Measurement-computing USB-1608GX-2AO Instrukcja Użytkownika Pobierz pdf (Strona 21)

USB-1608GX-2AO User's Guide Specifications

Timer

Table 14. Timer specifications

Parameter

Specification

Terminal name

TMR

Timer type

PWM output with count, period, delay, and pulse width registers

Output value

Default state is idle low with pulses high, software-selectable output invert

Internal clock frequency

64 MHz

32-bit

High pulse width

15.625 ns min

Low pulse width

15.625 ns min

Output high voltage

4.4 V min (IOH = –50 µA)

3.76 V min (IOH = –2.5 mA)

Output low voltage

0.1 V max (IOL = 50 µA)

0.44 V max (IOL = 2.5 mA)

Output current

±2.5 mA max

Memory

Table 15. Memory specifications

Parameter

Specification

Data FIFO

4 kS analog input/2 kS analog output

Non-volatile memory

32 KB (28 KB firmware storage, 4 KB calibration/user data)

Power

Table 16. Power specifications

Parameter

Condition

Specification

Supply current (Note 3)

Quiescent current

260 mA

+5 V user output voltage range

Available at terminal block pin 42

4.5 V min to 5.25 V max

+5 V user output current

Available at terminal block pin 42

10 mA max

Note 3: This is the total quiescent current requirement for the device that includes up to 10 mA for the Status

LED. This does not include any potential loading of the digital I/O bits, +5V terminal, or the AOUTx

outputs.

USB

Table 17. USB specifications

Parameter

Specification

USB device type

USB 2.0 (high-speed)

Device compatibility

USB 1.1, USB 2.0

USB cable type

A-B cable, UL type AWM 2725 or equivalent. (Min 24 AWG VBUS/GND,

min 28 AWG D+/D–)

USB cable length

3 m (9.84 ft) max

1 2 ... 16 17 18 19 20 21 22 23 24 25

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