Datasheet AD539 (Analog Devices)

Wideband Dual-Channel Linear Multiplier/Divider AD539 FEATURES FUNCTIONAL BLOCK DIAGRAM 2-quadrant multiplication/division 6kΩ AD539 W1 2 independent signal channels Signal bandwidth of 60 MHz (I VY1 CHAN1 OUTPUT
×
OUT) 6kΩ Linear control channel bandwidth of 5 MHz Z1 Low distortion (to 0.01%) VX 6kΩ Fully calibrated, monolithic circuit Z2 APPLICATIONS VY2 CHAN2 OUTPUT
×
6kΩ
1 00
W2 Precise high bandwidth AGC and VCA systems
9- 67 09
Voltage-controlled filters
Figure 1.
Video signal processing High speed analog division Automatic signal-leveling Square-law gain/loss control GENERAL DESCRIPTION
The AD539 is a low distortion analog multiplier having two they can be used independently, as in audio stereo applications, identical signal channels (Y1 and Y2), with a common X input with low crosstalk between channels. Voltage-controlled filters providing linear control of gain. Excellent ac characteristics up and oscillators using the state-variable approach are easily to video frequencies and a −3 dB bandwidth of over 60 MHz are designed, taking advantage of the dual channels and common provided. Although intended primarily for applications where control. The AD539 can also be configured as a divider with speed is important, the circuit exhibits good static accuracy in signal bandwidths up to 15 MHz. computational applications. Scaling is accurately determined by Power consumption is only 135 mW using the recommended a band-gap voltage reference and all critical parameters are ±5 V supplies. The AD539 is available in three versions: the J laser-trimmed during manufacture. and K grades are specified for 0 to 70°C operation and S grade is The full bandwidth can be realized over most of the gain range guaranteed over the extended range of −55°C to +125°C. The J and using the AD539 with simple resistive loads of up to 100 Ω. K grades are available in either a hermetic ceramic SBDIP (D-16) Output voltage is restricted to a few hundred millivolts under or a low cost PDIP (N-16), whereas the S grade is available in these conditions. ceramic SBDIP (D-16) or LCC (E-20-1). The S grade is availa- The two channels provide flexibility. In single-channel applications, ble in MIL-STD-883 and Standard Military Drawing (DESC) they can be used in parallel to double the output current, in Number 5962-8980901EA versions. series to achieve a square-law gain function with a control range of over 100 dB, or differentially to reduce distortion. Alternatively,
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Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT DESCRIPTION GENERAL RECOMMENDATIONS TRANSFER FUNCTION DUAL SIGNAL CHANNELS COMMON CONTROL CHANNEL FLEXIBLE SCALING APPLICATIONS INFORMATION BASIC MULTIPLIER CONNECTIONS Signal Channel AC and Transient Response Minimal Wideband Configurations Differential Configurations A 50 MHZ VOLTAGE-CONTROLLED AMPLIFIER BASIC DIVIDER CONNECTIONS Standard Scaling OUTLINE DIMENSIONS ORDERING GUIDE