ADL5903

Data Sheet FEATURES Accurate rms-to-dc conversion from 200 MHz to 6 GHz Measurement dynamic range of 35 dB Ripple-free transfer function Single-ended input, 50 Ω source compatible No external matching required Waveform and modulation independent, such as GSM/CDMA/W-CDMA/TD-SCDMA/LTE Linear in decibels output, scaled 35.5 mV/dB at 900 MHz Excellent temperature stability Operates from 3.0 V to 5.0 V from −55°C to +125°C Low power consumption: 3 mA at 3.0 V to 5.0 V supply 8-lead, 2 mm × 2 mm LFCSP package APPLICATIONS Power amplifier linearization/control loops Transmitter power controls Transmitter signal strength indication (TSSI) RF instrumentation Wireless repeaters GENERAL DESCRIPTION The ADL5903 is a true rms responding power detector that has a 35 dB measurement range. It features low power consumption and an intrinsically ripple-free error transfer function. The ADL5903 provides a solution in a variety of high frequency systems requiring an accurate measurement of signal power. Requiring only a single supply of 3.0 V to 5.0 V and a few capacitors, it is easy to use and capable of being driven singleended or with a balun for differential input drive. An on-chip matching network provides good return loss over the specified frequency range of the device. The ADL5903 can operate from 200 MHz to 6 GHz and can accept inputs from −30 dBm to +20 dBm. 200 MHz to 6 GHz 35 dB TruPwr™ Detector ADL5903 FUNCTIONAL BLOCK DIAGRAM VPOS 5 ADL5903 ENBL 6 1kΩ CREG 4 INTERNAL FILTERIN...