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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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AD632TH Fiches technique(PDF) 9 Page - Analog Devices |
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AD632TH Fiches technique(HTML) 9 Page - Analog Devices |
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9 / 13 page  AD632 Data Sheet Rev. D | Page 8 of 12 OPERATION AS A MULTIPLIER Figure 7 shows the basic connection for multiplication. Note that the circuit meets all specifications without trimming. Figure 7. Basic Multiplier Connection When needed, the user can 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. Figure 4 shows the typical ac feedthrough with this adjustment mode. Note that the feedthrough of the Y input is a factor of 10 lower than that of the X input and is to be used for applications where null suppression is critical. The Z2 terminal of the AD632 can be used to sum an additional signal into the output. In this mode, the output amplifier behaves as a voltage follower with a 1 MHz small signal bandwidth and a 20 V/μs slew rate. Always reference this terminal to the ground point of the driven system, particularly if this is remote. Like- wise, reference the differential inputs to their respective signal common potentials to realize the full accuracy of the AD632. A much lower scaling voltage can be achieved without any reduc- tion of input signal range using a feedback attenuator, as shown in Figure 8. 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 external adjustments necessary in some applications. Feedback attenuation also retains the capability for adding a signal to the output. Signals can be applied to the Z terminal, where they are amplified by −10, or to the common ground connection where they are amplified by −1. Input signals can also be applied to the lower end of the 2.7 kΩ resistor, giving a gain of +9. Figure 8. Connections for Scale Factor of Unity X1 +VS X2 VOS OUT Z1 Z2 Y1 Y2 –VS –15V +15V X INPUT ±10V FS ±12V PK Y INPUT ±10V FS ±12V PK OUTPUT, ±12V PK (X1 – X2) (Y1 – Y2) OPTIONAL SUMMING INPUT, Z, ±10V PK; VOS TERMINAL NOT USED 10 + Z2 = X1 +VS X2 OUT Z1 Z2 VOS Y1 Y2 –VS –15V +15V X INPUT ±10V FS ±12V PK Y INPUT ±10V FS ±12V PK OUTPUT, ±12V PK = (X1 – X2) (Y1 – Y2) (SCALE = 1) |
Numéro de pièce similaire - AD632TH |
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Description similaire - AD632TH |
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