ICS PCI-AOB2 Series, User Manual

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1-2 PCI-AOB2/4/6 Series User’s Guide
percent causing all DAC outputs to be equal to 15 percent of each DACs programmed
value. For more information, see Chapter 5, Programming.
Each digital I/O line is buffered by a type 74LS245 tristate buffer transceiver capable of
sourcing 15 mA or sinking 24mA (64 mA on request as a factory installed option).
Pull-ups on the card assure that there are no erroneous outputs at power up until the card is
initialized by system software.
Specifications
Analog Outputs
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Resolution: 12 Binary bits (0 to 4095 decimal).
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Channels: 2, 4, or 6 Voltage output or Current sink channels.
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Current Range (with excitation voltage 8-36 VDC):4 to 20 mA.
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Voltage ranges (5mA max):
0V to +2.5V.
0V to +5V.
0V to +10V.
-2.5V to +2.5V.
-5V to +5V.
-10V to +10V.
AD7237 D/A Converter, Double Buffered /
Simultaneous Update
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Relative Accuracy: ± ½ LSB.
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Monotonicity: 12 bits over operating temperature range.
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Settling Time: 8 usec to one LSB for full-scale step input.
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Linearity ± ½ LSB integral non-linearity over rated temperature range.
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Gain Stability: 15 ppm/ °C.
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Output Drive Capability: 5mA maximum.
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Short-Circuit Current: 25 mA maximum.
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Output Resistance: Less than 0.1
Ω
.
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Data Format: 12-bit binary, right justified, and offset binary for bipolar outputs.