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AD632TH Fiches technique(PDF) 4 Page - Analog Devices |
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AD632TH Fiches technique(HTML) 4 Page - Analog Devices |
4 / 6 page AD632 –4– REV. A Typical Performance Curves (typical @ +25 C with VS = 15 V) Figure 1. AC Feedthrough vs. Frequency Figure 2. Frequency Response as a Multiplier Figure 3. Frequency Response vs. Divider Denominator Input Voltage Figure 4. AD632 Functional Block Diagram OPERATION AS A MULTIPLIER Figure 5 shows the basic connection for multiplication. Note that the circuit will meet all specifications without trimming. Figure 5. Basic Multiplier Connection In some cases the user may wish to reduce ac feedthrough to a minimum (as in a suppressed carrier modulator) by applying an external trim voltage ( ±30 mV range required) to the X or Y input. Curve 1 shows the typical ac feedthrough with this ad- justment mode. Note that the feedthrough of the Y input is a factor of 10 lower than that of the X input and should be used in applications where null suppression is critical. The Z2 terminal of the AD632 may be used to sum an addi- tional signal into the output. In this mode the output amplifier behaves as a voltage follower with a 1 MHz small signal band- width and a 20 V/ µs slew rate. This terminal should always be referenced to the ground point of the driven system, particularly if this is remote. Likewise the differential inputs should be refer- enced to their respective signal common potentials to realize the full accuracy of the AD632. A much lower scaling voltage can be achieved without any re- duction of input signal range using a feedback attenuator as shown in Figure 6. In this example, the scale is such that VOUT = XY, so that the circuit can exhibit a maximum gain of 10. This connection results in a reduction of bandwidth to about 80 kHz without the peaking capacitor CF. In addition, the output offset voltage is increased by a factor of 10 making exter- nal adjustments necessary in some applications. |
Numéro de pièce similaire - AD632TH |
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Description similaire - AD632TH |
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