Measurement-computing USB-1208FS-Plus-OEM Instrukcja Użytkownika Pobierz pdf (Strona 23)

USB-1208FS-Plus-OEM User's Guide Specifications

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 header pin

Resolution 32 bits

Maximum input frequency 1 MHz

High pulse width 500 ns min

Low pulse width 500 ns min

Schmitt trigger hysteresis 1.01 V typ

0.6 V min

1.5 V max

Input high voltage threshold 2.43 V typ

1.9 V min

3.1V max

Input high voltage limit 5.5 V absolute max

Input low voltage threshold 1.42 V typ

1.0 V min

2.0 V max

Input low voltage limit –0.5 V absolute min

0 V recommended min

Memory

Table 15. Memory specifications

Non-volatile EEPROM 2,048 bytes (768 bytes calibration, 256 bytes user, 1,024 bytes DAQFlex)

Microcontroller

Table 16. Microcontroller specifications

Type High performance 16-bit RISC microcontroller

Power

Table 17. Power specifications

Parameter Condition Specification

Supply current

During USB enumeration

< 100 mA

After USB enumeration, including DIO, AO, SYNC,

and +VO output loading

< 500 mA

+VO power available After USB enumeration 4.5 V min, 5.25 V max

+VO output current After USB enumeration 100 mA max

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