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D/A12-08/16
Eight and Sixteen Channel 12-Bit Analog Output Cards

FEATURES

• Eight or Sixteen independent double-buffered analog outputs
• 12-Bit resolution
• Six Voltage Output Ranges: 0-2.5V, 0-5V, 0-10V, ±2.5V, ±5V, ±10V
• Individual range selection per channel
• Channel-by-channel or simultaneous update modes
• Outputs held at zero volts at power-up
• Setup and calibration software included

 

FUNCTIONAL DESCRIPTION

Models D/A12-08 and D/A12-16 are full-size cards that can be installed in any long I/O slot of PC-AT class computers. The cards provide eight and sixteen 12-bit- resolution analog outputs respectively at a 37-pin male Sub-D connector. Analog output channels can be individually switch configured for any of the following voltage ranges:

• 0 to +2.5V
• 0 to +5V
• 0 to +10V
• ±2.5V
• ±5V
• ±10V

Type AD7237 double-buffered dual DAC chips are used. Data are transferred from the computer into outer registers a byte at a time and transferred into inner registers a word at a time. The analog outputs can be updated either independently or simultaneously. In order to prevent inadvertent outputs at system power-on, the reference voltage to all DAC's is set to zero volts. Then, after all DAC's have been loaded with the desired initial values, a software command can be used to switch this reference voltage to its nominal value. Similarly, a software command can be used at any time to set the reference voltage to zero causing all DAC outputs to be zero volts.

SPECIFICATIONS

Analog Outputs

• Resolution: 12 bits (0 to 4095 decimal)
• Channels: Eight or Sixteen, Independent
• Voltage Output Ranges at 5mA max.:
  0-2.5 VDC, 0-5 VDC, 0-10 VDC, ± 2.5 VDC, ± 5.0 VDC, ± 10.0 VDC
• Short-circuit current: 25 mA maximum
• Output resistance: Less than 0.1 ohm

Digital to Analog Converter

• AD7237 monolithic chip, double buffered
• Relative Accuracy: ± ½ LSB
• Linearity: ± ½ LSB integral non-linearity over rated temperature range
• Monotonicity: Guaranteed over operating temperature range
• Settling time: 8 usec to 1 LSB for full scale step input
• Offset Temperature Drift:
  ± 1 ppm/°C typ., ± 3 ppm/°C max.
• Gain Temperature Drift:
  ± 15 ppm/°C typ.
• Data Format: Right-justified, two bytes (8LSB's and 4MSB's)

Environmental

• Operating Temperature: 0 to +60 degree C.
• Storage Temperature: -20 to +85 degree C.
• Humidity: 5% to 95% non condensing.
• Size: 13.130 inches. Install in a full-size slot.

Power Requirements

• +5 VDC at 250 mA max.
• +12 VDC at 310 mA max.
• -12 VDC at 150 mA max.

Regulatory Compliance

Declaration of Conformity, and Test Reports are on file. Users must use appropriate shielded cables.

Part Number	Price(USD)
D/A12-08	470.00
D/A12-16	850.00

View / Download Manual (in .PDF format)