Agilent-technologies Option H48 Multiport Test Set Z5623A Uživatelský manuál stáhnout pdf (Strana 119)

Agilent Technologies Z5623A Option H48 7 -7

Advanced Topics

Using the Control Lines Connector

Figure 7-1 Control Lines

Suggested External Circuitry

Figure 7-2 shows one possible set of external circuitry for use with the

Control Lines connector. The integrated circuit (IC) shown in the figure

is a quad single-pole-single-throw (SPST) CMOS analog switch

(Temic/Siliconix Part No. DG413). The IC contains two normally open

and two normally closed switches.

Notice that, when “C1_in” is in the “Open” state, there will be no

current through the 10 kΩ resistor and, consequently, no voltage drop

across it. This means that +15 V will be applied to the control line when

it is in the “Open” state. (The maximum allowable is +22 V.) When

“C1_in” is in the “Low” state, it will sink (15 V - 0.63 V) / 10 kΩ = 1.44

mA of current. (The maximum allowable is 250 mA per control line.)

The values computed in this paragraph do not depend on V

, the

voltage used to control the DUT. (V

is applied to pin 3 in Figure 7-2.)

Ground

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Agilent-technologies Option H48 Multiport Test Set Z5623A Uživatelský manuál Strana 119