用于 LMV225 microSMD 的评估板
- AN-1804 LMV225/LMV226/LMV228 DSBGA Evaluation Board
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2013年 4月 25日 80 次点击(英文內容)
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This board can be used to evaluate National Semiconductor's LMV225/LMV226/LMV228 RF detectors. These logarithmic power detectors are intended for use in CDMA and WCDMA applications. They have a 30 dB dynamic range and an RF frequency range from 450 MHz to 2 GHz. The LMV226/LMV228 are designed to be used in combination with a directional coupler, while the LMV225 detector is especially suited for power measurements via a high-resistive tap as well as directional coupler. The LMV226 has an additional output voltage buffer and therefore a low output impedance. The LMV225/LMV226/LMV228 have an integrated filter for low-ripple average power detection of CDMA signals. Additional filtering can be applied using a single external capacitor.