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8-Bit Serial I/O A/D Converter with Multiplexer Option
National Semiconductor
Description
The ADC0831 series are 8-bit successive approximation A/D converters with a serial I/O and configurable input multiplexers with up to 8 channels. The serial I/O is configured to comply with the NSC MICROWIRE™ serial data exchange standard for easy interface to the COPS™ family of processors, and can interface with standard shift registers or µPs. The 2-, 4- or 8-channel multiplexers are software configured for single-ended or differential inputs as well as channel assignment. The differential analog voltage input allows increasing the common-mode rejection and offsetting the analog zero input voltage value. In addition, the voltage reference input can be adjusted to allow encoding any smaller analog voltage span to the full 8 bits of resolution.
Features
• NSC MICROWIRE compatible-direct interface to COPS family processors
• Easy interface to all microprocessors, or operates "stand-alone"
• Operates ratiometrically or with 5 VDC voltage reference
• No zero or full-scale adjust required
• 2-, 4- or 8-channel multiplexer options with address logic
• Shunt regulator allows operation with high voltage supplies
• 0V to 5V input range with single 5V power supply
• Remote operation with serial digital data link
• TTL/MOS input/output compatible
• 0.3" standard width, 8-, 14- or 20-pin DIP package
• 20 Pin Molded Chip Carrier Package (ADC0838 only)
• Surface-Mount Package
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