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Image AD835
型号: AD835
厂商: Analog Devices Inc Analog Devices Inc
标准:
分类: 半导体
描述: 250 mhz, voltage output 4-quadrant multiplier
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250 MHz, Voltage Output  
4-Quadrant Multiplier  
a
AD835  
FUNCTIO NAL BLO CK D IAGRAM  
FEATURES  
Sim ple: Basic Function is W = XY + Z  
Com plete: Minim al External Com ponents Required  
Very Fast: Settles to 0.1% of FS in 20 ns  
DC-Coupled Voltage Output Sim plifies Use  
High Differential Input Im pedance X, Y and Z Inputs  
Low Multiplier Noise: 50 nV/ Hz  
X = X1 –X2  
XY  
X1  
X2  
AD835  
XY + Z  
+1  
W OUTPUT  
Y1  
Y2  
APPLICATIONS  
Very Fast Multiplication, Division, Squaring  
Wideband Modulation and Dem odulation  
Phase Detection and Measurem ent  
Sinusoidal Frequency Doubling  
Video Gain Control and Keying  
Y = Y1 –Y2  
Z INPUT  
Voltage Controlled Am plifiers and Filters  
P RO D UCT D ESCRIP TIO N  
P RO D UCT H IGH LIGH TS  
T he 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 RL of 150 ?)  
and the settling time to 0.1% under the same conditions is typi-  
cally 20 ns.  
1. T he 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??2 pF) make signal source  
loading negligible.  
4. High output current capability allows low impedance loads  
to be driven.  
Its differential multiplication inputs (X, Y) and its summing in-  
put (Z) are at high impedance. T he low impedance output volt-  
age (W) can provide up to ±2.5 V and drive loads as low as  
25 ?. Normal operation is from ±5 V supplies.  
5. State of the art noise levels achieved through careful device  
optimization and the use of a special low noise bandgap volt-  
age reference.  
T hough 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 nVHz) makes it much more useful than earlier products.  
6. Designed to be easy to use and cost effective in applications  
which formerly required the use of hybrid or board level  
solutions.  
T he 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.  
REV. A  
Inform ation furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assum ed by Analog Devices for its  
use, nor for any infringem ents of patents or other rights of third parties  
which m ay result from its use. No license is granted by im plication or  
otherwise under any patent or patent rights of Analog Devices.  
? Analog Devices, Inc., 1994  
One Technology Way, P.O. Box 9106, Norw ood. MA 02062-9106, U.S.A.  
Tel: 617/ 329-4700  
Fax: 617/ 326-8703  
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