Measurement Computing USB-231 - Manual (Page 23)

USB-231 User's Guide Specifications
23
Analog output
Table 3. Analog output specifications
Parameter Condition Specification
Resolution 16 bits, 1 in 65,536
Output range ±10 V
Number of channels 2
Update rate Hardware paced 5 kS/s simultaneous per channel max, hardware-paced
Trigger sources Software, TRIG
Output current drive ±5 mA
Short circuit current ±11 mA
Slew rate 3 V/µs
Output impedance
0.2 Ω
Absolute accuracy (no load)
Typical at full scale 8.6 mV
Maximum over temperature,
full scale
32 mV
INL ±4 LSB
DNL 16 bits no missing codes
Power-on state 0 V
Startup glitch –7 V for 10 µs
Timebase
The following specifications apply to hardware-paced analog input and analog output sampling accuracy.
Parameter Specification
Timebase frequency 80 MHz
Timebase accuracy ±100 ppm
Timing resolution 12.5 ns
Digital input/output
Table 4. Digital I/O specifications
Parameter Specification
Compatibility LVTTL, 3.3 V LVCMOS
Number of channels 8 (DIO0 through DIO7)
Configuration Each bit can be configured as input (power on default) or output
Pull-down resistor 47.5 k
Ω to digital ground (GND).
Absolute maximum voltage
range –0.3 V to 5 V with respect to digital ground (GND)