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> Analog/Digital I/O Cards
D/A-06A
Six Channel Analog Output Card
FEATURES
FUNCTIONAL
DESCRIPTION
Model
D/A-06A can be installed in I/O slots of PC/ XT/AT class computers.
It economically provides six independent 12-bit Digital-to-Analog
Converters (DAC) and 24 digital input/output channels. Each
DAC has double-buffered input for single step update and occupies
a unique address location. Analog Output Update Mode is selected
by a selector switch on this card. Three update modes are
available:
- Individual
update of each channel.
- Simultaneous
update of all selected channels.
- Simultaneous
update of all selected channels upon receipt of an external
signal.
(Note:
This mode requires use of six digital I/O lines on Port C.)
Digital
I/O channels are provided from a type 8255 Programmable Peripheral
Interface (PPI). The PPI has 24 I/O bits which may be programmed
in three modes of operation:
- Mode
0: Each group of 8 I/O bits may be setup to be input or
output.
- Mode
1: Each group may be setup to have eight lines of input
or output. (Note: in this mode, three lines are
used for handshaking and interrupt-control signals.)
- Mode
2: Eight lines are used for bidirectional bus and five
lines are used for handshaking.
Base
address selection is via on-card DIP switches and the D/A-06A
requires 16 consecutive I/O address locations. The base address
can be selected anywhere within the I/O address range of 000-3FF
(hex) providing that the address locations do not overlap
other functions. Data are written to the DAC's in right-justified
2-byte binary format (8 LSB's and 4 MSB's). For example:
Unipolar
Ranges:
0000 0000 0000 = Zero
1000 0000 0000 = ½ Scale
1111 1111 1111 = Full Scale
Bipolar
Ranges:
0000 0000 0000 = Neg. Full Scale
1000 0000 0000 = Zero
1111 1111 1111 = Pos.FullScale
SPECIFICATIONS
Analog
Outputs
- Resolution:
12 bits (0 to 4095 decimal)
- Channels:
Six
- Voltage
Output Ranges at 5mA max.:
0.0 to 5.0 VDC, 0.0 to 10.0 VDC, ±2.5 VDC, ±5.0
VDC, ±10.0 VDC
- Current
Output Ranges with excitation voltage (8 - 36) VDC:
1 to 5 mA, 4 to 20 mA, 0 to 50 mA *
*: Addition of one 167 ohm resistor per channel is required.
Digital
to Analog Converter
- AD-7548
monolithic chip, double buffered, right justified.
- Relative
Accuracy: ± 1 LSB (includes nonlinearity)
- Monotonicity:
Guaranteed over operating temperature range
- Settling
time: 4 usec to 0.01% for full scale step input
- Offset
Temperature Drift:
± 1 ppm/°C typ., ± 3 ppm/°C
max.
- Gain
Temperature Drift:
± 1 ppm/°C typ., ± 5 ppm/°C
max.
- Data
Format: Right-justified, two bytes (8LSB's and 4MSB's)
Digital
I/O
- 24
programmable digital input/output lines. (Ports A, B,
C lo, and C hi).
- 8255
PPI Controller. All modes supported.
- Inputs
TTL, DTL, CMOS compatible:
Logic Low: -0.5V to +0.8V., Logic High: +2.0V to +5.0V.
- Load
Current: 10 uA.
- Outputs
TTL, DTL, CMOS compatible:
Logic Low: 0.45V max. at 1.7mA sink current.
Logic High: 2.4V min. at -200uA source current., 1.5V
min. at -1mA source current (Darlington drive not available
from Port A).
Environmental
- Operating
Temperature: 0 to +60 °C.
- Storage
Temperature: -20 to +85 °C.
- Humidity:
5% to 95% non condensing.
- Size:
13.375 inches. Install in a full-size slot.
Power
Requirements
- +5
VDC at 500mA max.
- +12
VDC at 70mA max.
- -12
VDC at 60mA max.
Regulatory
Compliance 
Declaration of Conformity, and Test Reports are on file. Users
must use appropriate shielded cables.
| Part
Number |
Price(USD)
|
| D/A-06A |
460.00
|
View / Download Manual (in .PDF
format)
|
