Features

• Industry-standard 12-bit, 20 microsecond A/D converter
• 40 kHz throughput
• ±5, ±10, or 0 to +10 volt analog input range
• Three 16-bit timer/counters, on-board 8 MHz clock
• 2 fast settling, double-buffered, analog output channels;
   ±5, ±10, 0 to +5, or 0 to +10 volt output range
• TTL/CMOS 8255 based programmable digital I/O
  with optional pull-up/pull-down resistors
• Compatible with TMX, USF, MR, OP & OR expansion boards
• rtdLinx® universal TSR DOS driver with calling examples
• QuickBASIC and Turbo C source code

• 16 single-ended analog input channels
• Global resistor-configurable gain

• 8 differential/16 single-ended analog input channels
• Programmable gains of 1, 2, 4 & 8 with on-board gain multiplier (1, 10 & 100 optional)

From the single-ended inputs and resistor configurable gain on the ADA1110 to the user-selectable differential or single-ended inputs and programmable gain on the ADA2110, these 40 kHz multichannel PC/XT/AT boards provide excellent performance and easy operation in industrial and laboratory environments.

Analog Inputs. Depending on the board, one of 16 single-ended or eight differential analog inputs is multiplexed under software control to the sample-and-hold amplifier. The input voltage range for all channels is jumper selectable. For a gain of 1, the resolution is 2.44 millivolts for ranges of ±5 and 0 to +10 volts, and 4.88 millivolts for a range of ±10 volts. On the ADA1110, the gain for all channels is set to any desired value greater than 1 by simply adding feedback resistors to the input amplifier stage. The ADA2110 features binary-programmable gains of 1, 2, 4, and 8 (1, 10, and 100 optional). The unique on-board gain multiplier circuitry lets the user customize the input range. Since the gain and channel number are programmed at the same I/O port, independent channel gain can be achieved by writing a new gain value each time a new channel number is selected.

A/D Conversions. A high performance, industry-standard 12-bit A/D converter accurately digitizes dynamic input voltages captured by the sample-and-hold circuit. A Start Convert command initiates each conversion. Multiple conversions can be done by using an on-board timer/counter to generate interrupts which are used to trigger conversions at the desired sample rate. For higher throughput at a lower resolution, the converter also can be programmed to perform 8-bit conversions.

Analog Outputs. The ADA1110 and ADA2110 feature two independent 12-bit analog output channels with matched D/A converters and fast settling output buffers. The voltage range of each output channel can be independently set to ±5, ±10, 0 to +5, or 0 to +10 volts. Timer/Counters & Digital I/O. Three 8254 based 16-bit, 8 MHz timer/counters support a wide range of timing and counting functions. Sixteen 8255 based TTL/CMOS digital I/O lines are available at the I/O connector.

Recommended Accessories:

• XT50: 3 foot, 50-pin, twisted-pair cable
• TB50: 50-pin screw terminal board
• XB50: 50-pin screw terminal board with prototyping area

Documentation:

• Hardware Manual

Ordering Information

• Part Number: ADA1110
• Part Number: ADA2110

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