ADL5903:  200 MHz to 6 GHz 35 dB TruPwr™ Detector

Product Details

Product Status:Recommended for New Designs

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 single-ended 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.

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.


  • Power amplifier linearization/control loops
  • Transmitter power controls
  • Transmitter signal strength indication (TSSI)
  • RF instrumentation
  • Wireless repeaters


  • 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
  • Linear in decibels output, scaled 35.5 mV/dB at 900 MHz
  • Waveform and modulation independent, such as
  • 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

Functional Block Diagram for ADL5903


Title Content Type File Type
ADL5903: 200 MHz to 6 GHz 35 dB TruPwr™ Detector Data Sheet (Rev 0, 10/2013) (pdf, 1351 kB) Data Sheets PDF
Analog Devices Unveils Wide Dynamic Range, Highly Accurate RF Power Detectors (16 Dec 2013) Press Releases HTML
RF Source Booklet  (PDF, 4353 kB)
RF IC Product Overview - Version P (02/2014)
Overview PDF
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADI’s ADIsimRF design tool provides calculations for the most important parameters within the RF signal chain, including cascaded gain, noise figure, IP3, P1dB, and total power consumption.
ADIsim Design/Simulation Tools HTML
ADL5903 S-Parameters  (zip, 6 kB) S-Parameters ZIP

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

Product Recommendations & Reference Designs

Companion Products

Suggested Companion Products

Recommended ADC for the ADL5903
  • For high speed, low power, we recommend the AD7466.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADL5903 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
ADL5903-EVALZ Status: Production Evaluation Board $150.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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