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GEN7iB

156

INTERFACE/CONTROLLER

11.4.1 I/O connector input overvoltage protection

All inputs of the I/O connector are over voltage protected. All inputs use the following

schematic approach.

7RV\VWHPWLPEDVHWULJJHU

DQGUHFRUGLQJFRQWURO

)URPLQSXWFRQQHFWR

9

N2KP

N2KP

9

Fig. 11.11 I/O connector schematic inputs

Duetothe20kΩpull-upresistorallinputswillbe“TTLHigh”andonlyneedanexternal

shorttosignalgroundtobeoperated.The2kΩseriesresistortogetherwiththediode

clampstogroundand+5Vprotectthedigitalcircuitryuptothespeciedvoltages.

The clamping diodes and other parasitic capacitors do create a capacitive load on

your signal source and limit the signal bandwidth. To reach the required bandwidths

detailed compensations are made not addressed in this block diagram.

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HBK GEN7iB GEN Series Specifications

General