Analog Output Calibration; Digital Input/Output - Measurement Computing USB-3103 User Manual

USB-3103 User's Guide
Note 3: The maximum differential non-linearity specification applies to the entire 0 to 70 °C temperature range of the
USB-3103. This specification also accounts for the maximum errors due to the software calibration algorithm
(in Calibrated mode only) and the DAC8554 digital to analog converter non-linearities.
Range Accuracy (±LSB)
±10 V 14.0
0 to 10 V 22.0
Table 3. Absolute accuracy components specifications – calibrated output
Range % of reading
±10 V ±0.0183
0 to 10 V ±0.0183
Range
±10 V , 0 to 10 V

Analog output calibration

Parameter
Recommended warm-up time
On-board precision reference
Calibration method
Calibration interval

Digital input/output

Parameter
Digital logic type
Number of I/O
Configuration
Pull-up/pull-down configuration
(Note 4)
Digital I/O input loading
Digital I/O transfer rate (system paced)
Input high voltage
Input low voltage
Output high voltage (IOH = –2.5 mA)
Output low voltage (IOL = 2.5 mA)
Power on and reset state
Note 4:
Pull up and pull down configuration area available using the DIO CTL terminal block pin 54. The pull-down
configuration requires the DIO CTL pin (pin 54) to be connected to a DGND pin (pin 50, 53 or 55). For a
pull-up configuration, the DIO CTL pin should be connected to the +5 V terminal pin (pin 56).
Table 2. Absolute accuracy specifications – calibrated output
Offset (±mV)
1.831
0.915
Table 4. Relative accuracy specifications
Relative accuracy (±LSB)
4.0 typ
Table 5. Analog output calibration specifications
Specification
15 minutes min
DC level: 5.000 V ±1 mV max
Tempco: ±10 ppm/°C max
Long term stability: ±10 ppm/SQRT(1000 hrs)
Software calibration
1 year
Table 6. Digital I/O specifications
Specification
CMOS
8
Independently configured for input or output
User configurable
All pins floating (default)
TTL (default)
47 kΩ (pull-up/pull-down configurations)
System dependent, 33 to 1000 port reads/writes or single bit reads/writes per
second.
2.0 V min, 5.5 V absolute max
0.8 V max, –0.5 V absolute min
3.8 V min
0.7 V max
Input
Temp drift (%/°C) Absolute accuracy at FS (±mV)
0.00055 3.661
0.00055 2.746
12.0 max
15
Specifications