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AD835 Datasheet(PDF) 1 Page - Analog Devices |
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AD835 Datasheet(HTML) 1 Page - Analog Devices |
1 / 8 page FUNCTIONAL BLOCK DIAGRAM REV. A 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 rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a 250 MHz, Voltage Output 4-Quadrant Multiplier AD835 PRODUCT DESCRIPTION The AD835 is a complete four-quadrant voltage output analog multiplier fabricated on an advanced dielectrically isolated complementary bipolar process. It generates the linear product of its X and Y voltage inputs, with a –3 dB output bandwidth of 250 MHz (a small signal rise time of 1 ns). Full-scale (–1 V to +1 V) rise/fall times are 2.5 ns (with the standard R L of 150 Ω) and the settling time to 0.1% under the same conditions is typi- cally 20 ns. Its differential multiplication inputs (X, Y) and its summing in- put (Z) are at high impedance. The low impedance output volt- age (W) can provide up to ±2.5 V and drive loads as low as 25 Ω. Normal operation is from ±5 V supplies. Though providing state-of-the-art speed, the AD835 is simple to use and versatile. For example, as well as permitting the addi- tion 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-pin plastic mini-DIP package (N) and an 8-pin SOIC (R) and is specified to operate over the –40 °C to +85°C industrial temperature range. PRODUCT HIGHLIGHTS 1. The AD835 is the first monolithic 250 MHz four quadrant voltage output multiplier. 2. Minimal external components are required to apply the AD835 to a variety of signal processing applications. 3. High input impedances (100 k Ω 2 pF) make signal source loading negligible. 4. High output current capability allows low impedance loads to be driven. 5. State of the art noise levels achieved through careful device optimization and the use of a special low noise bandgap volt- age reference. 6. Designed to be easy to use and cost effective in applications which formerly required the use of hybrid or board level solutions. FEATURES Simple: Basic Function is W = XY + Z Complete: Minimal External Components Required Very Fast: Settles to 0.1% of FS in 20 ns DC-Coupled Voltage Output Simplifies Use High Differential Input Impedance X, Y and Z Inputs Low Multiplier Noise: 50 nV/ √Hz APPLICATIONS 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 Y1 Y2 Z INPUT Y = Y1 –Y2 X = X1 –X2 XY + Z X1 X2 W OUTPUT XY AD835 ∑ +1 © Analog Devices, Inc., 1994 One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 |
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