Datasheet AD835 (Analog Devices)

250 MHz, Voltage Output, 4-Quadrant Multiplier Data Sheet AD835 FEATURES FUNCTIONAL BLOCK DIAGRAM Simple: basic function is W = XY + Z X1 X = X1 – X2 AD835 Complete: minimal external components required X2 Very fast: Settles to 0.1% of full scale (FS) in 20 ns XY XY + Z X1 DC-coupled voltage output simplifies use W OUTPUT + + High differential input impedance X, Y, and Z inputs Y1 Low multiplier noise: 50 nV/√Hz Y2 Y = Y1 – Y2
001 00883-
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 dielectrical y 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 kΩ||2 pF) make signal source +1 V) rise to fall times are 2.5 ns (with a standard RL of 150 Ω), 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. Its differential multiplication inputs (X, Y) and its summing 5. State-of-the-art noise levels achieved through careful input (Z) are at high impedance. The low impedance output device optimization and the use of a special low noise, voltage (W) can provide up to ±2.5 V and drive loads as low as band gap voltage reference. 25 Ω. Normal operation is from ±5 V supplies. 6. Designed to be easy to use and cost effective in applications 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 −40°C to +85°C industrial temperature range.
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Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION BASIC THEORY SCALING ADJUSTMENT APPLICATIONS INFORMATION MULTIPLIER CONNECTIONS WIDEBAND VOLTAGE-CONTROLLED AMPLIFIER AMPLITUDE MODULATOR SQUARING AND FREQUENCY DOUBLING OUTLINE DIMENSIONS ORDERING GUIDE