ACCES I/O Products, Inc. ISA Bus 12-Bit 8-Input Programmable-Gain A/D Converter and Counter/Timer Card AD12-8G

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ISA Bus 12-Bit 8-Input Programmable-Gain A/D Converter and Counter/Timer Card - AD12-8G - ACCES I/O Products, Inc.
San Diego, CA, USA
ISA Bus 12-Bit 8-Input Programmable-Gain A/D Converter and Counter/Timer Card AD12-8G
Features Eight single-ended or differential analog inputs 12-bit resolution Nine software programmable voltage ranges Programmable scan rate Foreground/backgroun d operation Three 16-bit counter/timers for event counting, pulse and waveform generation, and frequency measurement. Seven bits of digital I/O Can assert interrupts The AD12-8G is an eight-channel, 12-bit, analog/digital card for use in IBM Personal Computers. It is a 3/4 length card that can be installed in expansion slots of ISA-bus computers. All connections are made through a standard 37-pin D type connector that projects through the rear of the computer. ANALOG INPUTS The input analog channels are individually switch selectable for either differential or single-ended input signals. A choice of nine software-selectable voltage ranges are available and the card can withstand ±30 VDC overload and transients of several hundred volts. The A/D converter is a successive-approxima tion type with solid-state input analog multiplexer and sample and hold amplifier. A/D conversion time is typically 25 microseconds. COUNTER/TIMER This card also contains a type 8254 counter/timer chip which has three 16-bit counters. These counters can be used as an A/D pacer clock and/or can be used to measure pulse width, count events, measure or generate frequencies, etc. An on-board 1 MHz crystal controlled clock is hard-wired to one counter input and the clock inputs to the other two counters are available at the I/O connector. All the gate inputs and counter outputs are accessible at the I/O connector. DIGITAL I/O AD12-8G also can accept three bits of digital input and can provide four bits of digital output both in standard TTL/CMOS logic levels. One of these outputs, for example, can be used to initiate an interrupt upon end of A/D conversion. Jumper positions on the card provide means to assert interrupts on your choice of levels 2 through 7.

Features

  • Eight single-ended or differential analog inputs
  • 12-bit resolution
  • Nine software programmable voltage ranges
  • Programmable scan rate
  • Foreground/background operation
  • Three 16-bit counter/timers for event counting, pulse and waveform generation, and frequency measurement.
  • Seven bits of digital I/O
  • Can assert interrupts

The AD12-8G is an eight-channel, 12-bit, analog/digital card for use in IBM Personal Computers. It is a 3/4 length card that can be installed in expansion slots of ISA-bus computers. All connections are made through a standard 37-pin D type connector that projects through the rear of the computer.

ANALOG INPUTS

The input analog channels are individually switch selectable for either differential or single-ended input signals. A choice of nine software-selectable voltage ranges are available and the card can withstand ±30 VDC overload and transients of several hundred volts. The A/D converter is a successive-approximation type with solid-state input analog multiplexer and sample and hold amplifier. A/D conversion time is typically 25 microseconds.

COUNTER/TIMER

This card also contains a type 8254 counter/timer chip which has three 16-bit counters. These counters can be used as an A/D pacer clock and/or can be used to measure pulse width, count events, measure or generate frequencies, etc. An on-board 1 MHz crystal controlled clock is hard-wired to one counter input and the clock inputs to the other two counters are available at the I/O connector. All the gate inputs and counter outputs are accessible at the I/O connector.

DIGITAL I/O

AD12-8G also can accept three bits of digital input and can provide four bits of digital output both in standard TTL/CMOS logic levels. One of these outputs, for example, can be used to initiate an interrupt upon end of A/D conversion. Jumper positions on the card provide means to assert interrupts on your choice of levels 2 through 7.

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Technical Specifications

  ACCES I/O Products, Inc.
Product Category Data Acquisition
Product Number AD12-8G
Product Name ISA Bus 12-Bit 8-Input Programmable-Gain A/D Converter and Counter/Timer Card
Operating Temperature 32 to 140 F (0 to 60 C)
DC Voltage Programmable, ±5V (default), ±10V, ±0.5V, ±0.05V, ±0.01V, 0-10V, 0-1V, 0-0.1V, 0-0.02V.
User Interface Computer Programmable
Data Acquisition Input Module; Input/Output Module
Form Factor PC Board
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