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

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Datasheet

Title		Size	Date	Other Language
	LMV225/LMV226/LMV228 RF Power Detector for CDMA and WCDMA	1259 Kbytes	10-Oct-06

Featured Application Notes

Title		Size	Date	Other Language
	AN-1375: Application Note 1375 Linear-In-dB RF Power Detector In W-CDMA User Equipment	670 Kbytes	14-Apr-05
	AN-1804: Application Note 1804 LMV225/LMV226/LMV228 microSMD Evaluation Board	275 Kbytes	11-Mar-08
	AN-1817: Application Note 1817 LMV225/LMV228 LLP Evaluation Board	263 Kbytes	26-Mar-08

More Application Notes

Title		Size	Date	Other Language
	AN-1766: Application Note 1766 Evaluation Board for the LMV221 Logarithmic Power Detector	335 Kbytes	19-Dec-07	日本語
	AN-1374: Application Note 1374 Use of LMV225 Linear-In-dB RF Power Detector In CDMA2000 1X and EV_DO Mobile Station and Access Terminal	941 Kbytes	14-Apr-05	中文
	AN-1438: Application Note 1438 A Simple Method to Reduce DC Power Consumption in CDMA RF Power Amplifiers Through the LMV225 and an Efficient Switcher	512 Kbytes	6-Jan-06	中文