PWM mit digitalen Output realisieren

guten morgen...

bei dem link zu dem beispiel steht, dass man das normalerweise mit Countern erzeugt. Ich bin mir nicht sicher ob ameine Karte vielleicht nicht sowas besitzt. darum stelle ich mal die spezifikationen meiner karte rein. wenn es mit countern einfach gehr (obwohl ich da auch nicht wirklich einen schimmer hab möchte ich es natürlich so ausprobieren)!!!

ist jetzt ziemlich ungeordnet, aber irgendwelche counter scheine ich schon zu haben!

DAQCard-AI-16XE-50
Analog Input
Input Characteristics
Number of channels ...........................16 single-ended or 8 differential
(software-selectable)
Type of ADC .....................................Successive approximation
Resolution..........................................16 bits, 1 in 65,536
Maximum sampling rate.....................200 kS/s (single-channel),
20 kS/s guaranteed
(scanning; gain = 1, 2, 10),
17 kS/s (scanning; gain = 100)
Input coupling ....................................DC
Maximum working voltage
(signal + common mode) ............ The average voltage of each
differential pair should remain
within
±
8 V of ground
Overvoltage protection.......................
±
25 V powered on,
±
15 V
powered off
Inputs protected .......................... ACH<0..15>, AISENSE
FIFO buffer size.................................1,024 S
Data transfers .....................................DMA, interrupt, programmed
I/O
DMA modes.......................................Single transfer, demand transfer
Configuration memory size ................512 words
Input signal ranges .................
Board Gain
(Software
Selectable)
Board Range
(Software Selectable)
Bipolar Unipolar
1
±
10 V 0 to 10 V
2
±
5 V 0 to 5 V
10
±
1 V 0 to 1 V
100
±
0.1 V 0 to 0.1 V
Appendix A Specifications for DAQCard-AI-16XE-50
Ó
National Instruments Corporation A-9 DAQCard E Series User Manual
Transfer Characteristics
Relative accuracy ..............................
±
1.5 LSB typ,
±
1.75 LSB max
DNL.................................................. +1.5, -0.75 LSB typ,
+1.75, -1.0 LSB max
No missing codes .............................. 16 bits, guaranteed
Offset error
Pregain error after calibration .....
±
3
m
V max
Pregain error before calibration...
±
280
m
V max
Postgain error after calibration....
±
162
m
V max (bipolar),
±
81
m
V max (unipolar)
Postgain error before calibration .±37.5 mV max (bipolar),
±175.75 mV max (unipolar)
Gain error (relative to calibration reference)
After calibration (gain = 1) .........±7.6 ppm of reading max
Before calibration .......................±27,650 ppm of reading max
With gain error adjusted to 0 at gain = 1
Gain = 2, 10 ................................±100 ppm of reading
Gain = 100 ..................................±250 ppm of reading
Amplifier Characteristics
Input impedance
Normal, powered on.................... 7 GW in parallel with 100 pF
Powered off ................................ 1 kW min
Overload ..................................... 1 kW min
Input bias current .............................. ±10 nA
Input offset current............................ ±14 nA
CMRR, DC to 60 Hz
Gain = 1 ...................................... 80 dB
Gain = 2 ...................................... 86 dB
Gain = 10 .................................... 100 dB
Gain = 100 .................................. 120 dB
Appendix A Specifications for DAQCard-AI-16XE-50
DAQCard E Series User Manual A-10 Ó National Instruments Corporation
Dynamic Characteristics
Bandwidth
Gain = 1, 2 .................................. 69 kHz
Gain = 10 .................................... 66 kHz
Gain = 100 .................................. 39 kHz
Settling time for full-scale step
Gain = 1, 2, 10 ............................ 50 ms max to ±1 LSB
Gain = 100 .................................. 60 ms max to ±1 LSB
50 ms typ to ±4 LSB
System noise (including quantization noise)
Gain = 1, 2, 10 ............................ 1.0 LSB rms
Gain = 100 .................................. 1.2 LSB rms bipolar,
1.6 LSB rms unipolar
Crosstalk ........................................... -85 dB max, DC to 20 kHz
Stability
Recommended warm-up time ............ 15 min
Offset temperature coefficient
Pregain........................................±1 mV/°C
Postgain ......................................±120 mV/°C
Gain temperature coefficient ............. ±15 ppm/°C
Onboard calibration reference
Level ................................................. 5.000 V (±2.5 mV) (actual value
stored in EEPROM)
Temperature coefficient .................... ±5 ppm/°C max
Long-term stability............................ ±15 ppm/ 1, 000 h
Appendix A Specifications for DAQCard-AI-16XE-50
Ó National Instruments Corporation A-11 DAQCard E Series User Manual
Digital I/O
Number of channels .......................... 8 input/output
Compatibility .................................... TTL/CMOS
Power-on state................................... Input (High-Z) pulled up via
100 kW
Data transfers .................................... Programmed I/O
Timing I/O
Number of channels .......................... 2 up/down counter/timers,
1 frequency scaler
Resolution
Counter/timers ............................ 24 bits
Frequency scaler ......................... 4 bits
Compatibility .................................... TTL/CMOS
Base clocks available
Counter/timers ............................ 20 MHz, 100 kHz
Frequency scaler ......................... 10 MHz, 100 kHz
Base clock accuracy .......................... ±0.01%
Max source frequency ....................... 20 MHz
Min source pulse duration ................ 10 ns, edge-detection mode
Min gate pulse duration .................... 10 ns, edge-detection mode
Data transfers .................................... DMA, interrupts,
programmed I/O
Digital logic levels .......... Level Min Max
Input low voltage 0 V 0.8 V
Input high voltage 2 V 5 V
Input low current — -320 mA
Input high current — 10 mA
Output low voltage
(I
OL
= 24 mA)
— 0.4 V
Output high voltage
(I
OH
= 13 mA)
4.35 V —
Appendix A Specifications for DAQCard-AI-16XE-50
DAQCard E Series User Manual A-12 Ó National Instruments Corporation
DMA modes...................................... Single transfer, demand transfer
Triggers
Digital Trigger
Compatibility .................................... TTL
Response ........................................... Rising or falling edge
Pulse width........................................ 10 ns min
Power Requirement
+5 VDC (±5%).................................. 230 mA active,
90 mA standby
Power available at I/O connector....... +4.65 to +5.25 VDC
at 250 mA
Note: You can save current by using the NI-DAQ power down utility when your
DAQCard is not in use.
Physical
PC Card type ..................................... Type II
I/O connector .................................... PCMCIA 68-position female
connector
Environment
Operating temperature ....................... 0° to 55° C
Storage temperature........................... -55° to 150° C
Relative humidity .............................. 5% to 90% noncondensing


mfg und großem dank

christian