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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 comply with the NSC MICROWIRETM 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 combinations of single-ended, differential, or pseudo-differential modes. In addition, input voltage spans as small as 1V can be accommodated.
ADC08234 Maximum Ratings
Supply Voltage (VCC) 6.5V Voltage at Inputs and Outputs -0.3V to VCC + 0.3V Power Dissipation at TA e 25§C (Note 5) 800 mW ESD Susceptibility (Note 6) 1500V
ADC08234 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 (g2% over temperature guaranteed) No zero or full scale adjustment required TTL/CMOS input/output compatible 0V to 5V analog input range with single 5V power supply Pin compatible with Industry-Standards ADC0831/4/8
ADC08234 Typical Application
High-speed data acquisition Digitizing automotive sensors Process control/monitoring Remote sensing in noisy environments Disk drives Portable instrumentation Test systems