10 MHz to 10 GHz 67 dB TruPwr Detector Data Sheet ADL5906 FEATURES FUNCTIONAL BLOCK DIAGRAM VPOS1 VPOS2 Accurate rms-to-dc conversion from 10 MHz to 10 GHz 3 10 Single-ended 1.0 dB dynamic range: 67 dB at 2.14 GHz TEMPERATURE ADL5906 8 VTEMP SENSOR No balun or external input matching required Response independent of waveform types, such as I GSM-EDGE/CDMA/W-CDMA/TD-SCDMA/WiMAX/LTE 14 SQR RFIN+ 2 X 15 Logarithmic slope: 55 mV/dB RFIN 7 VSET LINEAR-IN-dB VGA Temperature stability: <1 dB from 40C to +125C (NEGATIVE SLOPE) 2 X Operating temperature: 55C to +125C I TGT Supply voltage: 4.75 V to 5.25 V 2 6 VRMS NIC G = 5 Sleep current: 250 A 16 NIC Pin compatible with ADL5902 and AD8363 V BIAS AND POWER REF NIC 13 DOWN CONTROL 2.3V 5 CRMS EPAD 26pF APPLICATIONS 1 11 12 9 4 Power amplifier linearization/control loops TADJ/ VREF VTGT GND2 GND1 PWDN Transmitter signal strength indication (TSSI) Figure 1. RF instrumentation GENERAL DESCRIPTION The ADL5906 is a true rms responding power detector that has a Used as a power measurement device, VRMS is connected to 67 dB measurement range when driven with a single-ended 50 VSET. The output is then proportional to the logarithm of the source. The easy to use input makes the ADL5906 frequency rms value of the input. In other words, the reading is presented versatile by eliminating the need for a balun or any other form directly in decibels and is scaled 1.1 V per decade, or 55 mV/dB of external input tuning for operation up to 10 GHz. other slopes are easily arranged. In controller mode, the voltage applied to VSET determines the power level required at the The ADL5906 provides a solution in a variety of high frequency input to null the deviation from the setpoint. The output buffer systems requiring an accurate rms measurement of signal power. can provide high load currents. The ADL5906 can operate from 10 MHz to 10 GHz and can accept inputs from 65 dBm to +8 dBm with varying crest factors Requiring only a single supply of 5 V and a few capacitors, it is and bandwidths, such as GSM-EDGE, CDMA, W-CDMA, easy to use and capable of being driven single-ended or with a TD-SCDMA, WiMAX, and OFDM-based LTE carriers. In balun for differential input drive. The ADL5906 has a low 250 A addition, its temperature stability over the broad temperature sleep current when powered down by a logic high applied to the range of 55C to +125C makes it ideally suited for a wide array PWDN pin. It powers up within approximately 1.4 s to its of communications, military, industrial, and instrumentation nominal operating current of 68 mA at 25C. applications. The ADL5906 is supplied in a 4 mm 4 mm, 16-lead LFCSP, and it is pin compatible with the ADL5902 and the AD8363 TruPwr rms detectors. This feature allows the designer to create one circuit layout for projects requiring different dynamic ranges. A fully populated RoHS-compliant evaluation board is available. Rev. A 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 2013 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. 11287-001ADL5906 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 VSET Interface ............................................................................ 19 Applications ....................................................................................... 1 Output Interface ......................................................................... 19 Functional Block Diagram .............................................................. 1 VTGT Interface .......................................................................... 19 General Description ......................................................................... 1 Basis for Error Calculations ...................................................... 20 Revision History ............................................................................... 2 Measurement Mode Basic Connections.................................. 20 Specifications ..................................................................................... 3 Setting V ................................................................................ 20 TADJ Absolute Maximum Ratings ............................................................ 7 Setting V ................................................................................. 21 TGT ESD Caution .................................................................................. 7 Choosing a Value for C ......................................................... 21 RMS Pin Configuration and Function Descriptions ............................. 8 Output Voltage Scaling .............................................................. 22 Typical Performance Characteristics ............................................. 9 System Calibration and Error Calculation .............................. 24 Theory of Operation ...................................................................... 16 Using VTEMP to Improve Intercept Temperature Drift ........... 25 Square Law Detector and Amplitude Target .............................. 16 Description of Characterization ............................................... 27 RF Input Interface ...................................................................... 17 Evaluation Board ............................................................................ 28 Temperature Sensor Interface ................................................... 17 Evaluation Board Assembly Drawings .................................... 29 VREF Interface ........................................................................... 17 Outline Dimensions ....................................................................... 30 Temperature Compensation Interface ..................................... 18 Ordering Guide .......................................................................... 30 Power-Down Interface ............................................................... 19 REVISION HISTORY 10/13Rev. 0 to Rev. A Changes to Table 2 ............................................................................ 7 Changes to Ordering Guide .......................................................... 30 3/13Revision 0: Initial Version Rev. A Page 2 of 32