GENERAL DESCRIPTION

The AD734 is an accurate high speed, four-quadrant analog multiplier that is pin compatible with the industry-standard AD534 and provides the transfer function W = XY/U. The AD734 provides a low impedance voltage output with a full power (20 V p-p) bandwidth of 10 MHz. Total static error (scaling, offsets, and nonlinearities combined) is 0.1 of full scale. Distortion is typically less than −80 dBc and guaranteed. The low capacitance X, Y, and Z inputs are fully differential. In most applications, no external components are required to define the function.

The internal scaling (denominator) voltage, U, is 10 V, derived from a buried-Zener voltage reference. A new feature provides the option of substituting an external denominator voltage, allowing the use of the AD734 as a two-quadrant divider with a 1000:1 denominator range and a signal bandwidth that remains 10 MHz to a gain of 20 dB, 2 MHz at a gain of 40 dB, and 200 kHz at a gain of 60 dB, for a gain-bandwidth product of 200 MHz.

FEATURES

High accuracy

0.1 typical error

High speed

10 MHz full power bandwidth

450 V/μs slew rate

200 ns settling to 0.1 at full power

Low distortion

−80 dBc from any input

Third-order IMD typically −75 dBc at 10 MHz

Low noise

94 dB SNR, 10 Hz to 20 kHz

70 dB SNR, 10 Hz to 10 MHz

Direct division mode

2 MHz BW at gain of 100