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Embedded Computers for Instruments and Automation Catalog

The Analog I/O WildcardTM

Interface to any analog sensor or actuator with eight 16-bit analog inputs and eight 12-bit analog outputs.

unipolar & differential 16 bit & 12 bit resolution analog inputs & outputs

This general purpose Analog I/O Wildcard features eight channels unipolar, single-ended or four channels unipolar, differential 16-bit resolution analog voltage inputs and eight channels of 12-bit resolution analog voltage outputs. Inputs and outputs use onboard or external references, and the onboard references are optionally provided as excitations for external circuitry.

This tiny 2" by 2.5" module is a member of the WildcardTM series that connects to any of Mosaic's controllers. A field header brings out the analog I/O signals for the reference, DAC outputs, and A/D inputs.

Pre-coded Software

A package of pre-coded device driver functions makes it easy to use the Analog I/O Wildcard. High level functions initialize the A/D and DAC, acquire 16-bit samples from the A/D, and write 12-bit values to the DAC. This code is available as a pre-compiled "kernel extension" library to C and Forth programmers.

Specifications

Analog Inputs
Channels: 8 unipolar single-ended, or 4 unipolar differential inputs
Resolution: 16-bits ( 0 - 65,535 counts)
Input Filtering: Land patterns are provided for optional input RC filters
Input Voltage Range: +IN: -0.2 V to 5.2 V
-IN: -0.2 V to 1.25 V
FS Differential Range: Jumper selectable full scale (FS) reference: 1.024 V, 2.048 V, 4.096 V, 5.0 V, or external.
Excitation: Jumper selectable excitation output voltage of: 1.024 V, 2.048 V, 4.096 V, or 5.0 V.
Non-Linearity: Integral: ± 8 LSB max, ± 3 LSB typ;
Differential: ± 1 LSB typ
Noise and Accuracy: 20 uV rms effective input noise; 14.4 bits effective resolution
Sample Rate: Up to 17k samples per second
Analog Outputs
Channels: 8 unipolar outputs
Resolution: 12-bits ( 0 - 4095 counts)
Output Filtering: Land patterns are provided for optional output RC filters
Output Voltage Range: Jumper selectable: 2.048 V, 4.096 V, or 2x external reference; 4.6 V max.
Settling Time: 1 microsec typically, slew rate is typically 10V/microsec
Load Impedance: Capable of driving 2 kOhm minimum resistance, 100 pF maximum capacitance, see data sheet for load regulation
Non-Linearity: Integral: ± 2 LSB max;
Differential: ± 0.5 LSB typ
Update Rate: Up to 15k samples per second

Documentation (html)(pdf)


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