Measurement Computing PCI-DAS6023 - Manual (Page 35)

PCI-DAS6023 and PCI-DAS6025 User's Guide Specifications
35
Analog output pacing and triggering
Table 13. Analog output pacing and triggering specifications
DAC pacing
(software programmable) Internal counter – ASIC. Selectable time base:

Internal 40 MHz, 50 ppm stability.
 External source via AUXIN<5:0>, SW selectable.
External convert strobe: D/A UPDATE
Software paced
DAC gate source
(software programmable) External digital: D/A START TRIGGER
Software gated
DAC gating modes External digital: Programmable, active high or active low, level or edge
DAC trigger sources External digital: D/A START TRIGGER
Software triggered
DAC triggering modes External digital: Software-configurable for rising or falling edge.
DAC pacer out Available at user connector: D/A PACER OUT
RAM buffer size 16 K samples
Data transfer DMA
Programmed I/O
Update DACs individually or simultaneously, software selectable.
DMA modes Demand or non-demand using scatter gather.
Waveform generation throughput 10 kS/s max per channel, 2 channels simultaneous
Analog input/output calibration
Table 14. Analog I/O calibration specifications
Recommended warm-up time 15 minutes
Calibration Auto-calibration, calibration factors for each range stored on board in non-volatile
RAM.
Onboard calibration reference DC Level: 10.000 V ± 5 mV. Actual measured values stored in EEPROM.
Tempco: 5 ppm/°C max, 2 ppm/°C typical
Long-term stability: 15 ppm, T = 1000 hrs, non-cumulative
Calibration interval 1 year
Digital input/output
Discrete
Table 15. Discrete DIO specifications
Digital type Discrete, 5V/TTL compatible
Number of I/O 8
Configuration 8 bits, independently programmable for input or output. All pins pulled up to +5 V
via 47 K resistors (default). Positions available for pull-down to ground (factory
configured option).
Input high voltage 2.0 V min, 7.0 V absolute max
Input low voltage 0.8 V max, –0.5 V absolute min
Output high voltage
(IOH = -32 mA)
3.80 V min, 4.20 V typ
Output low voltage (IOL = 32 mA) 0.55 V max, 0.22 V typ
Data transfer
Programmed I/O
Power-up / reset state Input mode (high impedance)