GENERAL DESCRIPTION

The ADL5502 is a mean-responding (true rms) power detector in combination with an envelope detector to accurately determine the crest factor of a modulated signal. It can be used in high frequency receiver and transmitter signal chains from 450 MHz to 6 GHz with envelope bandwidths over 10 MHz. Requiring only a single supply between 2.5 V and 3.3 V, the detector draws less than 3 mA. The input is internally ac-coupled and has a nominal input impedance of 500 Ω.

FEATURES

True rms response detector

Envelope peak hold output

Excellent temperature stability

±0.25 dB rms detection accuracy vs. temperature

±0.25 dB envelope detection accuracy vs. temperature;

over the top 25 dB of the input range

Over 35 dB input power dynamic range, inclusive of crest factor

RF bandwidths from 450 MHz to 6 GHz

Envelope bandwidths of 10 MHz

500 Ω input impedance

Single-supply operation: 2.5 V to 3.3 V

Low power: 3 mA at 3 V supply

RoHS-compliant part

APPLICATIONS

Power and envelope measurement of W-CDMA, CDMA2000,

and QPSK-/QAM-based OFDM, and other complex

modulation waveforms

RF transmitter or receiver power and envelope measurement