External Trigger; External Clock Input/Output - Measurement Computing E-1608 User Manual

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E-1608 User's Guide
Parameter
Input high voltage threshold
Input high voltage limit
Input low voltage threshold
Input low voltage limit
Output high voltage
Output low voltage
Power on and reset state
This is the typical throughput when the device and host are both connected by Ethernet to the same
Note 5:
local network. The throughput can vary significantly, and typical throughput is not guaranteed if a
wireless connection is involved or data is sent over the internet.

External trigger

Parameter
Trigger source
Trigger mode
Trigger latency
Trigger pulse width
Input type
Schmitt trigger hysteresis
Input high voltage threshold
Input high voltage limit
Input low voltage threshold
Input low voltage limit

External clock input/output

Parameter
Terminal names
Terminal types
Input clock rate
Clock pulse width
Clock mode
Input type
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Specification
2.0 V min
5.5 V absolute max
0.8 V max
–0.5 V absolute min
0 V recommended min
3.8 V typ at no load
3.0 V min (IOH = –3 mA)
2.0 V min (IOH = –32 mA)
0.15 V typ at no load
0.55 V max (IOL = 64 mA)
Input
Table 11. External trigger specifications
Condition Specification
External digital TRIG
Software-selectable Edge or level sensitive: user configurable for CMOS
compatible rising or falling edge, high or low level.
2 µs + 1 pacer clock cycle max
1 µs min
Schmitt trigger, 47 kΩ pull-down to ground
1.01 V typ
0.6 V min
1.5 V max
2.43 V typ
1.9 V min
3.1 V max
5.5 V absolute max
1.42 V typ
1.0 V min
2.0 V max
–0.5 V absolute min
0 V recommended min
Table 12. External clock I/O specifications
Specification
AICKI, AICKO
AICKI: Input (receives A/D pacer clock from external source)
AICKO: Output (outputs internal A/D pacer clock)
250 kHz max
AICKI: 1 µs min
AICKO: 1.8 µs min
Edge-sensitive, rising
Schmitt trigger, 47 kΩ pull-down to ground
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Specifications