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Part Manufacturer: National Semiconductor

Part Description: LMV225 LMV226 LMV228 RF Power Detector for CDMA and WCDMA

Part Details:

LMV225/LMV226/LMV228 October 2006 LMV225/LMV226/LMV228RF Power Detector for CDMA and WCDMAGeneral Description Features The LMV225/LMV226/LMV228 are 30 dB RF power detec- n 30 dB linear in dB power detection range tors intended for use in CDMA and WCDMA applications. n Output voltage range 0.2 to 2V The device has an RF frequency range from 450 MHz to 2 n Logic low shutdown GHz. It provides an accurate temperature and supply com- n Multi-band operation from 450 MHz to 2000 MHz pensated output voltage that relates linearly to the RF input n Accurate temperature compensation power in dBm. The circuit operates with a single supply from RF n Packages: 2.7V to 5.5V. The LMV225/LMV226/LMV228 have an inte- -- micro SMD thin 1.0 mm x 1.0 mm x 0.6 mm grated filter for low-ripple average power detection of CDMA -- micro SMD ultra thin 1.0 mm x 1.0 mm x 0.35 mm signals with 30 dB dynamic range. Additional filtering can be Power -- LLP 2.2 mm x 2.5 mm x 0.8 mm applied using a single external capacitor. (LMV225 and LMV228) The LMV225 has an RF power detection range from ­30dBm to 0 dBm and is ideally suited for direct use in combi- Applications nation with resistive taps. The LMV226/LMV228 have a de- Detector tection range from ­15 dBm to 15 dBm and are intended for n CDMA RF power control use in combination with a directional coupler. The LMV226 is n WCDMA RF power control equipped with a buffered output which makes it suitable for n CDMA2000 RF power control GSM, EDGE, GPRS and TDMA applications. n PA modules The device is active for Enable = HI, otherwise it is in a lowpower consumption shutdown mode. During shutdown the for output will be LOW. The output voltage ranges from 0.2V to2V and can be scaled down to meet ADC input range re-quirements. CDMA The LMV225/LMV226/LMV228 power detectors are offeredin the thin 1.0 mm x 1.0 mm x 0.6 mm micro SMD packageand the ultra thin 1.0 mm x 1.0 mm x 0.35 mm micro SMDpackage. The LMV225 and the LMV228 are also offered in and the 2.2 mm x 2.5 mm x 0.8 mm LLP package. Typical Application WCDMA LMV225 LMV226/LMV228 20076001 20076046 © 2006 National Semiconductor Corporation DS200760 www.national.com

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