Analog Output; Digital Input/Output - Measurement Computing USB-1208FS-Plus User Manual

USB-1208FS-Plus User's Guide

Analog output

Parameter
Resolution
Output range
Number of channels
Throughput (Note 4)
Power on and reset voltage
Output drive
Slew rate
Maximum throughput when scanning is machine dependent.
Note 4:
Table 9. Analog output accuracy, all values are (±); accuracy tested at no load
Range
0 V to 5.0 V
Range % of FSR
0 V to 5.0 V 0.1 typ, 0.9 max
Zero-scale offsets may result in a fixed zero-scale error producing a "dead-band" digital input code
Note 5:
region. In this case, changes in digital input code at values less than 0x040 may not produce a
corresponding change in the output voltage. The offset error is tested and specified at code 0x040.

Digital input/output

Parameter
Digital type
Number of I/O
Configuration
Pull up/pull-down configuration
Input high voltage threshold
Input high voltage limit
Input low voltage threshold
Input low voltage limit
Output high voltage, Port A
Output low voltage, Port A
Output high voltage, Port B
Output low voltage, Port B
Power on and reset state
Table 8. Analog output specifications
Condition
Software paced
Hardware paced
Each D/A OUT
Accuracy (LSB)
4.0 typ, 45.0 max
Table 10. Analog output accuracy components, all values are (±)
Gain Error at FS (mV)
4.0 typ, 36.0 max
Table 11. Digital I/O specifications
Specification
CMOS
16 (Port A0 through A7, Port B0 through B7)
2 banks of 8. Port B is high current drive.
All pins pulled up to 5V via 47 kΩ resistors (default). Change to pull-down using
internal user-configurable jumpers.
2.0 V min
5.5 V absolute max
0.8 V max
–0.5 V absolute min
0 V recommended min
4.4 V min (IOH = –20 µA)
3.84 V min (IOH = –6.0 mA)
0.1 V max (IOL = 20 µA)
0.33 V max (IOL = 6.0 mA)
4.4 V min (IOH = –50 µA)
3.76 V min (IOH = –24.0 mA)
0.1 V max (IOH = 50 µA)
0.44 V max (IOH = 24.0 mA)
Input
Specification
12-bits, 1 in 4,096
0 V to 5.0 V
2
250 S/s single channel typ, PC dependent
50 kS/s max per channel
Initializes to 000h code
5 mA, sourcing
0.8 V/ µs typ
Offset (mV)
(Note 5)
1.0 typ, 9.0 max
23
Specifications
Accuracy at FS (mV)
4.0 typ, 45.0 max