50 Hz to 6 GHz, 50 dB TruPwr Detector Data Sheet AD8363 FEATURES FUNCTIONAL BLOCK DIAGRAM VTGT VREF VPOS COMM Accurate rms-to-dc conversion from 50 Hz to 6 GHz 12 11 10 9 Single-ended input dynamic range of >50 dB 13 8 No balun or external input tuning required NC AD8363 TEMP Waveform and modulation independent RF power detection Linear-in-decibels output, scaled: 52 mV/dB 2 X Log conformance error: <0.15 dB INHI 14 7 VSET Temperature stability: <0.5 dB 2 X Voltage supply range: 4.5 V to 5.5 V Operating temperature range: 40C to +125C 15 6 INLO VOUT Power-down capability to 1.5 mW Small footprint, 4 mm 4 mm, LFCSP TCM1 16 5 CLPF APPLICATIONS 3 4 1 2 Power amplifier linearization/control loops TCM2/PWDN CHPF VPOS COMM Multi-Standard, Multi-Carrier Wireless Infrastructure Figure 1. AD8363 Block Diagram (MCGSM, CDMA, WCDMA, TD-SCDMA, WiMAX, LTE) Transmitter power control Transmitter signal strength indication (TSSI) RF instrumentation GENERAL DESCRIPTION The AD8363 is a true rms responding power detector that can Used as a power measurement device, VOUT is connected to be directly driven with a single-ended 50 source. This feature VSET. The output is then proportional to the logarithm of the makes the AD8363 frequency versatile by eliminating the need rms value of the input. The reading is presented directly in for a balun or any other form of external input tuning for operation decibels and is conveniently scaled to 52 mV/dB, or approximately up to 6 GHz. 1 V per decade however, other slopes are easily arranged. In controller mode, the voltage applied to VSET determines the The AD8363 provides an accurate power measurement, power level required at the input to null the deviation from the independent of waveform, for a variety of high frequency setpoint. The output buffer can provide high load currents. communication and instrumentation systems. Requiring only a single supply of 5 V and a few capacitors, it is easy to use and The AD8363 has 1.5 mW power consumption when powered provides high measurement accuracy. The AD8363 can operate down by a logic high applied to the TCM2/PWDN pin. It powers from arbitrarily low frequencies to 6 GHz and can accept inputs up within about 30 s to its nominal operating current of 60 mA at that have rms values from less than 50 dBm to at least 0 dBm, 25C. The AD8363 is available in a 4 mm 4 mm 16-lead LFCSP with large crest factors exceeding the requirements for accurate for operation over the 40C to +125C temperature range. measurement of WiMAX, CDMA, W-CDMA, TD-SCDMA, A fully populated RoHS compliant evaluation board is also multicarrier GSM, and LTE signals. available. The AD8363 can determine the true power of a high frequency signal having a complex low frequency modulation envelope, or it can be used as a simple low frequency rms voltmeter. The high- pass corner generated by its internal offset-nulling loop can be lowered by a capacitor added on the CHPF pin. 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 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 20092015 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. 07368-001AD8363 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 VSET Interface ............................................................................ 17 Applications ....................................................................................... 1 Output Interface ......................................................................... 17 Functional Block Diagram .............................................................. 1 VTGT Interface .......................................................................... 18 General Description ......................................................................... 1 Measurement Mode Basic Connections.................................. 18 Revision History ............................................................................... 2 System Calibration and Error Calculation .............................. 19 Specif icat ions ..................................................................................... 3 Operation to 125C .................................................................... 19 Absolute Maximum Ratings ............................................................ 7 Output Voltage Scaling .............................................................. 20 ESD Caution .................................................................................. 7 Offset Compensation, Minimum C , and Maximum C LPF HPF Capacitance Values ..................................................................... 20 Pin Configuration and Function Descriptions ............................. 8 Choosing a Value for CLPF .......................................................... 21 Typical Performance Characteristics ............................................. 9 RF Pulse Response and VTGT ................................................. 23 Theory of Operation ...................................................................... 14 Controller Mode Basic Connections ....................................... 23 Square Law Detector and Amplitude Target .............................. 14 Constant Output Power Operation .......................................... 24 RF Input Interface ...................................................................... 15 Description of RF Characterization ......................................... 25 Choice of RF Input Pin .............................................................. 15 Evaluation and Characterization Circuit Board Layouts ...... 26 Small Signal Loop Response ..................................................... 15 Assembly Drawings .................................................................... 28 Temperature Sensor Interface ................................................... 16 Outline Dimensions ....................................................................... 29 VREF Interface ........................................................................... 16 Ordering Guide .......................................................................... 29 Temperature Compensation Interface ..................................... 16 Power-Down Interface ............................................................... 17 REVISION HISTORY 3/15Rev. A to Rev. B Changes to Figure 2 and Table 3 ..................................................... 8 Changes to Controller Mode Basic Connections Section ......... 23 Updated Outline Dimensions ....................................................... 29 Changes to the Ordering Guide .................................................... 29 7/11Rev. 0 to Rev. A Changes to Features Section and Applications Section ............... 1 Added 3-Point Calibration to Table 1 for All MHz ...................... 3 Replaced Typical Performance Characteristics Section Renumbered Sequentially ................................................................ 9 Changes to Theory of Operation Section .................................... 14 Changes to Temperature Compensation Interface Section ...... 16 Changes to System Calibration and Error Calculation Section and Changes to Figure 44 and Figure 45 ....................... 19 Deleted Basis for Error Calculations Section .............................. 20 Changes to Figure 46 ...................................................................... 20 Deleted Selecting and Increasing Calibration Points to Improve Accuracy over a Reduced Range Section ..................... 22 Deleted Altering the Slope Section .............................................. 23 Added Output Voltage Scaling Section ....................................... 23 5/09Revision 0: Initial Version Rev. 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