Appendix A: Specifications
44
Note Due to the quad DACs, the current is limited. Only one
output of each may be continuously shorted to ground. The
current is limited to 40 ma for PD2-AO-8[16][32] boards and
20 ma for all other models.
Digital Input and Output
Parameter Value
Number of channels
8 inputs and 8 outputs
Compatibility
CMOS/TTL, 2KV ESD protected
Power-on state
Logic Zero
Input termination
4.7Kohm pull-up to 5V
Output High Level
3.0V min @ -32 mA, 3.4V min @ -16 mA,
4.2V min @ -2 mA
Output Low Level
0.55V max @ 64 mA
Input Low Voltage
0.0 - 0.8 V
Input High Voltage
2.0 - 5.0 V
Input current
1uA
DSP – based subsystems
There are two DSP-based subsystems available on the PowerDAQ DIO
boards:
•
Counter/timers
•
High-speed interrupts
DC ELECTRICAL CHARACTERISTICS FOR DSP-
BASED SUBSYSTEMS
Counter/timers
Parameter Value
Number of channels
3
Resolution 24
bits
Maximum frequency
16.5/25MHz for the external,
33/50 MHz for the internal clock (see notes)
Minimum frequency
DC for input, 0.001Hz for output
Minimum Pulse Width
20 nS
Содержание PowerDAQ PDXI-AO Series
Страница 9: ...1 1 Introduction...
Страница 15: ...7 2 Installation and Configuration...
Страница 26: ...Chapter 2 Installation and Configuration 18...
Страница 27: ...19 3 Architecture...
Страница 38: ...Chapter 3 Architecture 30...
Страница 39: ...31 4 API and Third Party Software Examples...
Страница 43: ...35 5 Interconnections...