Key Digital ES381 Bedienungsanleitung PDF herunterladen (Seite 16)

2.4 Input Control

2.4.1 Input Supply

The USBcount50 supports a programmable input supply via the

slider control.

Supplies from 1.50V to 5.00V are possible, and the slider control

adjusts in 256 steps of 13.67mV per step. This range allows the user

to match against common industry standard logic levels present in

their circuit to be measured

Elan Digital Systems Ltd. 16 USBcount50 USER’S GUIDE Iss1

Note that the input switching threshold is not a linear function of the supply voltage, rather the

threshold varies in steps as the supply voltage is increased, corresponding to the Vih specifications for

1.8V, 2.5V, 3.0V, 3.3V and 5.0V logic domains.

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Key Digital ES381 Bedienungsanleitung Seite 16