High Speed Data Acquisition Card

Advanced Microcomputer Systems (AMS) manufactures various types of Microprocessor Trainers, In-Circuit Emulators, EPROM Programmers and PC Add-on cards which can be used for various purposes like Development, Instrumentation etc., One such instrumentation card is AMS High Speed Data Acquisition Card (AMS DAS). AMS DAS card is a high performance hardware which upgrades PC system to a high – speed data acquisition and process control system. An Application Programmer Interface (API) is provided to make the task of writing a customized user application program easy and fast.

Main Features 

  • One 16 channel 12 bit ADC (10µs) (16 single ended or 8 differential inputs).
  • 3 programmable timers.
  • Two 12 bit DACs.
  • 24 programmable digital I/O lines (TTL compatible), with Relay drivers, Opto isolation and Interrupt facility.
  • 8 externally latched / strobed input lines.
  • Software programmable I/O Address, Channel, Mode, gain, Trigger selection.

Features 

ADC: 12-bit Analog to digital converter (AD 1674 based) with the following specifications:
  • Conversion time of 10 us.
  • 16 single ended or 8 differential analog inputs.
  • Unipolar or Bipolar operation: 0 to +10V, +5V, +10V.
  • Up to 100K samples per sec.
  • Four different modes of channel selection:
  • Auto increment (Auto increment of all channels).
  • Two channels (Toggles between first and second channel).
  • Single channel.
  • Polled channel.
  • Four different modes of triggering the conversion:
  • a) Polled mode (conversion triggered manually).
  • b) External triggered mode (conversion triggered by an external signal).
  • c) Timer triggered mode (8254 timer generated trigger).
  • d) Auto triggered mode (conversion triggered by the end of conversion signal of the previous ADC cycle).
  • Data conversion can be stopped after specific number of conversions.
  • Three different modes of acquiring data from ADC:
  • Polled Mode.
  • Interrupt mode.
  • DMA Mode.
  • Software programmability for:
  • I/O Address selection.
  • Channel selection.
  • Mode selection
  • Gain selection (gain of 1,2,5,10) ( Bipolar / Unipolar, Single Differential/ ended ).
  • Trigger selection (External, Auto, Timer, and Polled).
  • Multiplexers are fault /over voltage protected.

DAC

  • Two 12 bit Digital to Analog (DAC) converters (AD7541).
  • Settling time of 500 ns.
  • Unipolar or bipolar output: 0 to +10V, +10V.
  • Data can be loaded at programmed interval.
  • DMA facility for both the DACs available.

DIO

  • 24 lines programmable Digital input/output using 8255 in the following configuration:
  • 8 TTL I/O lines.
  • 7 high current lines through relay driver- ULN2003.
  • 3 TTL output lines.
  • 2 TTL input lines.
  • 4 Opto Isolated 2 Input and 2 Output lines.
  • Interrupt facility on Port A and Port B.
  • AUDIO lines are pulled to VCC.
  • 8 line Externally latched digital input port.
TIMER: Three 16 bit Programmable Timer/Counters using 8254.

APPLICATION PROGRAMMER INTERFACE (API): API in C, PASCAL and Assembly language.

ABSOLUTE MAX RATINGS

  • Maximum +ve input voltage : +16.5V
  • Maximum –ve input voltage : -11.4V
  • Maximum difference between DGND and AGND: +1.0V
  • Relay driver rating: 500 mA

ANALOG INPUT

  • Number of input channels: 16 single ended, 8 differential ended.
  • Resolution: 12 bits, 1 in 4096
  • Conversion time : 10µs
  • Input type: Unipolar, Bipolar
  • Analog input: 0 to 10V, +5V, +10V
  • Ranges: Software selectable
  • Input Bias Current: 200 pA Max
  • Input impedance: POWER ON (1 T ohm) POWER OFF: >1 K ohm

DATA ACQUISITION

  • Sampling Rate: 100K samples/sec (Single Channel) (Typical)

ANALOG OUTPUT

  • Number of DACs: 2
  • Type of DAC: 12 bit, multiplying
  • Output Voltage Range: 0-10V, +10V (Software selectable)
  • Current Drive Capacity: + 5 mA.

DIGITAL I/O

  • I/O lines: 8; OUTPUT lines: 3; INPUT lines: 2
  • High Current Relay driver lines: 7
  • Optically isolated lines: 2 Inputs, 2 Outputs
  • Externally latched lines: 8
  • Inputs: TTL Compatible

TIMER CAPABILITY

  • Number of Timers/counters: 3
  • Resolution: 16 bits
  • Base clock: 1.7897725 MHz (0.55873 uS)
  • Outputs: TTL Compatible

INPUT/OUTPUT CONNECTORS

  • ADC and DAC interface cable (25 Pin D-Type female connector to 26 Pin FRC connector of 1 Mt length).
  • 50 pin Berg connector: for DIO Lines

PHYSICAL DIMENSIONS

  • Length: 25.40 cms
  • Height: 10.82 cms (Including the height of the finger connectors)

OPERATING TEMPERATURE

  • 0 TO 700 C.

SOFTWARE

Demo software provided illustrates the working of the card in the polled mode (all the Channels) in both single ended and differential modes, with Software gain selection & operation of the DACs in unipolar and bipolar mode.

Sample programs such as Interrupt Service Routine, data collection in timer triggered mode and data collection under DMA mode are provided.

A test program, to plot a graph for the selected DAC voltage.

LINKABLE ROUTINES

These routines can be linked to the user’s application program written in ‘C’, PASCAL and Assembly. The routines enable various operations on the card such as setting the mode of operation, channel number, range, data collection mode etc.

PACKAGE

The product consists of the following:

  • PC plug-in card.
  • Screw terminal board for analog signal inputs and outputs.
  • ADC and DAC interface cable (25 Pin D-Type female connector to 26 Pin FRC connector of 1M length).
  • Driver & Demo Software.
  • User’s manual.
  • DIO Cable.

PRICE

 

 
Advanced Microcomputer Systems, Inc.
10116 NW 53rd St., Sunrise, FL 33351-8020
Phone: (954) 784-0900 Fax: (954) 784-0904
E-mail: info@advancedmsinc.com