Overview

Features and Benefits

  • Simple: Basic Function is 
    W = XY + Z
  • Complete: Minimal External Components Required
  • DC-Coupled Voltage Output Simplifies 
    Use
  • Very Fast: Settles to 0.1% of FS in 20 ns
  • High Differential Input Impedance X, Y, and Z Inputs
  • Low Multiplier Noise: 50 nV/vHz

Product Details

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 to fall times are 2.5 ns (with a standard RL of 150 Ω), and the settling time to 0.1% under the same conditions is typically 20 ns.

Its differential multiplication inputs (X, Y) and its summing input (Z) are at high impedance. The low impedance output voltage (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 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.


Product Highlights

  • The AD835 is the first monolithic 250 MHz, four-quadrant voltage output multiplier.
  • Minimal external components are required to apply the AD835 to a variety of signal processing applications.
  • High input impedances (100 kΩ||2 pF) make signal source loading negligible.
  • High output current capability allows low impedance loads to be driven.
  • State-of-the-art noise levels achieved through careful device optimization and the use of a special low noise, band gap voltage reference.
  • Designed to be easy to use and cost effective in applications that require the use of hybrid or board-level solutions.
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

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations

SPICE Models

Design Tools

ADIsimPE Linear and Mixed-Signal Circuit Simulator – Personal Edition

ADIsimPE, which is powered by SIMetrix/SIMPLIS, is a circuit simulation suite optimized for the design and development of analog and mixed signal circuits. SIMetrix mode is ideal for the simulation of general non-switching circuits. It provides full Pspice compatibility for use with industry-standard SPICE models. SIMPLIS (SIMulation Piecewise-Linear System) mode simulates the operation of switching circuits with vastly improved robustness, speed, and accuracy compared to standard SPICE. It is particularly useful for switching power supply, PLLs, and ADC/DAC applications.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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