AD835ARZ

Overview

The AD835ARZ is a four-quadrant voltage output analog multiplier fabricated on an advanced dielectrically isolated complementary bipolar process. It generates the linear product of X and Y inputs with a -3 dB bandwidth of 250 MHz. The device features high differential input impedance (100 kΩ || 2 pF) and low noise (50 nV/√Hz). It operates from ±4.5 V to ±5.5 V supplies, typically ±5 V. The output can drive loads as low as 25 Ω with swings up to ±2.5 V. It settles to 0.1% in 20 ns.

Feature Summary

• Provides complete four-quadrant multiplication with minimal external components required.
• Features a unique summing input (Z) allowing signal addition and voltage gain operation.
• Offers very fast settling time to 0.1% of full scale in 20 ns.
• Delivers low multiplier noise of 50 nV/√Hz for improved signal processing.

Applications

• Very fast multiplication, division, and squaring
• Wideband modulation and demodulation
• Phase detection and measurement
• Sinusoidal frequency doubling
• Video gain control and keying

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current guide. The 'R' indicates an 8-lead SOIC package, while 'Z' denotes RoHS compliance. Confirm that the REEL suffix matches the required tape-and-reel quantity if applicable. Ensure the industrial temperature range (-40°C to +85°C) meets system requirements before finalizing procurement.

Selection Notes

Select this component when high-speed analog multiplication is required within a compact surface-mount footprint. The AD835ARZ is suitable for applications demanding wide bandwidth and low noise. Consider the Z input for adding offset or gain control signals. Verify power supply decoupling needs for optimal performance at frequencies exceeding 100 MHz.

Part Context

The AD835 series represents a monolithic solution for high-frequency analog signal processing. The AD835ARZ specifically utilizes the standard small outline package variant. It serves as a versatile building block for communication systems and test equipment requiring precise voltage-controlled amplification or mixing functions without complex discrete implementations.

Replacement Considerations

The AD835ARZ-REEL is the reel-packaged equivalent of the tube version. Other variants include the AD835ANZ (PDIP package) and AD835AR (non-RoHS SOIC). Check pinout compatibility and thermal resistance differences when substituting between package types.

FAQ

What is the basic mathematical function of the AD835?

The basic function is W = XY + Z, where W is the output, X and Y are the differential multiplication inputs, and Z is the summing input.

How does the Z input enhance functionality?

The Z input allows the addition of a signal to the output and enables the device to operate with voltage gains up to approximately ×10.

What is the typical settling time for the AD835?

The device settles to 0.1% of full scale in typically 20 ns under standard conditions.