Datasheet ADL5903 (Analog Devices)

200 MHz to 6 GHz 35 dB TruPwr™ Detector Data Sheet ADL5903 FEATURES FUNCTIONAL BLOCK DIAGRAM Accurate rms-to-dc conversion from 200 MHz to 6 GHz VPOS CREG 5 4 Measurement dynamic range of 35 dB ADL5903 Ripple-free transfer function INTERNAL FILTERING ENBL 6 Single-ended input, 50 Ω source compatible 1kΩ 630pF No external matching required 3 CRMS Waveform and modulation independent, such as 4pF 100Ω GSM/CDMA/W-CDMA/TD-SCDMA/LTE RFIN 1 RMS CORE 7 VRMS Linear in decibels output, scaled 35.5 mV/dB at 900 MHz BUFFER Excellent temperature stability
001
2 8 GND NIC EP Operates from 3.0 V to 5.0 V from −55°C to +125°C
11769-
Low power consumption: 3 mA at 3.0 V to 5.0 V supply
Figure 1.
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 The ADL5903 can be used to determine the true power of a a 35 dB measurement range. It features low power consumption high frequency signal with a complex modulation envelope and an intrinsically ripple-free error transfer function. including large crest factor signals such as GSM, CDMA, The ADL5903 provides a solution in a variety of high frequency W-CDMA, TD-SCDMA, and LTE modulated signals. The systems requiring an accurate measurement of signal power. output is then proportional to the logarithm of the rms value Requiring only a single supply of 3.0 V to 5.0 V and a few of the input. In other words, the reading is presented directly capacitors, it is easy to use and capable of being driven single- in decibels and is scaled about 35.5 mV/dB at 900 MHz. ended or with a balun for differential input drive. An on-chip The ADL5903 has low power consumption when operational matching network provides good return loss over the specified and a disable mode that further reduces the power consumption. frequency range of the device. The ADL5903 can operate from Power consumption is less than 100 µA when the ADL5903 200 MHz to 6 GHz and can accept inputs from −30 dBm to enters power-down mode through a logic low at Pin ENBL. +20 dBm. 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 responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 ©2013–2015 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com
Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS MEASUREMENT SETUPS THEORY OF OPERATION RF INPUT INTERFACE BASIC CONNECTIONS CHOOSING A VALUE FOR CRMS DEVICE CALIBRATION AND ERROR CALCULATION EVALUATION BOARD SCHEMATIC AND CONFIGURATION OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE