Data Acquisition (DAQ) and Control from Microstar Laboratories

thumbnail DAP 3000a


The DAP 3000a is now Obsolete. For higher performance at a lower cost, upgrade your system for one of the PCI-bus DAP boards: the DAP 4000a.

If you need spare parts for a DAP 3000a system, compatible items are available.

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The DAP 3000a is an excellent choice for applications where there is a need for a moderate amount of real-time processing of data in the time interval between samples, and for applications requiring fast sample rates.

The DAP 3000a/212 features a clock-doubled processor that executes two internal clock cycles for each external clock cycle. The 486 processor also features a hardware multiplier, making it well-suited for DSP operations. The processor used on the DAP 3000a/212 has a larger cache than that used on the DAP 3000a/111 which further improves the performance of the DAP 3000a/212.

The DAP 3000a models:

  • have a 486 processor onboard.
  • come with 512K or 2M of DRAM onboard memory.
  • are compatible with other a-Series boards.
  • work with the AT ISA bus for 286/386/486/Pentium PC platforms.
  • transfer data to the PC at high rates up to 833K samples per second.
  • allow fast real-time processing.
  • offer low latency--0.2 ms task time quantum--for fast response.
  • have a sampling period resolution of 100 ns.
  • provide onboard DSP routines.
  • sample or update digital I/O at up to 1.66 million values per second.
  • sample analog inputs at up to 769K samples per second.
  • update analog outputs at up to 833K samples per second.
  • have expandable analog and digital inputs/outputs.
  • comply with the EMC Directive 89/336/EEC

The 486 processor gives the DAP3000a low latency -- down to a 0.2 ms task time quantum. This means that when low latency mode is enabled, a single task will run for no more than 0.2 ms before DAPL switches to another task. This is crucial for process control applications where data must be responded to as quickly as possible.

DAP 3000a Specifications

General Specifications
Dimensions : 13.33 inches x 4.8 inches
Weight : 10.2 oz
Power requirements : +5V, 2.0 Amps 
Operating temperature : 0-50 degrees Celsius 
Accuracy of crystal clocks : 50 parts per million
Type of A/D converter : Successive Approximation

Input                             /111         /212
Analog Inputs                       16           16
Expandable to                      512          512
Voltage Ranges              
 -0 to +5 volts                      x            x
 -2.5 to +2.5 volts                  x            x
 -5 to +5 volts                      x            x
 -10 to +10 volts                    x            x
Samples(x 1000) per second*        400          769
Time increment (nanoseconds)       100          100
Maximum Gain**                     500          500
ADC Resolution (bits)               12           12
Digital Inputs (synchronous)        16           16
Expandable to                      128          128
Samples (x 1000) per second        400         1600

Output                            /111         /212
Analog Outputs                       2            2
Expandable to:                      66           66
Voltage Ranges                
 -0 to +5 volts                      x            x
 -2.5 to +2.5 volts                  x            x
 -5 to +5 volts                      x            x
 -10 to +10 volts                    x            x
Updates (x1000) per second
  per onboard channel              400          833
DAC Resolution (bits)               12           12
Digital Outputs                     16           16
Expandable to:                    1024         1024
Updates (x1000) per second         400         1666

Microprocessor                    /111         /212
486                              SLC/E        SXLC2
Clock Speed(MHz)                    24           48
Onboard Operating System     DAPL 2000    DAPL 2000
RAM (Kbytes)                       512         2048

PC Interface                      /111         /212
Dual 1024-byte high-speed FIFO       x            x
Buffers                              2            2
Samples (x1000) transferred 
    per second***                  400          769

DSP                               /111         /212
Onboard DSP emulation                x            x 

*    Crystal-controlled, 
     with 12-bit A/D resolution
**   Top sampling speeds are available 
     only with gain=1.  All models also have 
     gains of 10, 100, and 500.
***  Benchmarked rates vary with PC platform.
Obtain additional information from Technical Note 105: Technical Product Information for the DAP 3000a (45K PDF file).

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