Analog Current Output - Measurement Computing USB-3102 User Manual

USB-3102 User's Guide
Note 2: The USB-3102 output voltage level defaults to 0V whenever the output voltage range is
reconfigured.
The USB-3102 output voltage level will also default to 0V:
1) Whenever the host PC is reset, shut down or suspended.
2) If a reset command is issued to the device.
Note 3: The duration of this particular output transient is highly dependent on the enumeration process of
the host PC. Typically the output of the USB-3102 is stable after 2 seconds.
The maximum differential non-linearity specification applies to the entire 0 to 50 °C temperature
Note 4:
range of the USB-3102. 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 current output

Parameter
Number of channels
(Note 5)
Resolution
Output ranges
Compliance voltage range
(Note 6)
Differential non-linearity (Note 7)
Absolute accuracy
IOUTx leakage current
Settling time
Throughput
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 current output specifications
Conditions
Calibrated
Uncalibrated
Calibrated output
Calibrated
Un-calibrated
Compliance voltage = +13V
Resistive load = 100Ω
All zeros written to IOUTx
channel
Full scale step to 1LSB accuracy
Compliance voltage = 12V,
Rload = 500Ω
Single-channel
Multi-channel
Temp drift (%/°C) Absolute accuracy at FS (±mV)
0.00055 3.661
0.00055 2.746
12.0 max.
Specifications
4
16 bits
0 to 20 mA typ.
0 to 25 mA typ.
+8 V min.
+36 V max.
±1.25 LSB typ.
-2 LSB to +1 LSB max.
±0.25 LSB typ.
-1 LSB to +1 LSB max.
±0.05% of full scale range
100nA typ. (each individual IOUT
channel)
25 µS typ.
100 Hz max., system dependent
100 Hz/#ch max., system dependent
20
Specifications