Analog Devices Inc. AD835ARZ-REEL7

AD835ARZ-REEL7 Wideband Analog Multiplier, Four-Quadrant Multiplier IC

The AD835ARZ-REEL7 from Analog Devices is a high-performance, voltage-output four-quadrant analog multiplier that operates from DC to 250 MHz, delivering exceptional accuracy and versatility in signal processing applications.  It computes the product of two differential input voltages (X and Y) divided by a scaling factor (U) and adds a summing input (Z), implementing the function W = (X*Y)/U + Z with a typical multiplication error of less than 0.5%.  Designed for ease of use, it requires no external components for basic operation and provides a simplified alternative to log-antilog multiplier techniques, making it ideal for modulation, demodulation, squaring, and frequency doubling circuits in communications, instrumentation, and video systems.

Key Electrical Characteristics

The AD835ARZ-REEL7 excels with its wide bandwidth, high speed, and low distortion.  It features a full power bandwidth of 250 MHz (for 2 Vpp output) and a small signal bandwidth of 500 MHz, ensuring precise operation into the VHF range.  Key specifications include a typical feedforward error of 0.05%/°C, a differential input voltage range of ±2 V, and a single-ended output voltage swing of ±2.5 V into a 150 Ω load.  With a low harmonic distortion of -65 dBc at 10 MHz and a fast settling time of 15 ns to 0.1%, it provides clean, accurate real-time analog computation for dynamic signals without compromising signal integrity.

Application Scenarios

The AD835ARZ-REEL7 is widely used in RF and IF signal processing systems, including amplitude modulation/demodulation, phase detection, and automatic gain control (AGC) loops.  It serves as a key component in precision squaring circuits for RMS-to-DC conversion, frequency doubling in synthesizers, and adaptive filter designs.  Additionally, it finds applications in video graphics for chroma keying and motion detection, as well as in radar and lidar systems for pulse compression and correlation.  Its DC-coupled operation also makes it suitable for wideband instrumentation and test equipment where high-speed analog computation is critical.

Alternative Part Numbers

● AD534: A precision analog multiplier with onboard reference and adjustable scaling, offering higher accuracy for low-frequency applications.

● AD633: A low-cost four-quadrant analog multiplier with a simplified 10V scaling factor, ideal for general-purpose signal processing.

● MPY634: A wideband analog multiplier from Texas Instruments featuring adjustable scaling and high-speed operation up to 200 MHz.

● AD539: A dual, high-performance analog multiplier designed for complex computations in communications and control systems.