Overview
The AD835AR-REEL7, produced by Analog Devices Inc., is a complete four-quadrant, voltage output analog multiplier. It is fabricated on an advanced dielectrically isolated complementary bipolar process, offering state-of-the-art speed and versatility. The AD835 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. This component is designed to be simple to use, requiring minimal external components, and is suitable for a variety of high-speed signal processing applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Bandwidth | -3 dB | 250 | MHz | ||
| Small Signal Rise Time | 1 | ns | |||
| Full-Scale Rise/Fall Time | RL = 150 Ω | 2.5 | ns | ||
| Settling Time to 0.1% FS | RL = 150 Ω | 20 | ns | ||
| Differential Input Resistance | 100 kΩ || 2 pF | ||||
| Output Voltage Swing | RL = 150 Ω | ±2.0 | ±2.5 | V | |
| Voltage Noise Spectral Density | X = Y = 0 V, f < 10 MHz | 50 | nV/√Hz | ||
| Supply Voltage | ±5 | V | |||
| Operating Temperature Range | -40 | +85 | °C |
Key Features
- Simple and Complete Functionality: The basic function is W = XY + Z, requiring minimal external components.
- High Speed: Settles to 0.1% of full scale in 20 ns and has a small signal rise time of 1 ns.
- DC-Coupled Voltage Output: Simplifies use and provides a high differential input impedance for X, Y, and Z inputs.
- Low Multiplier Noise: 50 nV/√Hz, making it suitable for low-level signal processing applications.
- High Input Impedance: 100 kΩ || 2 pF, reducing signal source loading.
- High Output Current Capability: Can drive loads as low as 25 Ω.
- Voltage Gain Capability: The Z input allows operation with voltage gains up to about ×10.
Applications
- Very Fast Multiplication, Division, Squaring: Ideal for high-speed mathematical operations.
- Wideband Modulation and Demodulation: Suitable for various modulation and demodulation tasks.
- Phase Detection and Measurement: Used in phase detection and measurement applications.
- Sinusoidal Frequency Doubling: Effective for doubling sinusoidal frequencies.
- Video Gain Control and Keying: Applied in video gain control and keying applications.
- Voltage-Controlled Amplifiers and Filters: Used in voltage-controlled amplifiers and filters.
Q & A
- What is the output bandwidth of the AD835?
The output bandwidth of the AD835 is 250 MHz with a −3 dB small signal bandwidth.
- 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 rise time of the AD835?
The small signal rise time is typically 1 ns.
- What is the input impedance of the X, Y, and Z inputs?
The input impedance is 100 kΩ || 2 pF.
- What is the maximum output voltage swing of the AD835?
The maximum output voltage swing is ±2.5 V for RL = 150 Ω.
- What is the voltage noise spectral density of the AD835?
The voltage noise spectral density is 50 nV/√Hz for X = Y = 0 V and f < 10 MHz.
- What are the typical supply voltages for the AD835?
The typical supply voltages are ±5 V.
- What is the operating temperature range of the AD835?
The operating temperature range is from -40°C to +85°C.
- What are some common applications of the AD835?
Common applications include very fast multiplication, division, squaring, wideband modulation and demodulation, phase detection and measurement, sinusoidal frequency doubling, video gain control and keying, and voltage-controlled amplifiers and filters.
- What package options are available for the AD835?
The AD835 is available in 8-lead PDIP and 8-lead SOIC packages.
