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ADL5903

Analog Devices
Part Number ADL5903
Manufacturer Analog Devices
Description Detector
Published Feb 27, 2016
Detailed Description Data Sheet FEATURES Accurate rms-to-dc conversion from 200 MHz to 6 GHz Measurement dynamic range of 35 dB Ripple-free t...
Datasheet PDF File ADL5903 PDF File

ADL5903
ADL5903


Overview
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 FILTERING 630pF 3 CRMS 4pF RFIN 1 RMS CORE 100Ω 7 VRMS BUFFER 2 GND 8 NIC Figure 1.
EP 11769-001 The ADL5903 can be used to determine the true power of a high frequency signal with a complex modulation envelope including large crest factor signals such as GSM, CDMA, W-CDMA, TD-SCDMA, and LTE modulated signals.
The output is then proportional to the logarithm of the rms value of the input.
In other words, the reading is presented directly in decibels and is scaled about 35.
5 mV/dB at 900 MHz.
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