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a FEATURES Four-Quadrant Multiplication Low Cost 8-Pin Package Complete—No External Components Required Laser-Trimmed Accuracy and Stability Total Error Within 2% of FS Differential High Impedance X and Y Inputs High Impedance Unity-Gain Summing Input Laser-Trimmed 10 V Scaling Reference APPLICATIONS Multiplication, Division, Squaring Modulation/Demodulation, Phase Detection Voltage-Controlled Amplifiers/Attenuators/Filters

Low Cost Analog Multiplier AD633 CONNECTION DIAGRAMS 8-Pin Plastic DIP (N) Package

X1

1

X2

2

Y1

3

Y2

4

8 +VS

1 A

7

1

AD633JN

W

6

1 10V

Z

5

–VS

8-Pin Plastic SOIC (R) Package

PRODUCT DESCRIPTION

The AD633 is a functionally complete, four-quadrant, analog multiplier. It includes high impedance, differential X and Y inputs and a high impedance summing input (Z). The low impedance output voltage is a nominal 10 V full scale provided by a buried Zener. The AD633 is the first product to offer these features in modestly priced 8-pin plastic DIP and SOIC packages. The AD633 is laser calibrated to a guaranteed total accuracy of 2% of full scale. Nonlinearity for the Y-input is typically less than 0.1% and noise referred to the output is typically less than 100 µV rms in a 10 Hz to 10 kHz bandwidth. A 1 MHz bandwidth, 20 V/µs slew rate, and the ability to drive capacitive loads make the AD633 useful in a wide variety of applications where simplicity and cost are key concerns. The AD633’s versatility is not compromised by its simplicity. The Z-input provides access to the output buffer amplifier, enabling the user to sum the outputs of two or more multipliers, increase the multiplier gain, convert the output voltage to a current, and configure a variety of applications. The AD633 is available in an 8-pin plastic mini-DIP package (N) and 8-pin SOIC (R) and is specified to operate over the 0°C to +70°C commercial temperature range.

Y1

1

Y2

2

–VS

3

Z

4

X2 X1

6

+VS

5

1 10V

8 7

1

1

W

A

AD633JR W=

( X 1 – X 2 ) (Y 1 –Y 2 ) 10V

Z

PRODUCT HIGHLIGHTS

1. The AD633 is a complete four-quadrant multiplier offered in low cost 8-pin plastic packages. The result is a product that is cost effective and easy to apply. 2. No external components or expensive user calibration are required to apply the AD633. 3. Monolithic construction and laser calibration make the device stable and reliable. 4. High (10 MΩ) input resistances make signal source loading negligible. 5. Power supply voltages can range from ± 8 V to ± 18 V. The internal scaling voltage is generated by a stable Zener diode; multiplier accuracy is essentially supply insensitive.

REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703


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