Overview
The AD835ARZ-REEL, produced by Analog Devices Inc., is a complete four-quadrant, voltage output analog multiplier. Fabricated on an advanced dielectrically isolated complementary bipolar process, this component is designed for high-speed and low-noise signal processing applications. It generates the linear product of its X and Y voltage inputs with a −3 dB output bandwidth of 250 MHz and a small signal rise time of 1 ns. The AD835 is known for its simplicity, requiring minimal external components, and its versatility in various signal processing tasks.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Bandwidth | 250 | MHz |
| Small Signal Rise Time | 1 | ns |
| Full-Scale Rise/Fall Times | 2.5 | ns (RL = 150 Ω) |
| Settling Time to 0.1% FS | 20 | ns |
| Differential Input Impedance | 100 kΩ || 2 pF | |
| Output Voltage Swing | ±2.2 to ±2.5 | V |
| Output Noise Spectral Density | 50 | nV/√Hz |
| Supply Voltage | ±5 | V |
| Operating Temperature Range | −40°C to +85°C | |
| Package Type | 8-Lead SOIC |
Key Features
- Simple Operation: Basic function is W = XY + Z, making it easy to integrate into various applications.
- High Differential Input Impedance: X, Y, and Z inputs have high impedance (100 kΩ || 2 pF), minimizing signal source loading.
- DC-Coupled Voltage Output: Simplifies use by providing a direct voltage output.
- Very Fast: Settles to 0.1% of full scale in 20 ns, with a small signal rise time of 1 ns.
- Complete and Versatile: Minimal external components required; can operate with voltage gains up to about ×10.
- Low Multiplier Noise: 50 nV/√Hz, making it suitable for low-level signal processing applications.
- High Output Current Capability: Can drive loads as low as 25 Ω.
Applications
- Very Fast Multiplication, Division, and Squaring: Ideal for high-speed mathematical operations.
- Wideband Modulation and Demodulation: Suitable for high-frequency communication systems.
- Phase Detection and Measurement: Used in applications requiring precise phase analysis.
- Sinusoidal Frequency Doubling: Effective in frequency multiplication tasks.
- Video Gain Control and Keying: Applied in video signal processing.
- Voltage-Controlled Amplifiers and Filters: Utilized in dynamic gain control and filtering applications.
Q & A
- What is the primary function of the AD835?
The AD835 generates the linear product of its X and Y voltage inputs, with an additional summing input Z, following the function W = XY + Z.
- What is the output bandwidth of the AD835?
The AD835 has an output bandwidth of 250 MHz.
- How fast does the AD835 settle to 0.1% of full scale?
The AD835 settles to 0.1% of full scale in 20 ns.
- What is the typical supply voltage for the AD835?
The AD835 operates from ±5 V supplies.
- What are the available package types for the AD835?
The AD835 is available in 8-lead PDIP and 8-lead SOIC packages.
- What is the operating temperature range of the AD835?
The AD835 operates over the −40°C to +85°C industrial temperature range.
- What is the noise spectral density of the AD835?
The AD835 has a low multiplier noise of 50 nV/√Hz.
- Can the AD835 drive low impedance loads?
Yes, the AD835 can drive loads as low as 25 Ω.
- What are some common applications of the AD835?
The AD835 is used in very fast multiplication, division, squaring, wideband modulation and demodulation, phase detection, sinusoidal frequency doubling, video gain control, and voltage-controlled amplifiers and filters.
- Why is the AD835 considered versatile?
The AD835 is versatile because it requires minimal external components, has high input impedances, and can operate with voltage gains up to about ×10.
