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

USB-1208FS User's Guide
Range Typical Counts
±10 V 2

Analog output

Parameter
Resolution
Output range
Number of channels
Throughput (Note 4)
Power on and reset voltage
Output drive
Slew rate
Note 4: Maximum throughput scanning to PC memory is machine dependent. The rates specified are for
Windows XP only. Maximum rates on operating systems that predate XP may be less and must
be determined through testing on your machine.
Range
0-4.096 V
Range % of FSR
0-4.096 V 0.1 typ, 0.9 max
Negative offsets will result in a fixed zero-scale error or ―dead band.‖ At the maximum offset of -
Note 5:
9 mV, any input code of less than 0x009 will not produce a response in the output.

Digital input/output

Digital type
Number of I/O
Configuration
Pull up/pull-down configuration
Input high voltage
Input low voltage
Output high voltage
(IOH = -2.5 mA)
Output low voltage
(IOL = 2.5 mA)
Power on and reset state
Table 7. Noise performance, single-ended mode
LSB
rms
0.30
Table 8. Analog output specifications
Conditions
Software paced
Single channel, continuous scan
Dual channel, continuous scan,
simultaneous update
Each D/A OUT
Table 9. Analog output accuracy, all values are (±)
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
CMOS
16 (Port A0 through A7, Port B0 through B7)
2 banks of 8
All pins pulled up to Vs via 47K resistors (default). Positions available for pull
down to ground. Hardware selectable via zero ohm (Ω) resistors as a factory
option.
2.0 V min, 5.5 V absolute max
0.8 V max, –0.5 V absolute min
3.8 V min
0.7 V max
Input
Specification
12-bits, 1 in 4096
0 – 4.096 V, 1 mV per LSB.
2
250 S/s single channel typical, PC dependent
10 kS/s
5 kS/s
Initializes to 000h code
15 mA
0.8V/microsecond (µs) typ
Offset (mV)
(Note 5)
1.0 typ, 9.0 max
27
Specifications
Accuracy at FS
(mV)
4.0 typ, 45.0 max