Analog output
Table 4-6. Analog output specifications
Parameter Conditions
Specification
Resolution
12-bits, 1 in 4096
Output range
0 to 4.096 V, 1 mV per LSB.
Number of channels
2
Software paced
250 S/s single channel typical, PC dependent
Single channel, continuous scan
10 kS/s
Throughput (Note 5)
Dual channel, continuous scan,
simultaneous update
5 kS/s
Power on and reset voltage
0V, ±20 mV typ. (initializes to 000h code)
Output drive
Each D/A OUT
±15 mA
Slew rate
0.8 V/microsecond (µs) typ
Note 5:
Maximum throughput scanning from 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.
Table 4-7. Analog output accuracy
Range
Accuracy
(±LSB)
0 to 4.096 V
4.0 typ, 45.0 max
Table 4-8. Analog output accuracy components
Range
% of FSR (±)
Gain Error at FS (±mV) Offset (±mV)
(Note 6)
Accuracy at FS (±mV)
0 to 4.096 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 6:
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
UMDAS 0802DA
offset error is tested and
specified at code 0x040.
Digital input/output
Table 4-9. Digital I/O specifications
Digital type
CMOS
Number of I/O
16 (Port A0 through A7, Port B0 through B7)
Configuration
2 banks of 8
Pull-up/pull-down
configuration
All pins pulled up to Vs via 47 K resistors (default). Positions available for pull-down
to ground. Hardware selectable via zero ohm (
Ω
) resistors as a factory option.
Input high voltage
2.0 V min, 5.5 V absolute max
Input low voltage
0.8 V max, –0.5 V absolute min
Output high voltage
(IOH = –2.5 mA)
3.8 V min
Output low voltage
(IOL = 2.5 mA)
0.7 V max
Power on and reset state
Input
4-3
U
MDAS 0802DA
User's Guide
S
pecifications
