Measurement-computing PCIe-DAS1602/16 Instrukcja Użytkownika Pobierz pdf (Strona 20)

PCIe-DAS1602/16 User's Guide Specifications

Counter

Counter type 82C54

Configuration 3 down counters, 16 bits each

Counter 1 source (software-selectable)



External source from main connector: pin 21 (Note3)



100 kHz internal source

Counter 1 gate External gate from main connector: pin 24 (Note3)

Counter 1 output Available at main connector: pin 2

Counter 2 source (jumper-selectable)



Internal 1 MHz



Internal 10 MHz

Counter 2 gate (software-selectable) External source from main connector: pin 25 (Note3)

Counter 2 output Internal only, chained to counter 3 source

Counter 3 source Counter 2 output

Counter 3 gate (software-selectable) External source from main connector: pin 25 (Note3)

Counter 3 output Available at main connector: pin 20

Programmable as ADC pacer clock.

Clock input frequency

10 MHz max

High pulse width (clock input) 30 ns min

Low pulse width (clock input) 50 ns min

Gate width high 50 ns min

Gate width low 50 ns min

Input high 2.0 V min, 5.5 V absolute max

Input low

0.8 V max, –0.5 V absolute min

Output high 3.0 V min @ –2.5 mA

Output low 0.4 V max @ 2.5 mA

Crystal oscillator frequency 10 MHz

Frequency accuracy 50 ppm

Note 3: Pins 21, 24, and 25 are pulled to logic high via 47 K resistors.

Environmental

Operating temperature range 0 °C to 70 °C

Storage temperature range –40 °C to 100°C

Humidity 0% to 95% non-condensing

Mechanical

Card dimensions (L × W × H) 168 × 111 × 19 mm (6.6 × 4.4 × 0.7 in.)

1 2 ... 15 16 17 18 19 20 21 22 23 24

Brak uwag

Measurement-computing PCIe-DAS1602/16 Instrukcja Użytkownika Strona 20