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 Description The LMV227 is a 30 dB RF power detector 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 5V. The LMV227 has 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 LMV227 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 device is active for Enable = HI, otherwise it goes into 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 output signal bandwidth can optionally be lowered externally as well. 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
	LMV227 Production RF Tested, RF Power Detector for CDMA and WCDMA	743 Kbytes	13-Jul-06

Featured Application Notes

Title		Size	Date	Other Language
	AN-1804: Application Note 1804 LMV225/LMV226/LMV228 microSMD Evaluation Board	275 Kbytes	11-Mar-08

More Application Notes

Title		Size	Date	Other Language
	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
	AN-1766: Application Note 1766 Evaluation Board for the LMV221 Logarithmic Power Detector	335 Kbytes	19-Dec-07	日本語
	AN-1375: Application Note 1375 Linear-In-dB RF Power Detector In W-CDMA User Equipment	670 Kbytes	14-Apr-05
	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