Eight true differential inputs, or eight single-ended inputs optional
Programmable input ranges of:
0-5V, 0-10V, ±5V, ±10V
100KHz sampling rate
On-board pacer clock and counter timers
Four double-buffered analog outputs
Jumper selectable output ranges of:
0-5V, 0-10V, ±5V, ±10V
24 digital I/O lines, type 82C55 with change of state detect on port C, buffers on ports A & B
Flexible configurations to suit your needs
Factory Options: (call for pricing and availability)
4-20mA inputs with offset
Channel by channel pre-amplifier gains of 1-100
+5VDC only operation
0 to +70°C and -40 to +85°C versions available
FUNCTIONAL DESCRIPTION
FLEXIBILITY
The following functions are available in many configurations giving the user the ability to specify exactly what’s needed. Interrupts are individually or globally enabled or disabled via software. A status register is provided to determine the interrupt source.
ANALOG INPUTS
The Analog Inputs feature software programmable gain with ranges of 0-5V, 0-10V, ±5V, and ±10V. The configuration employs an instrumentation pre-amplifier per channel which allows for differential inputs, 200V Common Mode Rejection, high input impedance, and optional factory channel by channel pre-settable gain (1-200) to accommodate low-level inputs from sensors. Inputs 4-20mA are available as a factory-installable option.
ANALOG OUTPUTS
Output ranges of 0-5V, 0-10V, ±5V and ±10V, are field selectable with jumpers. Note that four conversions may take place at once and that, since the D/As are double buffered, data for the next conversion may be loaded simultaneously.
COUNTER TIMERS
The circuit uses an 82C54 (3 sixteen bit counter/timers). The user has access to each counter/timer’s gate, clock, and output signals. The output of counter two can be used to generate an interrupt. The software package supports counting events, frequency output, pulse and frequency measurement.
DIGITAL I/O
The circuit uses an 82C55A PPI with mode 0 supported. Ports A and B (16 lines) are buffered and pulled up to 5V. Port C features Change of State detection.
SOFTWARE
The package includes a graphical Windows setup program detailing all jumper settings. Also included are drivers, samples and utilities for DOS, Windows operating systems (Windows 95, 98, Me, NT4, 2000, XP, and 2003), and Linux. Full register-level support for use in custom real-time or embedded operating systems.
Analog Inputs
No. of Channels: Eight true differential inputs, or eight single-ended inputs optional
Programmable Ranges: 0-5V, 0-10V, ±5V, ±10V, (4-20mA as a factory option)
Conversion Frequency: 100K Samples per Second
Resolution: 12-Bit
Differential Input Impedance: 2Meg Ohms w/pre-amp
Preamplifier gain: 1 standard, Optional gains up to 200 upon request
Reference Output Voltage: 4.096V ±0.02V
Common Mode Voltage: ±200V
Common Mode Rejection Ratio: 86dB typical
Integral Nonlinearity: 1 LSB maximum, Monotonic
Full Power-Down Mode: 1µA maximum
Standby Power-Down Mode: 400µA maximum
Accuracy: 0.2% of full scale
Gain Temperature Coefficient: 6 ppm / °C typical, bipolar; 8ppm/ °C typical, unipolar
Noise levels: ±1 LSB typical
A/D triggering method: Software selectable: programmable timer, program command
Analog Outputs
Channels: 4
Voltage Ranges: 0-5V, 0-10V, ±5V, ±10V
Conversion Frequency: 100K Conversions per second
Resolution 12-Bit
Output Drive Capability: 3 mA per channel
Power-Down Mode Current Draw: 1µA, maximum
Relative Accuracy: ±2 LSB, typical
Trigger Source(s): Software selectable: programmable timer, program command
Digital Inputs/Outputs
Programmable Peripheral Int.: 82C55A
Channels: 24, pulled up to 5V via 10K (or pulled down to ground factory option)
Buffered Channels: 16 (ports A & B)
Input Voltage: Logic low: -0.03V min, 0.8V max;
Logic High: 2.2V min, 5.8V max
Input Current: ±1uA Max
Output Voltage:
Logic low: 0.0V min, 0.4V max
Logic High: 3.7V min, 5.0V max
Output Current:
Ports A and B
Logic low: 64mA Sink
Logic High: 32mA Source
Port C
Logic low: 2.5mA Sink
Logic High: 2.5mA Source
Modes supported: Mode 0 (1 and 2 are factory options)
Datasheet
