AD734BQ Datasheet

Multipliers / Dividers


The AD734BQ is an accurate high speed, four-quadrant analog multiplier that is pin compatible with the industry-standard AD734BQ and provides the transfer function .The AD734BQprovides 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. Distortionis 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. The advanced performance of the AD734 is achieved by a combination of new circuit techniques, the use of a high speed complementary bipolar process, and a novel approach to laser trimming based on ac signals rather than the customary dc methods. The wide bandwidth (>40 MHz) of the AD734’s input stages and the 200 MHz gain-bandwidth product of the multiplier core allow the AD734BQ to be used as a low distortion demodulator with input frequencies as high as 40 MHz as long as the desired output frequency is less than 10 MHz. AD734BQ 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 AD734BQ Applications • High performance replacement for AD534 • Multiply, divide, square, square root • Modulators, demodulators • Wideband gain control, rms-to-dc conversion • Voltage-controlled amplifiers, oscillators, and filters • Demodulator with 40 MHz input bandwidth


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