ADC08238 Datasheet | National Semiconductor

Description The ADC08231 ADC08234 ADC08238 are 8-bit successive approximation A D converters with serial I O and configurable input multiplexers with up to 8 channels The serial I O is configured to ply with the NSC MICROWIRE TM serial data exchange standard for easy interface to the COPSTM family of controllers and can easily interface with standard shift registers or microprocessors Designed for high-speed low-power applications the devices are capable of a fast 2 ms conversion when used with a 4 MHz clock All three devices provide a 2 5V band-gap derived reference with guaranteed performance over temperature A track hold function allows the analog voltage at the positive input to vary during the actual A D conversion The analog inputs can be configured to operate in various binations of single-ended differential or pseudo-differential modes In addition input voltage spans as small as 1V can be acmodated Features Serial digital data link requires few I O pins Analog input track hold function 4- or 8-channel input multiplexer options with address logic On-chip 2 5V band-gap reference ( g 2% over temperature guaranteed) No zero or full scale adjustment required TTL CMOS input output patible 0V to 5V analog input range with single 5V power supply Pin patible with Industry-Standards ADC0831 4 8 Key Specifications Y Y Y Y Y Y Y Y Applications Y Y Y Y Y Y Y High-speed data acquisition Digitizing automotive sensors Process control monitoring Remote sensing in noisy environments Disk drives Portable instrumentation Test systems Resolution 8 Bits Conversion time (f C e 4 MHz) 2 ms (Max) Power dissipation 20 m W (Max) Single supply 5 VDC ( g 5%) g Total unadjusted error LSB and g 1 LSB g Linearity Error (VREF e 2 5V) LSB No missing codes (over temperature) a 2 5V g 1 5% (Max) On-board Reference ADC08238 Simplified Block Diagram TL H 11015 - 4 TRI-STATE is a registered trademark of National Semiconductor Corporation COPSTM microcontrollers and...