10 MHz, Four-Quadrant Multiplier/Divider AD734 FEATURES FUNCTIONAL BLOCK DIAGRAM High accuracy AD734 0.1% typical error X1 X = X X 1 2 HIGH ACCURACY High speed XIF X2 TRANSLINEAR CORE 10 MHz full power bandwidth DD 450 V/s slew rate U XY U Z + XZ DENOMINATOR 200 ns settling to 0.1% at full power WIF W CONTROL U U0 Low distortion A U1 ER O 80 dBc from any input R U Third-order IMD typically 75 dBc at 10 MHz U2 Low noise Y1 Y = Y Y Z = Z Z Z1 1 2 1 2 ZIF YIF 94 dB SNR, 10 Hz to 20 kHz Y2 Z2 70 dB SNR, 10 Hz to 10 MHz Figure 1. Direct division mode 2 MHz BW at gain of 100 APPLICATIONS High performance replacement for AD534 Multiply, divide, square, square root Modulators, demodulators Wideband gain control, rms-to-dc conversion Voltage-controlled amplifiers, oscillators, and filters Demodulator with 40 MHz input bandwidth GENERAL DESCRIPTION The AD734 is an accurate high speed, four-quadrant analog 10 MHz to a gain of 20 dB, 2 MHz at a gain of 40 dB, and 200 kHz multiplier that is pin compatible with the industry-standard at a gain of 60 dB, for a gain-bandwidth product of 200 MHz. AD534 and provides the transfer function W = XY/U. The The advanced performance of the AD734 is achieved by a AD734 provides a low impedance voltage output with a full combination of new circuit techniques, the use of a high speed power (20 V p-p) bandwidth of 10 MHz. Total static error complementary bipolar process, and a novel approach to laser (scaling, offsets, and nonlinearities combined) is 0.1% of full trimming based on ac signals rather than the customary dc scale. Distortion is typically less than 80 dBc and guaranteed. methods. The wide bandwidth (>40 MHz) of the AD734s input The low capacitance X, Y, and Z inputs are fully differential. stages and the 200 MHz gain-bandwidth product of the multiplier In most applications, no external components are required to core allow the AD734 to be used as a low distortion demodulator define the function. with input frequencies as high as 40 MHz as long as the desired The internal scaling (denominator) voltage, U, is 10 V, derived output frequency is less than 10 MHz. from a buried-Zener voltage reference. A new feature provides The AD734AQ and AD734BQ are specified for the industrial the option of substituting an external denominator voltage, temperature range of 40C to +85C and come in a 14-lead allowing the use of the AD734 as a two-quadrant divider with a CERDIP and a 14-lead PDIP package. The AD734SQ/883B, 1000:1 denominator range and a signal bandwidth that remains available processed to MIL-STD-883B for the military range of 55C to +125C, is available in a 14-lead CERDIP. Rev. E 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 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 00827-003AD734 TABLE OF CONTENTS Features .............................................................................................. 1 Functional Description.................................................................. 10 Applications....................................................................................... 1 Available Transfer Functions .................................................... 10 Functional Block Diagram .............................................................. 1 Direct Denominator Control.................................................... 11 General Description ......................................................................... 1 Operation as a Multiplier .......................................................... 12 Revision History ............................................................................... 2 Operation as a Divider............................................................... 14 Specifications..................................................................................... 3 Division by Direct Denominator Control............................... 14 Absolute Maximum Ratings............................................................ 5 A Precision AGC Loop .............................................................. 15 Thermal Resistance ...................................................................... 5 Wideband RMS-to-DC Converter Using U Interface........... 16 ESD Caution.................................................................................. 5 Low Distortion Mixer ................................................................ 17 Pin Configuration and Function Descriptions............................. 6 Outline Dimensions....................................................................... 18 Typical Performance Characteristics ............................................. 7 Ordering Guide .......................................................................... 19 REVISION HISTORY 2/11Rev. D to Rev. E Changes to Figure 4, Figure 5, and Figure 6.................................. 7 Changes to Figure 22 and Figure 23............................................. 12 Changes to Figure 27 and Figure 28............................................. 14 Changes to Figure 36...................................................................... 17 1/11Rev. C to Rev. D Updated Format..................................................................Universal Changes to Figure 1 and General Description Section ............... 1 Deleted Product Highlights Section............................................... 1 Change to Endnote 3........................................................................ 4 Changes to Table 2 and Table 3....................................................... 5 Added Pin Configuration and Function Descriptions Section.. 6 Added Figure 3 Renumbered Sequentially .................................. 6 Added Table 4 Renumbered Sequentially .................................... 6 Changes to Functional Description Section ............................... 10 Changes to Figure 36...................................................................... 17 Updated Outline Dimensions ....................................................... 19 Changes to Ordering Guide .......................................................... 19 Rev. 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