The LMV225/LMV226/LMV228 are 30dB 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, LMV226 and LMV228 are 30 dB RF power detectors designed for CDMA and WCDMA applications. They operate from 450 MHz to 2 GHz, with supply voltages from 2.7 V to 5.5 V and output voltages ranging 0.2 V to 2 V. The devices are offered in a 1.0 mm × 1.0 mm × 0.6 mm micro‑SMD package.
The document provides absolute maximum ratings, detailed electrical characteristics, connection diagrams, ordering information and layout recommendations, as well as application notes for gain‑cell implementations and life‑support policy details.
| RF frequency range | 450 MHz to 2 GHz |
|---|---|
| Supply voltage | 2.7 V to 5.5 V |
| Output voltage range | 0.2 V to 2 V |
| Detection range (LMV225) | -30 dBm to 0 dBm |
| Detection range (LMV226/LMV228) | -15 dBm to 15 dBm |
| Package size | 1.0 mm × 1.0 mm × 0.6 mm (micro SMD) |
The detectors operate from 450 MHz to 2 GHz.
They require a supply voltage between 2.7 V and 5.5 V.
The output voltage ranges from 0.2 V to 2 V.
They are supplied in a 1.0 mm × 1.0 mm × 0.6 mm micro SMD package.