Measurement Computing USB-3101 - Manual (Page 19)

USB-3101 User's Guide Specifications
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Note 2: The duration of this particular output transient is highly dependent on the enumeration process of
the host PC. Typically the output of the USB-3101 is stable after 2 seconds
Note 3: The maximum differential non-linearity specification applies to the entire 0 to 70 °C temperature
range of the USB-3101. 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.
Table 2. Absolute accuracy specifications – calibrated output
Range Accuracy (±LSB)
±10 V 14.0
0 to 10 V 22.0
Table 3. Absolute accuracy components specifications – calibrated output
Range % of reading Offset (±mV) Temp drift (%/°C) Absolute accuracy at FS (±mV)
±10 V ±0.0183 1.831 0.00055 3.661
0 to 10 V ±0.0183 0.915 0.00055 2.746
Table 4. Relative accuracy specifications
Range Relative accuracy (±LSB)
±10 V , 0 to 10 V 4.0 typ. 12.0 max.
Analog output calibration
Table 5. Analog output calibration specifications
Parameter Conditions Specifications
Recommended warm-up time 15 minutes min.
On-board precision reference DC level: 5.000 V ±1 mV max.
Tempco: ±10 ppm/°C max.
Long term stability: ±10 ppm/SQRT(1000 hrs)
Calibration method Software calibration
Calibration interval 1 year
Digital input/output
Table 6. Digital I/O specifications
Digital logic type CMOS
Number of I/O 8
Configuration Independently configured for input or output
Pull-up/pull-down configuration
(Note 4)
User configurable
All pins floating (default)
Digital I/O input loading TTL (default)
47K ohms (pull-up/pull down configurations)
Digital I/O transfer rate (system paced) System dependent, 33 to 1000 port reads/writes or single bit reads/writes per
second.
Input high voltage 2.0 V min, 5.5 V absolute max
Input low voltage 0.8 V max, –0.5 V absolute min
Output high voltage (IOH = –2.5 mA) 3.8 V min
Output low voltage (IOL = 2.5 mA) 0.7 V max
Power on and reset state Input