Measurement Computing USB-1608FS-Plus - Manual (Page 18)

USB-1608FS-Plus User's Guide Specifications
18
Table 3. Accuracy components - All values are (±)
Range Gain error
(% of Reading)
Gain error at FS
(mV) Offset (mV)
±10 V 0.04 4.00 1.66
±5 V 0.04 2.00 0.98
±2 V 0.04 0.80 0.51
±1 V 0.04 0.40 0.28
Noise performance
Table 4. Noise performance
Range Typical counts LSBrms
±10 V 10 1.52
±5 V 10 1.52
±2 V 11 1.67
±1 V 14 2.12
Table 4 summarizes the noise performance for the USB-1608FS-Plus. Noise distribution is determined by
gathering 50 K samples with inputs tied to ground at the user connector. Samples are gathered at the maximum
specified sampling rate of 100 kS/s.
Digital input/output
Table 5. Digital I/O specifications
Parameter Specification
Digital type 5V TTL
Number of I/O 8 (DIO0 through DIO7)
Configuration Independently configured for input or output
Pull-up/pull-down
configuration All pins pulled up to 5V via 47 K resistors (default).
May be changed to pull-down using an internal jumper.
Input high voltage
threshold 2.0 V min
Input high voltage limit 5.5 V absolute max
Input low voltage
threshold 0.8 V max
Input low voltage limit –0.5 V absolute min
0 V recommended min
Output high voltage 4.4 V min (IOH = –50 µA)
3.76 V min (IOH = –24 mA)
Output low voltage 0.1 V max (IOL = 50 µA)
0.44 V max (IOL = 24 mA)
Power on and reset state Input