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| PCI-DAS4020/12 |
Ultra
High-Speed PCI-bus Compatible, 4-Channel, 12-Bit Analog Input Board with
Two Analog Output Channels & 24 Digital I/O Channels |
Price $2170.00 Plus GST
Features
- 20 MHz sample rate
- 12-bit A/D resolution
- 4 Analog Input Channels
- Software-selectable Input Ranges
- One A/D Converter per Channel
- Bus-Master & Scatter-Gather Capability
- Dual 12-bit D/A Converter
- Analog and Digital Triggering
- 24-bits of Digital I/O
- Fully Plug-and-Play
- Fully Autocalibrating
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General Description
The PCI-DAS4020/12 is an ultra high speed, analog input board
for PCI bus computers. It provides four, 12-bit analog inputs
with sample rates up to 20 MHz, 24 bits of digital I/O, and two,
12-bit analog outputs.
Central to the board is a powerful System Timing Controller (STC)
chip. The STC controls all A/D sampling including a 64-Ksample
A/D FIFO. This functionality is based on the STC use of an
on-board 32K x 24 SRAM. The board provides bus-mastering and
scatter-gather functionality to assure the desired system timing
is maintained.
The PCI-DAS4020/12 is completely plug-and-play. There are no
switches, jumpers, or potentiometers on the board. All board
addresses, interrupt channels etc. are set by your computer’s
plug-and-play software. Even calibration is performed via
software by using on-board digital potentiometers and trim D/A
converters.
Accuracy
Board error is a combination of Gain, Offset, Integral
Linearity, and Differential Linearity error. The overall
absolute worst-case error of the board can be calculated by
summing these component errors. Worst-case error occurs only in
the unlikely event that each of the component errors are at
their maximum level, and are causing error in the same
direction.
Each PCI-DAS4020/12 board is tested at the factory to make sure
that its actual worst case error is less than ±5.0 LSB. Allowing
for a 10% guard-band, the absolute worst-case error of a board
ship is ±5.5 LSB. Typical accuracy can be calculated from the
various component typical errors in a similar fashion. This
typical, maximum error calculation for the PCI-DAS4020/12 board
yields ±3.4 LSB. However, this again assumes that each of the
errors is forcing an error in the same direction. Empirical
evidence supports a conservative typical error budget of ±3.0
LSB.
Accuracy
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Absolute
Accuracy |
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±5.5 LSB
worst case error (either range) |
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Typical
Accuracy |
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±3.0 LSB
error (either range) |
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Accuracy Components
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Gain Error |
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±2.0 LSB
max, ±1.0 LSB typ |
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Offset
Error |
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±1.5 LSB
max, ±1.0 LSB typ |
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Integral
Linearity error |
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±2.5 LSB
max, ±1.0 LSB typ |
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Differential Linearity error |
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±1.0 LSB
max , ±0.4 LSB typ (No missing codes guaranteed) |
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Interested in this Product? Contact
roger@firetaildaq.com.au
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