Measurement-computing BTH-1208LS Manuel d'utilisateur télécharger pdf (Page 24)

BTH-1208LS User's Guide Specifications

Input low voltage threshold 0.98 V typ

0.6 V min

1.5 V max

Input low voltage limit –0.5 V absolute min

0 V recommended min

External clock input

Table 13. External clock input specifications

Parameter Specification

Terminal name AICKI

Terminal type Input

Input clock rate 50 kHz, max

Clock pulse width 1 µs min

Input type Schmitt trigger, 47 kΩ pull-down to ground

Schmitt trigger hysteresis 0.76 V typ

0.4 V min

1.2 V max

Input high voltage threshold 1.74 V typ

1.3 V min

2.2 V max

Input high voltage limit 5.5 V absolute max

Input low voltage threshold 0.98 V typ

0.6 V min

1.5 V max

Input low voltage limit –0.5 V absolute min

0 V recommended min

Counter

Table 14. Counter specifications

Parameter Specification

Pin name

CTR

Counter type Event counter

Number of channels 1

Input type Schmitt trigger, 47 kΩ pull-down to ground, rising edge triggered

Input source CTR screw terminal

Resolution 32 bits

Maximum input frequency 1 MHz

High pulse width 500 ns min

Low pulse width 500 ns min

Schmitt trigger hysteresis 0.76 V typ

0.4 V min

1.2 V max

Input high voltage threshold 1.74 V typ

1.3 V min

2.2 V max

Input high voltage limit 5.5 V absolute max

Input low voltage threshold 0.98 V typ

0.6 V min

1.5 V max

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Measurement-computing BTH-1208LS Manuel d'utilisateur Page 24

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