250 MHz, Voltage Output, 4-Quadrant Multiplier Data Sheet AD835 FEATURES FUNCTIONAL BLOCK DIAGRAM AD835 X = X1 X2 Simple: basic function is W = XY + Z X1 Complete: minimal external components required X2 Very fast: Settles to 0.1% of full scale (FS) in 20 ns XY XY + Z X1 W OUTPUT + DC-coupled voltage output simplifies use + Y1 High differential input impedance X, Y, and Z inputs Y2 Low multiplier noise: 50 nV/Hz Y = Y1 Y2 Z INPUT APPLICATIONS Figure 1. Very fast multiplication, division, squaring Wideband modulation and demodulation Phase detection and measurement Sinusoidal frequency doubling Video gain control and keying Voltage-controlled amplifiers and filters GENERAL DESCRIPTION PRODUCT HIGHLIGHTS The AD835 is a complete four-quadrant, voltage output analog 1. The AD835 is the first monolithic 250 MHz, four-quadrant multiplier, fabricated on an advanced dielectrically isolated voltage output multiplier. complementary bipolar process. It generates the linear product 2. Minimal external components are required to apply the of its X and Y voltage inputs with a 3 dB output bandwidth of AD835 to a variety of signal processing applications. 250 MHz (a small signal rise time of 1 ns). Full-scale (1 V to 3. High input impedances (100 k 2 pF) make signal source +1 V) rise to fall times are 2.5 ns (with a standard R of 150 ), L loading negligible. and the settling time to 0.1% under the same conditions is 4. High output current capability allows low impedance loads typically 20 ns. to be driven. 5. State-of-the-art noise levels achieved through careful Its differential multiplication inputs (X, Y) and its summing device optimization and the use of a special low noise, input (Z) are at high impedance. The low impedance output band gap voltage reference. voltage (W) can provide up to 2.5 V and drive loads as low as 6. Designed to be easy to use and cost effective in applications 25 . Normal operation is from 5 V supplies. that require the use of hybrid or board-level solutions. Though providing state-of-the-art speed, the AD835 is simple to use and versatile. For example, as well as permitting the addition of a signal at the output, the Z input provides the means to operate the AD835 with voltage gains up to about 10. In this capacity, the very low product noise of this multiplier (50 nV/Hz) makes it much more useful than earlier products. The AD835 is available in an 8-lead PDIP package (N) and an 8-lead SOIC package (R) and is specified to operate over the 40C to +85C industrial temperature range. 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 19942014 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 00883-001AD835 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................7 Applications ....................................................................................... 1 Theory of Operation ...................................................................... 10 General Description ......................................................................... 1 Basic Theory ............................................................................... 10 Functional Block Diagram .............................................................. 1 Scaling Adjustment .................................................................... 10 Product Highlights ........................................................................... 1 Applications Information .............................................................. 11 Revision History ............................................................................... 2 Multiplier Connections ............................................................. 11 Specifications ..................................................................................... 3 Wideband Voltage-Controlled Amplifier ............................... 11 Absolute Maximum Ratings ............................................................ 5 Amplitude Modulator ................................................................ 11 Thermal Resistance ...................................................................... 5 Squaring and Frequency Doubling .......................................... 12 ESD Caution .................................................................................. 5 Outline Dimensions ....................................................................... 13 Pin Configuration and Function Descriptions ............................. 6 Ordering Guide .......................................................................... 14 REVISION HISTORY 12/14Rev. D to Rev. E Changes to Figure 1 .......................................................................... 1 Changes to Figure 20 ...................................................................... 10 Changes to Wideband Voltage-Controlled Amplifier Section and Figure 21 ................................................................................... 11 Changes to Ordering Guide .......................................................... 14 12/10Rev. C to Rev. D Changes to Figure 1 .......................................................................... 1 Changes to Absolute Maximum Ratings and Table 2 .................. 5 Added Figure 19, Renumbered Subsequent Tables .................... 10 Added Figure 23 .............................................................................. 11 10/09Rev. B to Rev. C Updated Format .................................................................. Universal Changes to Figure 22 ...................................................................... 11 Updated Outline Dimensions ....................................................... 13 Changes to Ordering Guide .......................................................... 14 6/03Rev. A to Rev. B Updated Format .................................................................. Universal Updated Outline Dimensions ....................................................... 10 Rev. E Page 2 of 14