OMB-DAQ-2408 Series User's Guide
Specifications
27
Parameter
Conditions
Specifications
Settling time
To rated accuracy, 10 V step
75
µ
S
Slew rate
1.0 V/µs
Throughput
Single-channel
1000 S/s max, system-dependent,
0.01 S/s min
Multi-channel
1000 S/s / #ch max, system-
dependent, 0.01 S/s min
Table 14. Calibrated absolute accuracy specifications
Range
Accuracy (±LSB)
±10 V
16.0
Table 15. Calibrated absolute accuracy components specifications
Range
% of reading
Offset (±mV)
Temp drift (%/°C)
Absolute accuracy at FS (±mV)
±10 V
±0.0183
1.831
0.00055
3.661
Table 16. Relative accuracy specifications
Range
Relative accuracy (±LSB)
±10 V
4.0 typ
Analog input/output calibration
Table 17. Analog input/output calibration specifications
Parameter
Specifications
Recommended warm-up time
45 minutes min
Calibration
Firmware calibration
Calibration interval
1 year
AI calibration reference
+10.000 V, ±5 mV max. Actual measured values stored in EEPROM
Tempco: 5 ppm/°C max
Long term stability: 30 ppm/1000 hours
AO calibration procedure
(OMB-DAQ-2408-2AO only)
The analog output pin is internally routed to the analog input pin.
AOUTx readback
(OMB-DAQ-2408-2AO only)
Each AOUT
x
output can be independently measured by the onboard A/D converter.
Software-selectable
Digital input/output
Table 18. Digital input specifications
Parameter
Specifications
Number of I/O
8 channels
Configuration
Each DIO bit can be independently read from (DIN) or written to (DOUT).
The DIN bits can be read at any time whether the DOUT is active or tri-stated.
Input voltage range
0 to +15 V
Input type
CMOS (Schmitt trigger)
Input characteristics
47 kΩ pull-up/pull-down resistor, 28 kΩ series resistor
Maximum input voltage range
0 V to +20 V max (power on/off, relative to DGND)
(Note 2)
Pull-up/pull-down
configuration
All pins pulled up to +5 V via individual 47 kΩ resistors (the J6 shorting block default
position is pins 1 and 2).
Pull down capability is available by placing the J6 shorting block across pins 2 and 3.
Transfer rate (software paced)
500 port reads or single bit reads per second typ.
Input high voltage
1.3 V min, 2.2 V max
