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ADL5903 Dataheets PDF



Part Number ADL5903
Manufacturers Analog Devices
Logo Analog Devices
Description Detector
Datasheet ADL5903 DatasheetADL5903 Datasheet (PDF)

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.

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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. The ADL5903 has low power consumption when operational and a disable mode that further reduces the power consumption. Power consumption is less than 100 µA when the ADL5903 enters power-down mode through a logic low at Pin ENBL. The ADL5903 is supplied in a 2 mm × 2 mm, 8-lead LFCSP for operation over the wide temperature range of −55°C to +125°C. Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2013–2015 Analog Devices, Inc. All rights reserved. Technical Suppo.


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