September 19, 2008 5:00 PM

From Microcomputer Systems, Inc.

MSI-P442 PC/104 Thermocouple (12 Type K) and Analog I/O Card

Contact Name: John Hilburn
Contact Email: staff@microcomputersystems.com
WebSite: http://www.microcomputersystems.com/msi_1060.htm

The MSI-P442 is a low cost, high performance thermocouple and 12-bit analog I/O card designed for use embedded laboratory instruments and robotic systems. Four models provide various combinations of thermocouple and analog input and output combinations which operate from the PC/104 bus +5V supply. Software programmable input ranges are 0-5V, 0-10V, ±5V and ±10V with a linearity of 1/2 LSB. In addition, a fault condition on any channel will not effect the conversion result on the selected channel. 
 
T/C Conditioners - Twelve Analog Devices AD597 (Type K, -200°C to 1000°C) thermocouple conditioners are used to provide ice point compensation and 10mV/°C operation. 
 
A/D Converters - Up to two MAX197 8-channel provide A/D converters that incorporate a precision 2.5V reference source with buffer amp, an internal 1.56 MHz clock, and successive approximation and internal input track/hold circuitry to convert the analog signal of each channel into a 12-bit digital signal. Low span and offset errors result in no adjustments being required for these functions. Typical total conversion times of 12 us gives a sample rate of 83 ksps for each group of eight channels yielding rates up to 166 ksps for 16 input channels. 
 
D/A Converter - An AD5341 provides a 12-bit converter with a 0-5V output voltage. The device contains a 12-bit output data register and an output data latch. The addresses of the output data register consist of two bytes (Hi and Lo bytes). 
 
Operates from -40° to 85° C and requires only +5V.