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2-14
Functional Description
On DAS-1802HR boards, the maximum throughput for single-channel
operation is 100 ksamples/s. The maximum throughput for a
DAS-1802HR board, operating in bipolar mode and having less than 2
LSBs of error when driven from an ideal voltage source, is shown in Table
2-9.
The maximum throughput for a DAS-1802HR board, operating in
unipolar mode and having less than 2 LSBs of error when driven from an
ideal voltage source, is shown in Table 2-10.
The worst-case error limit is the sum of the front-end settling time and the
effect of converter non-linearity. In many measurement situations, this
error is tolerable. Note, however, that driving the inputs of channels to a
reasonable level of accuracy is often impractical because of the effects of
transducer output impedance and cable and interconnect impedance. For
best results, particularly with 16-bit systems, you should acquire all data
without changing the channel.
Table 2-9. Maximum Throughput for DAS-1802HR Boards
(Bipolar Mode - Change of Gain)
Maximum Throughput
To ±10.0V
To ±5.0V
To ±2.50V
To ±1.25V
From ±10.0V
98 ksamples/s
60 ksamples/s
60 ksamples/s
60 ksamples/s
From ±5.0V
60 ksamples/s
98 ksamples/s
60 ksamples/s
60 ksamples/s
From ±2.50V
60 ksamples/s
60 ksamples/s
98 ksamples/s
60 ksamples/s
From ±1.25V
60 ksamples/s
60 ksamples/s
60 ksamples/s
98 ksamples/s
Table 2-10. Maximum Throughput for DAS-1802HR Boards
(Unipolar Mode - Change of Gain)
Maximum Throughput
To 0 to 10.0V
To 0 to 5.0V
To 0 to 2.5V
To 0 to 1.25V
From 0 to 10.0V
98 ksamples/s
60 ksamples/s
60 ksamples/s
60 ksamples/s
From 0 to 5.0V
60 ksamples/s
98 ksamples/s
60 ksamples/s
60 ksamples/s
From 0 to 2.5V
60 ksamples/s
60 ksamples/s
98 ksamples/s
60 ksamples/s
From 0 to 1.25V
60 ksamples/s
60 ksamples/s
60 ksamples/s
98 ksamples/s
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