500 MHz Four-Quadrant Multiplier Data Sheet AD834 FEATURES FUNCTIONAL BLOCK DIAGRAM V TO I AD834 DC to >500 MHz operation X1 7 8.5mA Differential 1 V full-scale inputs W1 5 8 X2 Differential 4 mA full-scale output current DISTORTION Low distortion (0.05% for 0 dBm input) CANCELLATION CURRENT 4mA Supply voltages from 4 V to 9 V AMPLIFIER FS DISTORTION (W) Low power (280 mW typical at V = 5 V) S CANCELLATION V TO I 8.5mA APPLICATIONS Y2 2 4 W2 High speed real time computation Y1 1 Wideband modulation and gain control Signal correlation and RF power measurement Figure 1. Voltage controlled filters and oscillators Linear keyers for high resolution television Wideband true RMS GENERAL DESCRIPTION The AD834 is a monolithic, laser-trimmed four-quadrant analog CERDIP, operates over the military temperature range of 55C multiplier intended for use in high frequency applications, with to +125C. S-grade chips are also available. a transconductance bandwidth (RL = 50 ) in excess of 500 MHz Two application notes featuring the AD834 (AN-212 and AN-216) from either of the differential voltage inputs. In multiplier can be found at www.analog.com. For additional applications modes, the typical total full-scale error is 0.5%, dependent on circuits, consult the AD811 data sheet. the application mode and the external circuitry. Performance PRODUCT HIGHLIGHTS is relatively insensitive to temperature and supply variations due to the use of stable biasing based on a band gap reference generator 1. Combines high static accuracy (low input and output and other design features. offsets and accurate scale factor) with very high bandwidth. As a four-quadrant multiplier or squarer, the response To preserve the full bandwidth potential of the high speed bipolar extends from dc to an upper frequency limited by packaging process used to fabricate the AD834, the outputs appear as a and external board layout considerations. Obtains a large differential pair of currents at open collectors. To provide a signal bandwidth of >500 MHz under optimum conditions. single-ended ground referenced voltage output, some form of 2. Used in many high speed nonlinear operations, such as external current-to-voltage conversion is needed. This may take square rooting, analog division, vector addition, and rms- the form of a wideband transformer, balun, or active circuitry to-dc conversion. In these modes, the bandwidth is limited such as an op amp. In some applications (such as power measure- by the external active components. ment), the subsequent signal processing may not need to have 3. Special design techniques result in low distortion levels high bandwidth. (better than 60 dB on either input) at high frequencies The transfer function is accurately trimmed such that when and low signal feedthrough (typically 65 dB up to 20 MHz). X = Y = 1 V, the differential output is 4 mA. This absolute 4. Exhibits low differential phase error over the input range calibration allows the outputs of two or more AD834 devices typically 0.08 at 5 MHz and 0.8 at 50 MHz. The large to be summed with precisely equal weighting, independent of signal transient response is free from overshoot and has an the accuracy of the load circuit. intrinsic rise time of 500 ps, typically settling to within 1% The AD834J, available in 8-lead PDIP and plastic SOIC packages, is in under 5 ns. specified over the commercial temperature range of 0C to 70C. 5. The nonloading, high impedance, differential inputs The AD834A is also available in 8-lead CERDIP and plastic SOIC simplify the application of the AD834. packages operating over the industrial temperature range of 40C to +85C. The AD834SQ/883B, available in an 8-lead Rev. F 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 2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 00894-001AD834 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Test Circuits ........................................................................................8 Applications ....................................................................................... 1 Explanation of Typical Performance Characteristics and Test Circuits ......................................................................................... 10 Functional Block Diagram .............................................................. 1 Theory of Operation ...................................................................... 11 General Description ......................................................................... 1 Transfer Function ....................................................................... 11 Product Highlights ....................................................................... 1 Biasing the Output ..................................................................... 12 Revision History ............................................................................... 2 Transformer Coupling ............................................................... 12 Specifications ..................................................................................... 3 Wideband Multiplier Connections .......................................... 13 Absolute Maximum Ratings ............................................................ 5 Power Measurement (Mean-Square and RMS) ......................... 14 Thermal Characteristics .............................................................. 5 Frequency Doubler .................................................................... 16 Chip Dimensions and Bonding Diagram ................................. 5 Wideband Three-Signal Multiplier/Divider ........................... 16 ESD Caution .................................................................................. 5 Outline Dimensions ....................................................................... 18 Pin Configuration and Function Descriptions ............................. 6 Ordering Guide .......................................................................... 19 Typical Performance Characteristics ............................................. 7 REVISION HISTORY 6/12Rev. E to Rev. F Added Explanation of Typical Performance Characteristics and Changes to Figure 1 .......................................................................... 1 Test Circuits Section ....................................................................... 10 Change to Bias Current Parameter, Table 1 .................................. 3 Changes to the Theory of Operation Section ............................. 11 Changes to Table 4 ............................................................................ 6 Added Figure 13 and Figure 14 .................................................... 12 Changes to Ordering Guide .......................................................... 19 Changes to Wideband Multiplier Connections .......................... 13 Changes to Figure 18 ...................................................................... 13 5/09Rev. D to Rev E Changes to Figure 20 ...................................................................... 15 Updated Format .................................................................. Universal Changes to Figure 21 ...................................................................... 16 Deleted Temperature Range and Package Options Parameters, Updated Outline Dimensions ....................................................... 17 Table 1 ................................................................................................ 4 Changes to Ordering Guide .......................................................... 18 Added Pin Configuration and Function Descriptions Section ................................................................................................ 6 4/02Rev. C to Rev. D Added Figure 10, Renumbered Figures Sequentially .................. 9 Edits to Ordering Guide Model Nomenclature Corrected .......... 3 Rev. F Page 2 of 20