8-bit Analog Data Acquisition And Monitoring Systems

The ADC0851 and ADC0858 are 2 and 8 input Analog data acquisition systems. They CAN function as conventional mul- tiple input A/D converters Automatic scanning A/D convert- ers or programmable Analog watchdog systems. In watchdog mode they monitor Analog inputs and deter- mine whether these inputs are inside or outside user pro- grammed window limits. This monitoring process takes place independent of the host processor. When any input falls outside of its programmed window limits, an interrupt is automatically generated which flags the processor; the chip CAN then be interrogated as to exactly which channels crossed which limits. The advantage of this approach is that its frees the proces- sor from having to frequently monitor Analog variables. It CAN consequently save having to insert many A/D subrou- tine calls throughout real time application code. In control systems where many variables are continually being moni- tored this CAN significantly free up the processor, especially if the variables are DC or slow varying signals. The Auto A/D conversion feature allows the device to scan through selected input channels, performing an A/D conver- sion on each channel without the need to select a new channel after each conversion. By National Semiconductor Corporation
ADC0851 's PackagesADC0851 's pdf datasheet

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ADC0851 Application circuits
ADC0851 circuits
This is one application circuit of ADC0851,If you need more circuits,please download ADC0851's pdf datasheet.

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