Digital Input / Output (Db37); External Trigger; Counter Section - Measurement Computing miniLAB 1008 User Manual

miniLAB 1008 User's Guide

Digital Input / Output (DB37)

Digital type
Number of I/O
Configuration
Pull up/pull-down configuration
Input high voltage
Input low voltage
Output high voltage (IOH = -2.5 mA)
Output low voltage (IOL = 2.5 mA)

External Trigger

Parameter
Trigger source
Trigger mode
Trigger latency
Trigger pulse width
Input high voltage
Input low voltage
Input leakage
current

Counter Section

Counter type
Number of channels
Input source
Resolution
Schmidt trigger hysteresis
Input leakage current
Maximum input frequency
High pulse width
Low pulse width
Input low voltage
Input high voltage
82C55
24 (Port A0 through Port C7)
2 banks of 8 and 2 banks of 4, or 3 banks of 8
All pins pulled up to Vs via 47 k resistors (default).
Positions available for pull down to ground.
Hardware selectable via zero ohm resistor.
2.0 V min, 5.5 V absolute max
0.8 V max, –0.5 V absolute min
3.0 V min
0.4 V max
Conditions Specification
External digital DIO[3:0], only DIO may be selected as a trigger
input
Software Level sensitive: user configurable for TTL level high
selectable or low input.
Burst 25 µs min, 50 µs max
Burst 40 µs min
3.0 V min, 15.0 V absolute max
0.8 V max
±1.0 µA
Event counter
1
CTR screw terminal
32 bits
20 mV to 100 mV
±1 µA
1 MHz
500 ns min
500 ns min
0 V min, 1.0 V max
4.0 V min, 15.0 V max
6-4
Specifications