Datasheet AD734 (Analog Devices)

10 MHz, Four-Quadrant Multiplier/Divider AD734 FEATURES FUNCTIONAL BLOCK DIAGRAM High accuracy AD734 0.1% typical error X1 X = X High speed XIF 1 – X2 HIGH ACCURACY X2 TRANSLINEAR CORE 10 MHz full power bandwidth DD 450 V/μs slew rate U 200 ns settling to 0.1% at full power DENOMINATOR XZ + XY ÷ U – Z WIF CONTROL W U Low distortion U0 – −80 dBc from any input U1 ER AO ∞ R Third-order IMD typically −75 dBc at 10 MHz U U2 Low noise Y1 Y = Y1 – Y2 Z = Z1 – Z2 Z1 YIF ZIF
03
94 dB SNR, 10 Hz to 20 kHz
0
Y2 Z2
7- 82
70 dB SNR, 10 Hz to 10 MHz
00
Direct division mode
Figure 1.
2 MHz BW at gain of 100 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 GENERAL DESCRIPTION
The AD734 is an accurate high speed, four-quadrant analog 10 MHz to a gain of 20 dB, 2 MHz at a gain of 40 dB, and 200 kHz multiplier that is pin compatible with the industry-standard at a gain of 60 dB, for a gain-bandwidth product of 200 MHz. AD534 and provides the transfer function W = XY/U. The The advanced performance of the AD734 is achieved by a AD734 provides a low impedance voltage output with a full combination of new circuit techniques, the use of a high speed power (20 V p-p) bandwidth of 10 MHz. Total static error complementary bipolar process, and a novel approach to laser (scaling, offsets, and nonlinearities combined) is 0.1% of full trimming based on ac signals rather than the customary dc scale. Distortion is typically less than −80 dBc and guaranteed. methods. The wide bandwidth (>40 MHz) of the AD734’s input The low capacitance X, Y, and Z inputs are fully differential. stages and the 200 MHz gain-bandwidth product of the multiplier In most applications, no external components are required to core allow the AD734 to be used as a low distortion demodulator define the function. with input frequencies as high as 40 MHz as long as the desired The internal scaling (denominator) voltage, U, is 10 V, derived output frequency is less than 10 MHz. from a buried-Zener voltage reference. A new feature provides The AD734AQ and AD734BQ are specified for the industrial the option of substituting an external denominator voltage, temperature range of −40°C to +85°C and come in a 14-lead allowing the use of the AD734 as a two-quadrant divider with a CERDIP and a 14-lead PDIP package. The AD734SQ/883B, 1000:1 denominator range and a signal bandwidth that remains available processed to MIL-STD-883B for the military range of −55°C to +125°C, is available in a 14-lead CERDIP.
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Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS FUNCTIONAL DESCRIPTION AVAILABLE TRANSFER FUNCTIONS DIRECT DENOMINATOR CONTROL OPERATION AS A MULTIPLIER Standard Multiplier Connections Current Output Squaring and Frequency-Doubling OPERATION AS A DIVIDER Feedback Divider Connections Connections for Square-Rooting DIVISION BY DIRECT DENOMINATOR CONTROL A PRECISION AGC LOOP WIDEBAND RMS-TO-DC CONVERTER USING U INTERFACE LOW DISTORTION MIXER OUTLINE DIMENSIONS ORDERING GUIDE