ADL5504

FEATURES True rms response detector Excellent temperature stability ±0.25 dB rms detection accuracy vs. temperature Over 35 dB input power dynamic range, inclusive of crest factor RF bandwidths from 450 MHz to 6000 MHz 500 Ω input impedance Single-supply operation: 2.5 V to 3.3 V Low power: 1.8 mA at 3.0 V supply RoHS compliant part APPLICATIONS Power measurement of W-CDMA, CDMA2000, QPSK-/QAMbased OFDM (LTE and WiMAX), and other complex modulation waveforms RF transmitter or receiver power measurement 450 MHz to 6000 MHz TruPwr Detector ADL5504 FUNCTIONAL BLOCK DIAGRAM VPOS ENBL RFIN ADL5504 1kΩ RMS CORE INTERNAL FILTERING 100Ω BUFFER FLTR VRMS COMM Figure 1. 08437-001 10 1 OUTPUT (V) 0.1 GENERAL DESCRIPTION The ADL5504 is a TruPwr™ mean-responding (true rms) power detector for use in high frequency receiver and transmitter signal chains from 450 MHz to 6000 MHz. Requiring only a single supply between 2.5 V and 3.3 V, the detector draws less than 1.8 mA. The input is internally ac-coupled and has a nominal input impedance of 500 Ω. The rms output is a linear-responding dc voltage with a conversion gain of 1.87 V/V rms at 900 MHz. The ADL5504 is a highly accurate, easy to use means of determining the rms of complex waveforms. It can be used for power measurements of both simple and complex waveforms but is particularly useful for measuring high crest factor (high peak-to-rms ratio) signals, such as W-CDMA, CDMA2000, WiMAX, WLAN, and LTE waveforms. 08437-002 0.0...