0.1 GHz to 2.5 GHz 70 dB Logarithmic Detector/Controller Data Sheet AD8313 FEATURES FUNCTIONAL BLOCK DIAGRAM NINE DETECTOR CELLS Wide bandwidth: 0.1 GHz to 2.5 GHz min + + + + + IV 8 VOUT High dynamic range: 70 dB to 3.0 dB VPOS 1 High accuracy: 1.0 dB over 65 dB range ( 1.9 GHz) C INT Fast response: 40 ns full-scale typical 2 INHI LP 8dB 8dB 8dB 8dB Controller mode with error output 7 VI VSET 3 INLO Scaling stable over supply and temperature EIGHT 8dB 3.5GHz AMPLIFIER STAGES Wide supply range: 2.7 V to 5.5 V INTERCEPT 6 COMM Low power: 40 mW at 3 V AD8313 CONTROL Power-down feature: 60 mW at 3 V 4 VPOS SLOPE BAND GAP GAIN Complete and easy to use 5 PWDN CONTROL REFERENCE BIAS APPLICATIONS Figure 1. RF transmitter power amplifier setpoint control and level monitoring Logarithmic amplifier for RSSI measurement cellular base stations, radio link, radar GENERAL DESCRIPTION The AD8313 is a complete multistage demodulating logarithmic Table 1. Next Generation Upgrades for AD8313 amplifier that can accurately convert an RF signal at its input to Part Number Comments an equivalent decibel-scaled value at its dc output. The AD8313 ADL5513 Improved range and temperature stability, maintains a high degree of log conformance for signal frequencies operation up to 4 GHz from 0.1 GHz to 2.5 GHz. Application is straightforward, AD8318 Improved temperature stability, operation up to 8 GHz requiring only a single supply of 2.7 V to 5.5 V and the addition AD8317 Lower input range, improved temperature of a suitable input and supply decoupling. Operating on a 3 V stability, operation up to 10 GHz supply, its 13.7 mA consumption (for TA = 25C) is only 41 mW. AD8319 Lower input range, improved temperature A power-down feature is provided the input is taken high to stability, operation up to 10 GHz initiate a low current (20 A) sleep mode, with a threshold at half the supply voltage. 2.0 5 FREQUENCY = 1.9GHz The AD8313 is fabricated on Analog Devices, Inc., advanced 1.8 4 25 GHz silicon bipolar IC process and is available in an 8-lead 1.6 3 MSOP package. The operating temperature range is 40C to 1.4 2 +85C. 1.2 1 1.0 0 0.8 1 0.6 2 0.4 3 0.2 4 5 0 80 70 60 50 40 30 20 10 0 INPUT AMPLITUDE (dBm) Figure 2. Typical Logarithmic Response and Error vs. Input Amplitude Rev. E 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 19982015 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com OUTPUT VOLTAGE (V DC) OUTPUT ERROR (dB) 01085-C-002 01085-C-001AD8313 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Basic Connections for Log (RSSI) Mode ................................ 15 Applications ....................................................................................... 1 Operating in Controller Mode ................................................. 15 Functional Block Diagram .............................................................. 1 Input Coupling ........................................................................... 16 General Description ......................................................................... 1 Narrow-Band LC Matching Example at 100 MHz ................ 16 Revision History ............................................................................... 2 Adjusting the Log Slope............................................................. 18 Specifications ..................................................................................... 3 Increasing Output Current........................................................ 18 Absolute Maximum Ratings ............................................................ 6 Effect of Waveform Type on Intercept .................................... 19 ESD Caution .................................................................................. 6 Evaluation Board ............................................................................ 20 Pin Configuration and Function Description .............................. 7 Schematic and Layout ................................................................ 20 Typical Performance Characteristics ............................................. 8 General Operation ..................................................................... 20 Circuit Description ......................................................................... 11 Using the AD8009 Operational Amplifier .............................. 20 Interfaces .......................................................................................... 13 Varying the Logarithmic Slope ................................................. 20 Power-Down Interface, PWDN ................................................ 13 Operating in Controller Mode ................................................. 20 Signal Inputs, INHI, INLO ........................................................ 13 RF Burst Response ..................................................................... 20 Logarithmic/Error Output, VOUT .......................................... 13 Outline Dimensions ....................................................................... 24 Setpoint Interface, VSET ........................................................... 14 Ordering Guide .......................................................................... 24 Applications Information .............................................................. 15 REVISION HISTORY 9/15Rev. D to Rev. E Changes to General Description Section ...................................... 1 Added Table 1 Renumbered Sequentially .................................... 1 Updated Outline Dimensions ....................................................... 24 Changes to Ordering Guide .......................................................... 24 6/04Rev. C to Rev. D Updated Evaluation Board Section .............................................. 21 2/03Rev. B to Rev. C TPCs and Figures Renumbered ........................................ Universal Edits to Specifications ...................................................................... 2 Updated ESD Caution ...................................................................... 4 Updated Outline Dimensions ......................................................... 7 8/99Rev. A to Rev. B 5/99Rev. 0 to Rev. A 8/98Revision 0: Initial Version Rev. E Page 2 of 24