Measurement Computing USB-1208FS-Plus - Manual (Page 25)

USB-1208FS-Plus User's Guide Specifications
25
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 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