DAS-20 from $1799
High Performance Analog and Digital Interface Board
for IBM Compatibles

• 100,000 Samples per Second A/D Conversion Rate
• 16 Single Ended or 8 Differential Analog Input Channels
• 12 Bit (1 part in 4096) Resolution
• Expandable to 128 Input Channels Using EXP-20
  Expansion Multiplexes
• 7 Software Selectable Input Ranges
• On Board 2 Kilobyte Channel/Gain
  Sequencing RAM Allows Complex Channel
  Scan Lists
• 2 Analog Output Channels with 200,000
  Conversion per Second Maximum Output
  Rate
• 16 Digital I/O Lines
• 2 Available Counter/Timer Channels
• Software Included

 The DAS-20 is a high performance analog a digital full-length I/O board designed for high data throughput, high accuracy and low noise. The DAS-20 can be operated in 16 channel single ended or 8 channel differential input modes (selected by on board switch). There are 7 software selectable input ranges available including both unipolar (0 to 10V) and bipolar  (+10V) configurations. The available gains range from 0.5X to 100X with input resolutions ranging from 4.88 mV down to 24.4 mV. By adding a single user installed resistor, the input range may be set to the exact requirements of the application. The A/D converter may be triggered 3 ways: by software command, by the on board counter/packer clock, or by an external pulse. Transfer of data may be performed by software/program control. PC interrupt or by direct memory access (DMA). Two channels of analog output are included, and D/A converters have 12 bit (1 part in 4096) resolution and are switch selectable for 0 to 10 V, +5V, or 10V output ranges. Included with the DAS-20 is an onboard five channel counter timer. Digital I/O on the DAS-20 consists of 16 TTL compatible lines, divided into one 8 bit output port and one 8 input port.

The DAS-20 comes complete with a utility software package. The utility software includes:

• A machine language driver that greatly simplifies programming the DAS-20. All DAS-20 functions can be accessed by these simple "call" functions. The drive is compatible with interpreted and complied BASIC programs. "C" FORTRAN, Pascal and Turbo-Pascal drivers are available.
• A wide variety of example and demonstration programs.
• Initial installation and setup routines.
• Calibration and test routines.
• Simple graphics and X-Y display programs.