250 MHz, Voltage Output 4-Quadrant Multiplier
Its differential multiplication inputs (X, Y) and its summing input (Z) are at high impedance. The low impedance output voltage (W) can provide up to ±2.5 V and drive loads as low as 25 Ω. Normal operation is from ±5 V supplies.
Though providing state-of-the-art speed, the AD835 is simple to use and versatile. For example, as well as permitting the addition of a signal at the output, the Z input provides the means to operate the AD835 with voltage gains up to about ×10. In this capacity, the very low product noise of this multiplier (50 nV/√Hz) makes it much more useful than earlier products.
The AD835 is available in an 8-lead PDIP package (N) and an 8-lead SOIC package (R) and is specified to operate over the −40°C to +85°C industrial temperature range.
- The AD835 is the first monolithic 250 MHz, four-quadrant voltage output multiplier.
- Minimal external components are required to apply the AD835 to a variety of signal processing applications.
- High input impedances (100 kΩ||2 pF) make signal source loading negligible.
- High output current capability allows low impedance loads to be driven.
- State-of-the-art noise levels achieved through careful device optimization and the use of a special low noise, band gap voltage reference.
- Designed to be easy to use and cost effective in applications that require the use of hybrid or board-level solutions.
- Very fast multiplication, division, squaring
- Wideband modulation and demodulation
- Phase detection and measurement
- Sinusoidal frequency doubling
- Video gain control and keying
- Voltage-controlled amplifiers and filters
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At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
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