applied using a single external capacitor.

    Contents:

    • LMV225 microSMD Evaluation Board
    • LMV225 Datasheet
    • Application Note 1804 for the LMV225 microSMD EVALUATION BOARD



    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
    LMV225SD/NOPB

    LMV225SD
    		11.721
    11.105
    		LLP61
    1    		260
    260    		DetailN/AN/A
    		XTT
    A90
    LMV225SDX/NOPB

    		11.721
    		LLP61260DetailN/AN/A
    		XTT
    A90
    LMV225TL/NOPB

    		1.308
    		MICRO SMD41260DetailN/AN/A
    		X
    I
    LMV225TLX/NOPB

    		1.308
    		MICRO SMD41260DetailN/AN/A
    		X
    I
    LMV225UR/NOPB

    		.715
    		MICRO SMD41260DetailN/AN/A
    		X
    I
    LMV225URX/NOPB

    		.715
    		MICRO SMD41260DetailN/AN/A
    		X
    I

    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 LMV225.

    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 LMV225 is located at RoHS Status.

    [Information as of 9-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation