The AD834 is a monolithic, laser-trimmed four-quadrant analog multiplier intended for use in high frequency applications, with features such as high precision, low distortion and low power consumption. It features a gain-symmetric dual op amp circuit with differential inputs and differential outputs, and is suitable for high frequency signal processing applications such as high speed real time computation, wideband modulation and gain control, signal correlation and RF power measurement, voltage controlled filters and oscillators, linear keyers for high resolution television and wideband true RMS.
The AD834 is a monolithic, laser-trimmed four-quadrant analog multiplier intended for high-frequency applications. It features differential inputs and outputs, offering low distortion and performance that is relatively insensitive to temperature and supply variations due to stable band gap reference biasing.
In multiplier modes, the typical total full-scale error is 0.5%. The device provides a transconductance bandwidth in excess of 500 MHz from either of the differential voltage inputs when configured with a 50 Ω load. Outputs appear as a differential pair of currents at open collectors.
| Transconductance Bandwidth (RL = 50 Ω) | > 500 MHz |
|---|---|
| Total Full-Scale Error | ±0.5% FS |
| Supply Voltage Range | ±4 V to ±9 V |
| Low Power Consumption (Typical) | 280 mW |
| Full-Scale Input Range | Differential ±1 V |
| Full-Scale Output Current | Differential ±4 mA |
| Low Distortion (0 dBm input) | ≤ 0.05% |
The typical total full-scale error in multiplier modes is 0.5%, dependent on the application mode and external circuitry.
The commercial model (AD834J) operates from 0°C to 70°C, while industrial and military versions cover wider ranges.
The outputs appear as a differential pair of currents at open collectors, requiring external current-to-voltage conversion for single-ended voltage output.