50 Hz to 3.8 GHz 65 dB TruPwr Detector Data Sheet AD8362 FEATURES FUNCTIONAL BLOCK DIAGRAM DECL CHPF Complete, fully calibrated measurement/control system Accurate rms-to-dc conversion from 50 Hz to 3.8 GHz Input dynamic range of >65 dB: 52 dBm to +8 dBm in 50 INHI 2 Waveform and modulation independent, such as x CLPF INLO GSM/CDMA/TDMA Linear-in-decibels output, scaled 50 mV/dB VOUT Law conformance error of 0.5 dB 2 VTGT x ACOM All functions temperature and supply stable Operates from 4.5 V to 5.5 V at 24 mA Power-down capability to 1.3 mW VSET APPLICATIONS AD8362 Power amplifier linearization/control loops VREF BIAS VPOS Transmitter power controls Transmitter signal strength indication (TSSI) COMM PWDN Radio frequency (RF) instrumentation Figure 1. Table 1. Next Generation Upgrades for the AD8362 GENERAL DESCRIPTION Device No. Product Description The AD8362 is a true rms-responding power detector that has ADL5902 Improved temperature stability, single-ended a 65 dB measurement range. It is intended for use in a variety of input drive. high frequency communication systems and in instrumentation HMC1120 Improved sensitivity and range, includes envelope requiring an accurate response to signal power. It is easy to use, tracking and peak-hold function, single-ended requiring only a single supply of 5 V and a few capacitors. It input drive. operates from arbitrarily low frequencies to over 3.8 GHz and ADL5906 Improved temperature stability, single-ended accepts inputs from 52 dBm to +8 dBm with crest factors that input drive. Slightly lower input range. are typical of quadrature amplitude modulation (QAM) and AD8363 Improved temperature stability, single-ended input drive. Lower input range. orthogonal frequency division multiplexing (OFDM) modulation ADL5903 Lower range, significantly lower power consumption, schemes. single-ended input drive. The AD8362 has a 1.3 mW power consumption when powered ADL5501 Lower range, significantly lower power consumption, down by a logic high applied to the PWDN pin. It powers up linear in V/V output, single-ended input drive. within about 20 s to its nominal operating current of 20 mA at 25C. The AD8362 is supplied in a 16-lead TSSOP for operation over the temperature range of 40C to +85C. Rev. F 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20032015 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 02923-001AD8362 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Operation in RF Measurement Mode .......................................... 20 Applications ....................................................................................... 1 Basic Connections ...................................................................... 20 Functional Block Diagram .............................................................. 1 Device Disable ............................................................................ 20 General Description ......................................................................... 1 Recommended Input Coupling ................................................ 20 Revision History ............................................................................... 3 Operation at Low Frequencies .................................................. 21 Specifications ..................................................................................... 4 Choosing a Value for CHPF ...................................................... 22 Absolute Maximum Ratings ............................................................ 7 Choosing a Value for CLPF ....................................................... 22 ESD Caution .................................................................................. 7 Adjusting VTGT to Accommodate Signals with Very High Crest Factors ............................................................................... 23 Pin Configuration and Function Descriptions ............................. 8 Altering the Slope ....................................................................... 23 Equivalent Circuits ........................................................................... 9 Temperature Compensation and Reduction of Transfer Typical Performance Characteristics ........................................... 10 Function Ripple .......................................................................... 24 Characterization Setup .................................................................. 16 Temperature Compensation at Various WiMAX Frequencies up Equipment ................................................................................... 16 to 3.8 GHz ........................................................................................ 25 Analysis ........................................................................................ 16 Operation in Controller Mode ................................................. 27 Circuit Description ......................................................................... 17 RMS Voltmeter with 90 dB Dynamic Range .......................... 28 Square Law Detection ................................................................ 17 AD8362 Evaluation Board ............................................................ 29 Voltage vs. Power Calibration ................................................... 18 Outline Dimensions ....................................................................... 32 Offset Elimination ...................................................................... 19 Ordering Guide .......................................................................... 32 Time-Domain Response of the Closed Loop ......................... 19 Rev. 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