CyberResearch UMDAS 0802DA - Manual (Page 30)

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 Specifications