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PCMCIA Data Acquisition Card


  • Type II PCMCIA Card
  • 12-bit analog-to-digital converter
  • Up to eight analog inputs
  • 32-sample FIFO buffer
  • Two eight-bit digital I/O ports


Model PAD128 is a type II PCMCIA card (PC card). It performs data acquisition on up to eight analog inputs and provides parallel digital input/output capability for up to 16 bits. A 24-inch long cable that mates with the PAD128 on one end and has a 37-pin male sub-D connector on the other end is available as Model PAD128CAB.


The analog-input configuration is software controlled on a channel-by-channel basis and you can have any combination of single-ended and differential inputs that adds up to eight pins. The PAD128 has the following input range capabilities:
  • Channel 0 and 1: /-10V
  • Channel 2 and 3: /-5V
  • Channel 4 and 5: 0-5V
  • Channel 6 and 7: 0-100mV

Settle time for the input Multiplexer and Sample and Hold amplifier "front end" is programmable to permit use with signals that have source impedances higher than 80 ohms. The analog-to-digital converter provides 12-bit resolution on a 5-volt input voltage range. Overall throughput rate is a maximum of 140,000 samples/second. Conversions can be initiated either by an external "sync" input to the card or by a programmable on-card pacer clock. The A/D converter has self-calibration capability (to eliminate linearity and zero-drift errors) and a 32-sample FIFO buffer. The buffer allows accumulation of data while the computer is servicing other requests.


The PAD128 also has capability for 16 digital input/output bits that can be programmed as inputs or outputs on a groups-of-eight basis. This function is based on the industry-standard type 8255 programmable peripheral interface and the A and B ports are available for use.


Control logic in the PAD128 uses a programmable array and special functions can be factory programmed. If you have need for special functions such as limit comparison, interrupt logic, etc., give us a call.

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Data Acquisition

  • Analog Inputs: As many as 8 single-ended inputs or four differential inputs or both but not to exceed use of eight inputs pins
  • Input Voltage Range: Ch. 0 and 1: /-10V; Ch. 2 and 3: /-5V; Ch. 4 and 5: 0 to 5V; Ch. 6 and 7: 0 to 100mV
  • Common Mode Rejection Ratio (diff'l inputs): 75 db at power line frequency (20 Khz sample rate)
  • Maximum Input Overvoltage w/o Damage: -5V to 10V
  • Full-scale Error (after auto-cal): ±1/2 LSB typical, ±2 LSB max.
  • Integral Linearity (after auto-cal): ±1/2 LSB typical ±1 LSB max.
  • Resolution: 12 bits
  • Throughput Rate: 140K samples/sec.

Digital Input/Output

  • Logic High: 2.0 to 5.0 VDC
  • Logic Low: -0.3 to 0.8 VDC
  • Input Load (high): 3.2 uA
  • Input Load (low): -250 uA
  • Logic High: 2.5 VDC min., source 200 uA
  • Logic Low: 0.5 VDC max., sink 1.7 mA


  • Operating Temperature Range: 0 to 60oC
  • Storage Temperature Range: -50 to 120oC
  • Humidity: 5% to 95%, non-condensing.

Power Required

  • Operating: 5 VDC at 47 mA typical, 65 mA max.

Form Factor

  • PCMCIA type II
Regulatory Compliance
Declaration of Conformity, and Test Reports are on file. Users must use appropriate shielded cables.


Part NumberPrice(USD)
PAD128 289.00
View / Download Manual (in .pdf format)

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Acquisition Control Communications Engineering / Systems
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Address: 1480 Gulf Road, Suite 837,
PO Box 1364
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