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OM-USB-1208HS Series User's Guide
Analog output (OM-USB-1208HS-2AO, OM-USB-1208HS-4AO)
Parameter
D/A converter
Number of channels
Resolution
Output range
Output transient
D/A update rate
Sample clock source
Monotonicity
Output current
Output short-circuit
protection
Output coupling
Power up and reset state
Output noise
Settling time (to 0.05%)
Absolute accuracy
Slew rate
Offset error drift
Gain error drift
Digital input/output
Parameter
Digital type
Number of I/O
Configuration
Pull-up configuration
Digital I/O transfer rate
(system-paced)
Input high voltage
Input low voltage
Output high voltage
Output low voltage
Output current
Table 5. Analog output specifications
Condition
Calibrated
Uncalibrated
Host PC is reset, powered on, suspended, or
a reset command is issued to device.
Software paced
Hardware paced
Output connect to GND
=5 kΩ, C
20 V output step, (R
L
Table 6. Digital I/O specifications
Specification
CMOS
16
Each bit may be configured as input (power on default) or output
The port has 47 kΩ resistors configurable as pull-up or pull-down with an internal
jumper. The default setting is pull-down.
33 to 8000 port reads/writes or single bit reads/writes per second typ, system dependent.
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 = –50 µA)
3.76 V min (IOH = –24 mA)
0.1 V max (IOL = 50 µA)
0.44 V max (IOL = 24 mA)
±24 mA max per terminal (see "Power"section for additional information)
18
Specification
Texas Instruments DAC7553
OM-USB-1208HS-2AO:
OM-USB-1208HS-4AO:
12 bits
±10 V
±10.2 V
Duration: 3 ms typ
Amplitude: 6 V p-p typ
33 to 5000 S/s typ, system dependent
1 MHz max (per channel)
Internal D/A clock or AOCKI
12 bits
±3 mA max per channel
Unlimited duration (10 mA typ)
DC
0 V
0.53 mV rms
=200 pf)
5 µS max
L
±0.1%
6.7 V/µs typ
10 ppm/°C typ
65 ppm/°C typ
Specifications
2 independent
4 independent
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