ADL5500

www.DataSheet4U.com 100 MHz to 6 GHz TruPwr™ Detector ADL5500 FEATURES True rms response Excellent temperature stability ±0.1 dB accuracy vs. temperature over top 8 dB of input range Up to 30 dB input dynamic range at 3.9 GHz 50 Ω input impedance 1250 mV rms, +15 dBm, maximum input Single-supply operation: 2.7 V to 5.5 V Low power: 3 mW at 3 V supply RoHS compliant 5 1 OUTPUT (V) 0.1 05546-001 APPLICATIONS Measurement of CDMA2000, W-CDMA, and QPSK-/QAMbased OFDM, and other complex modulation waveforms RF transmitter or receiver power measurement 0.03 –25 –20 –15 –10 –5 0 5 10 15 INPUT (dBm) Figure 1. Output vs. Input Level, Supply 3 V, Frequency 1.9 GHz GENERAL DESCRIPTION The ADL5500 is a mean-responding power detector for use in high frequency receiver and transmitter signal chains from 100 MHz to 6 GHz. It is easy to apply, requiring only a single supply between 2.7 V and 5.5 V and a power supply decoupling capacitor. The input is internally ac-coupled and has a nominal input impedance of 50 Ω. The output is a linear-responding dc voltage with a conversion gain of 6.4 V/V rms at 900 MHz. The on-chip, 1 kΩ series resistance at the output combined with an external shunt capacitor creates a low-pass filter response that reduces the residual ripple in the dc output voltage. The ADL5500 is intended for true power measurement of simple and complex waveforms. The device is particularly useful for measuring high crest factor (high peak-to-rms ratio) signals, such as CDMA200...