LMV227 Datasheet | National Semiconductor

Description The LMV227 is a 30 d B 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 pensated output voltage that relates linearly to the RF input power in d Bm. 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 d B dynamic range. Additional filtering can be applied using a single external capacitor. The LMV227 has an RF power detection range from -30 d Bm to 0 d Bm and is ideally suited for direct use in bination 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. Features n n n n n 30 d B linear in d B power detection range Output voltage range 0.2 to 2V Logic low shutdown Multi-band operation from 450 MHz to 2000 MHz Accurate temperature pensation Applications n n n n CDMA RF power control WCDMA RF power control CDMA2000 RF power control PA modules Typical Application © 2006 National Semiconductor Corporation DS201181 .national. 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 2000V 200V 6.0V Max Storage Temperature Range Junction Temperature (Note 3) Mounting Temperature Infrared or convection (20 sec) - 65˚C to 150˚C 150˚C Max 235˚C Operating Ratings (Note 1) Supply Voltage Temperature Range 2.7V to 5.5V - 40˚C to +85˚C 2.7 DC and AC Electrical Characteristics Unless otherwise specified, all limits are guaranteed...