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Six Channel Analog Output Card


  • Six independent analog outputs
  • 12-Bit resolution
  • Voltage Output Ranges: 0-5V, 0-10V, ±2.5V, ±5V, ±10V
  • Current Output Ranges: 0-20mA, 4-20mA, (0-50mA and 10-50mA optional).
  • Individual range selection per channel
  • Three update modes including simultaneous update
  • Additional 24-bit parallel digital input/output port
  • Setup and calibration software included
Model D/A-06A can be installed in I/O slots of PC/ XT/AT class computers. It economically provides six independent 12-bit Digital-to-Analog Converters (DAC) and 24 digital input/output channels. Each DAC has double-buffered input for single step update and occupies a unique address location. Analog Output Update Mode is selected by a selector switch on this card. Three update modes are available:
  • Individual update of each channel.
  • Simultaneous update of all selected channels.
  • Simultaneous update of all selected channels upon receipt of an external signal.
(Note: This mode requires use of six digital I/O lines on Port C.)

Digital I/O channels are provided from a type 8255 Programmable Peripheral Interface (PPI). The PPI has 24 I/O bits which may be programmed in three modes of operation:

  • Mode 0: Each group of 8 I/O bits may be setup to be input or output.
  • Mode 1: Each group may be setup to have eight lines of input or output. (Note: in this mode, three lines are used for handshaking and interrupt-control signals.)
  • Mode 2: Eight lines are used for bidirectional bus and five lines are used for handshaking.
Base address selection is via on-card DIP switches and the D/A-06A requires 16 consecutive I/O address locations. The base address can be selected anywhere within the I/O address range of 000-3FF (hex) providing that the address locations do not overlap other functions. Data are written to the DAC's in right-justified 2-byte binary format (8 LSB's and 4 MSB's). For example:

Unipolar Ranges:

0000 0000 0000 = Zero
1000 0000 0000 = ½ Scale
1111 1111 1111 = Full Scale

Bipolar Ranges:

0000 0000 0000 = Neg. Full Scale
1000 0000 0000 = Zero
1111 1111 1111 = Pos.FullScale


Analog Outputs

  • Resolution: 12 bits (0 to 4095 decimal)
  • Channels: Six
  • Voltage Output Ranges at 5mA max.:
    0.0 to 5.0 VDC, 0.0 to 10.0 VDC, ±2.5 VDC, ±5.0 VDC, ±10.0 VDC
  • Current Output Ranges with excitation voltage (8 - 36) VDC:
    1 to 5 mA, 4 to 20 mA, 0 to 50 mA *
    *: Addition of one 167 ohm resistor per channel is required.

Digital to Analog Converter

  • AD-7548 monolithic chip, double buffered, right justified.
  • Relative Accuracy: ± 1 LSB (includes nonlinearity)
  • Monotonicity: Guaranteed over operating temperature range
  • Settling time: 4 usec to 0.01% for full scale step input
  • Offset Temperature Drift:
    ± 1 ppm/°C typ., ± 3 ppm/°C max.
  • Gain Temperature Drift:
    ± 1 ppm/°C typ., ± 5 ppm/°C max.
  • Data Format: Right-justified, two bytes (8LSB's and 4MSB's)

Digital I/O

  • 24 programmable digital input/output lines. (Ports A, B, C lo, and C hi).
  • 8255 PPI Controller. All modes supported.
  • Inputs TTL, DTL, CMOS compatible:
    Logic Low: -0.5V to 0.8V., Logic High: 2.0V to 5.0V.
  • Load Current: 10 uA.
  • Outputs TTL, DTL, CMOS compatible:
    Logic Low: 0.45V max. at 1.7mA sink current.
    Logic High: 2.4V min. at -200uA source current., 1.5V min. at -1mA source current (Darlington drive not available from Port A).


  • Operating Temperature: 0 to 60 °C.
  • Storage Temperature: -20 to 85 °C.
  • Humidity: 5% to 95% non condensing.
  • Size: 13.375 inches. Install in a full-size slot.

Power Requirements

  • 5 VDC at 500mA max.
  • 12 VDC at 70mA max.
  • -12 VDC at 60mA max.

Regulatory Compliance

  • This product is in full compliance with CE requirements.

Part Number Price(USD)
View / Download Manual (in .pdf format)
Acquisition Control Communications Engineering / Systems
USA Office

Address: 1480 Gulf Road, Suite 837,
PO Box 1280
Point Roberts, WA 98281

Western Canada - Vancouver BC

Tel:1.800.663.6001 or 1.604.925.6150
Address: 2454 Haywood Ave
West Vancouver, BC V7V 1Y1

Eastern Canada - Markham, Ontario

Tel:1.800.465.0164 or 1.905.513.7027