Features
- Up to 16 Analog Output Channels
- Optional 32-Bit Digital Output
- 50K Samples/Second, Maximum Channel Update Rate
- Programmable Analog Output Ranges
- 12-Bit DAC Resolution
- Windows 2000, XP, & 2003 Operating Systems
Introduction
The USB Digital-to-Analog Converter (DAC) Data Brick (UDB) is a breakthrough in programmable analog output devices used with commercial bus architectures. The UDB solves the critical data through-put problem of real-time processing systems in which PCI-based analog output modules are rate-constrained by operating system software such as Windows.
Most PCI modules that need to maintain accurate data-driven, real-time coherency for derived, EU, and raw parameters are limited in two ways: 1) they must use single transfers over the PCI bus, and 2) they are limited to the maximum rate handled by operating system timers (approximately 1 kHz for Windows).
Receiving both data and time tags over the USB bus from OMEGA for Windows software, the UDB features independent, on-board timers to accurately correlate analog and discrete outputs at their correct real-time rate. The UDB supports raw, EU, derived, and user-defined parameters in a data-driven manner.
As with all of our boards, the USB devices in our Series-3000 systems use plug-n-play technology. Occupying only a small 3.5-inch by 9-inch footprint, the DAC Data Brick can be coupled with any of our flight-line, quick-look processing, instrumentation set-up, and ground station processing software products to provide a best-value solution for system engineers and integrators.
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Input Signals |
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Input Data |
USB data, 16-bit words |
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DAC Input Data Word Format |
12 bits data + 4 bits channel address
Bipolar: 4095 = full scale +, 2048 = 0V, 0 = full scale – |
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DAC Input Data Rate |
1K – 25K samples/second/channel; data driven tracking |
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Number of DAC Channels |
16 channels standard |
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Discrete Data |
16-bit register |
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Discrete Output Data Format |
16 bits TTL |
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Discrete Data Rate |
25K samples/second/channel maximum |
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Sinewave Reference Clock Input |
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Frequency |
1 kHz, 10 kHz, 100 kHz, 1 MHz – 50 MHz |
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Signal Type |
Single-ended sine wave |
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Levels |
1V – 8V peak-to-peak |
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DC Offset |
DC Offset < 10 percent of volts peak-to-peak level centered around ground |
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Input Impedance |
50 ohms, 75 ohms, 10K ohms (programmable) |
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SNR |
≥ 50 dB |
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RS-422/TTL Reference Clock Input |
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Frequency |
1 kHz, 10 kHz, 100 kHz, 1 MHz – 50 MHz |
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Signal Type |
RS-422, TTL, LVTTL (3.3V) |
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Performance |
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Number of DAC Channels |
16 |
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DAC Resolution |
12 bits |
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DAC Rate |
25,000 samples/second(maximum)/channel |
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DAC Output Voltage Range |
+5V to - 5V |
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DAC Relative Accuracy |
± 2 LSB – (typical) + gain error + bipolar output accuracy |
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DAC Linearity |
± 0.005 percent of FSR (maximum) |
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DAC Gain Error |
+/- 0.3 percent (typical) |
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DAC Bipolar Output Accuracy |
± .8 percent of FSR |
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DAC Bipolar Offset Error |
± .2 percent of FSR |
Output |
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DAC Output Current |
Maximum 0.5 mA/channel – 10 Kohm load |
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Discrete Output Current |
Synchronous buffer 1 mA/channel |
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Data Latency |
50 ms < BOARD_LATENCY < 200 ms (with software suport)
+/-15 percent of BOARD_LATENCY data rate tracking |
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Electrical and Environmental |
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Power |
Battery |
Rechargeable COTS battery, external charger provided with battery-powered configuration
2-hour operating life typical |
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DC |
Accepts 10 VDC to 35 VDC input |
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AC |
Accepts 110 VAC, supported with external AC/DC unit |
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Consumption |
5W typical |
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Status |
LED |
Before Operation – Flashes to indicate Board ID#
During Operation – Red LED indicates no data or underflow Yellow LED indicates data flowing, but frame sync not found Green indicates properly formatted data is flowing |
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Physical |
Connectors |
Dual 26-pin high density D-type connector on card edge for analog and discrete output |
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Power Switch |
Remote on/off or auto-on with USB connector |
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Housing |
<!--[if !vml]-->Aluminum, black; conductive cooling; mounting holes
3.5” (W) by 9” (L) by 2.9” (H) (maximum height with battery and feet)
3.5” (W) by 9” (L) by 1.5” (H) (no battery or feet) |
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Environment |
Operating Temperature |
Operation from 0 °C to 50 °C |
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Operating Humidity |
20 to 95 percent noncondensing |
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Storage Temperature |
-40° to 80 °C (storage) |
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Storage Humidity |
20 to 95 percent noncondensing |
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Accessories |
Documentation |
User manual, installation and program information |
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Ordering Codes |
UDB-2X1-X1
UDB-X2X-XX
UDB-CAS-C01
UDB-CAS-C02
UDB-CAS-T01 |
DAC Data Brick, 16 Channels
D-Type Connector, Standard Density
Case w/Strap & Handle (holds Brick, Laptop & Accessories)
Case w/Handle (holds Brick & Accessories)
Case w/Handle & Wheels (holds 3 Bricks, Laptop & Accessories) |