Analog Output Calibration; Digital Input/Output - Measurement Computing USB-3100 Series User Manual

USB-3105 User's Guide
The duration of this particular output transient is highly dependent on the enumeration process of
Note 2:
the host PC. Typically the output of the USB-3105 is stable after 2 seconds.
The maximum differential non-linearity specification applies to the entire 0 to 70 °C temperature
Note 3:
range of the USB-3105. 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

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
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
Conditions
Table 6. Digital I/O specifications
CMOS
8
Independently configured for input or output
User configurable
All pins floating (default)
TTL (default)
47K ohms (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.
Specifications
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
18
Specifications