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LMV226 Dataheets PDF



Part Number LMV226
Manufacturers National Semiconductor
Logo National Semiconductor
Description (LMV225 - LMV228) RF Power Detector
Datasheet LMV226 DatasheetLMV226 Datasheet (PDF)

www.DataSheet4U.com LMV225/LMV226/LMV228 RF Power Detector for CDMA and WCDMA March 2005 LMV225/LMV226/LMV228 RF Power Detector for CDMA and WCDMA General 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.

  LMV226   LMV226


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www.DataSheet4U.com LMV225/LMV226/LMV228 RF Power Detector for CDMA and WCDMA March 2005 LMV225/LMV226/LMV228 RF Power Detector for CDMA and WCDMA General 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 small 1.0 mm x 1.0 mm X 0.6 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. Features n n n n n n 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 package 1.0 mm x 1.0 mm x 0.6 mm — LLP package 2.2 mm x 2.5 mm x 0.8 mm (LMV225 and LMV228) Applications n n n n CDMA RF power control WCDMA RF power control CDMA2000 RF power control PA modules Typical Application LMV225 LMV226/LMV228 20076001 20076046 © 2005 National Semiconductor Corporation DS200760 www.national.com LMV225/LMV226/LMV228 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage VDD - GND ESD Tolerance (Note 2) Human Body Model Machine Model Storage Temperature Range 2000V 200V −65˚C to 150˚C 6.0V Max Junction Temperature (Note 3) Mounting Temperature Infrared or convection (20 sec) 150˚C Max 235˚C Operating Ratings (Note 1) Supply Voltage Temperature Range RF Frequency Range 2.7V to 5.5V −40˚C to +85˚C 450 MHz to 2 GHz 2.7 DC and AC Electrical Characteristics Unless otherwise specified, all limits are guaranteed to VDD = 2.7V; TJ = 25˚C. Boldface limits apply at temperature extremes. (Note 4) Symbol IDD Parameter Supply Current Condition Active Mode: RFIN/EN = VDD (DC), No RF Input Power Present LMV225 LMV226 LMV228 Shutdown: RFIN/EN = GND (DC), No RF Input Power Present VLOW VHIGH ton EN Logic Low Input Level (Note 6) EN Logic High Input Level (Note 6) Turn-on-Time (Note 9) No RF Input Power Present, Output Loaded with 10 pF Step from no Power to 0 dBm Applied, Output Loaded with 10 pF Step from no Power to 15 dBm Applied, Output Loaded with 10 pF IEN PIN Current into RFIN/EN Pin Input Power Range (Note 5) LMV225 −30 0 −43 −13 LMV226 −15 15 −28 2 LMV228 −15 15 −28 2 LMV225 LMV226 LMV228 LMV225 1.8 2.1 1.2 1.7 4.5 µs Min Typ 4.8 4.9 4.9 0.44 Max 7 8 6.2 8 6.2 8 4.5 0.8 µA V V mA Units tr Rise Time (Note 7) LMV226 LMV228 1.8 4.8 1 µs µA dBm dBV dBm dBV dBm dBV www.national.com 2 LMV225/LMV226/LMV228 2.7 DC and AC Electrical Characteristics Symbol Parameter Logarithmic Slope (Note 8) 900 MHz Condition (Continued) Unless otherwise specified, all limits are guaranteed to VDD = 2.7V; TJ = 25˚C. Boldface limits apply at temperature extremes. (Note 4) Min LMV225 LMV226 LMV228 1800 MHz LMV225 LMV226 LMV228 1900 MHz LMV225 LMV226 LMV228 2000 MHz LMV225 LMV226 LMV228 Logarithmic Intercept (Note 8) 900 MHz LMV225 LMV226 LMV228 1800 MHz LMV225 LMV226 LMV228 1900 MHz LMV225 LMV226 LMV228 2000 MHz LMV225 LMV226 LMV228 Typ 44.0 44.5 44.0 39.4 41.6 41.9 38.5 41.2 41.6 38.5 41.0 41.2 −45.5 −24.5 −27.2 −46.6 −25.1 −28.2 −46.3 −24.9 −28.0 −46.7 −24.7 −28.0 214 223 228 4.5 5.3 19.8 700 nV/ 29 34 350 350 350 mA kΩ mV dBm mV/dB Max Units VOUT Output Voltage No RF Input Power Present LMV226 Only LMV225 LMV226 LMV228 IOUT ROUT en Output Current Sourcing/Sinking Output Impedance Output Referred Noise LMV225/LMV228 only, no RF Input Power Present RF Input = 1800 MHz, −10 dBm for LMV225 and 5 dBm for LMV226/LMV228, Measured at 10 kHz 3 www.national.com LMV225/LMV226/LMV228 2.7 DC and AC Electrical Characteristics Symbol Parameter Variation Due to Temperature Condition (Continued) Unless otherwise specified, all limits are guaranteed to VDD = 2.7V; TJ = 25˚C. Boldface limits apply at temperature extremes. (No.


LMV225 LMV226 LMV228


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