Measurement Computing USB-201-OEM - Manual (Page 14)

USB-201-OEM User's Guide Specifications
14
Noise performance
For the peak to peak noise distribution test, the input channel is connected to AGND at the input terminal block,
and 12,000 samples are acquired at the maximum throughput.
Table 3. Noise performance specifications
Range Counts LSBrms
±10 V 5 0.76
Analog input calibration
Table 4. Analog input calibration specifications
Parameter Specification
Recommended warm-up time 15 minutes min
Calibration method Factory
Calibration interval 1 year
Digital input/output
Table 5. Digital input specifications
Parameter Specification
Digital type TTL
Number of I/O 8
Configuration Each bit may be configured as input (power on default) or output
Pull-up configuration The port has 47
kΩ resistors that may be configured as pull-up or pull-down with an
internal jumper. The factory configuration is pull-down.
Digital I/O transfer rate
(system-paced) 33 to 4000 port reads/writes per second typical, system dependent
Input low voltage threshold 0.8 V max
Input high voltage threshold 2.0 V min
Input voltage limits 5.5 V absolute max
–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)
Output current ±24 mA max