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AD734AN Datasheet(PDF) 1 Page - Analog Devices |
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AD734AN Datasheet(HTML) 1 Page - Analog Devices |
1 / 20 page 10 MHz, Four-Quadrant Multiplier/Divider AD734 Rev. E Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2011 Analog Devices, Inc. All rights reserved. FEATURES High accuracy 0.1% typical error High speed 10 MHz full power bandwidth 450 V/μs slew rate 200 ns settling to 0.1% at full power Low distortion −80 dBc from any input Third-order IMD typically −75 dBc at 10 MHz Low noise 94 dB SNR, 10 Hz to 20 kHz 70 dB SNR, 10 Hz to 10 MHz 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 FUNCTIONAL BLOCK DIAGRAM XIF YIF ZIF WIF DD ER U RU DENOMINATOR CONTROL X = X1 – X2 Y = Y1 –Y2 Z = Z1 – Z2 XZ U + – XY ÷ U – Z HIGH ACCURACY TRANSLINEAR CORE AD734 AO ∞ X1 X2 U0 W Z1 Z2 U1 U2 Y1 Y2 Figure 1. GENERAL DESCRIPTION The AD734 is an accurate high speed, four-quadrant analog multiplier that is pin compatible with the industry-standard AD534 and provides the transfer function W = XY/U. The AD734 provides a low impedance voltage output with a full power (20 V p-p) bandwidth of 10 MHz. Total static error (scaling, offsets, and nonlinearities combined) is 0.1% of full scale. Distortion is typically less than −80 dBc and guaranteed. The low capacitance X, Y, and Z inputs are fully differential. In most applications, no external components are required to define the function. The internal scaling (denominator) voltage, U, is 10 V, derived from a buried-Zener voltage reference. A new feature provides the option of substituting an external denominator voltage, allowing the use of the AD734 as a two-quadrant divider with a 1000:1 denominator range and a signal bandwidth that remains 10 MHz to a gain of 20 dB, 2 MHz at a gain of 40 dB, and 200 kHz at a gain of 60 dB, for a gain-bandwidth product of 200 MHz. The advanced performance of the AD734 is achieved by a combination of new circuit techniques, the use of a high speed complementary bipolar process, and a novel approach to laser trimming based on ac signals rather than the customary dc methods. The wide bandwidth (>40 MHz) of the AD734’s input stages and the 200 MHz gain-bandwidth product of the multiplier core allow the AD734 to be used as a low distortion demodulator with input frequencies as high as 40 MHz as long as the desired output frequency is less than 10 MHz. The AD734AQ and AD734BQ are specified for the industrial temperature range of −40°C to +85°C and come in a 14-lead CERDIP and a 14-lead PDIP package. The AD734SQ/883B, available processed to MIL-STD-883B for the military range of −55°C to +125°C, is available in a 14-lead CERDIP. |
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