Measurement Computing USB-1208FS-Plus - Manual (Page 23)

USB-1208FS-Plus User's Guide Specifications
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Analog output
Table 8. Analog output specifications
Parameter Condition Specification
Resolution 12-bits, 1 in 4,096
Output range 0 V to 5.0 V
Number of channels 2
Throughput (Note 4) Software paced 250 S/s single channel typ, PC dependent
Hardware paced 50 kS/s max per channel
Power on and reset voltage Initializes to 000h code
Output drive Each D/A OUT 5 mA, sourcing
Slew rate 0.8 V/ µs typ
Note 4: Maximum throughput when scanning is machine dependent.
Table 9. Analog output accuracy, all values are (±); accuracy tested at no load
Range Accuracy (LSB)
0 V to 5.0 V 4.0 typ, 45.0 max
Table 10. Analog output accuracy components, all values are (±)
Range % of FSR Gain Error at FS (mV) Offset (mV)
(Note 5)
Accuracy at FS (mV)
0 V to 5.0 V 0.1 typ, 0.9 max 4.0 typ, 36.0 max 1.0 typ, 9.0 max 4.0 typ, 45.0 max
Note 5: Zero-scale offsets may result in a fixed zero-scale error producing a "dead-band” digital input code
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
Table 11. Digital I/O specifications
Parameter Specification
Digital type CMOS
Number of I/O 16 (Port A0 through A7, Port B0 through B7)
Configuration 2 banks of 8. Port B is high current drive.
Pull up/pull-down configuration All pins pulled up to 5V via 47 kΩ resistors (default). Change to pull-down using
internal user-configurable jumpers.
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, Port A 4.4 V min (IOH = –20 µA)
3.84 V min (IOH = –6.0 mA)
Output low voltage, Port A 0.1 V max (IOL = 20 µA)
0.33 V max (IOL = 6.0 mA)
Output high voltage, Port B 4.4 V min (IOH = –50 µA)
3.76 V min (IOH = –24.0 mA)
Output low voltage, Port B 0.1 V max (IOH = 50 µA)
0.44 V max (IOH = 24.0 mA)
Power on and reset state Input