ADC08138 Datasheet | National Semiconductor

Description The ADC08131/ADC08134/ADC08138 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™ serial data exchange standard for easy interface to the COPS™ family of controllers, and can easily interface with standard shift registers or microprocessors. 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. Applications n Digitizing automotive sensors n Process control/monitoring n Remote sensing in noisy environments n Embedded diagnostics Features n Serial digital data link requires few I/O pins n Analog input track/hold function n 4- or 8-channel input multiplexer options with address logic n On-chip 2.5V band-gap reference (±2% over temperature guaranteed) n No zero or full scale adjustment required n TTL/CMOS input/output patible n 0V to 5V analog input range with single 5V power supply Key Specifications n Resolution 8 Bits n Conversion time (f C = 1 MHz) 8 µs (Max) n Power dissipation 20 m W (Max) n Single supply n Total unadjusted error 5 VDC (±5%) ±1⁄2 LSB and ±1 LSB n Linearity Error (VREF = 2.5V) ±1⁄2 LSB n No missing codes (over temperature) n On-board Reference +2.5V ±1.5% (Max) Ordering Information Industrial (- 40˚C ≤ TA ≤ +85˚C) ADC08131CIWM ADC08134CIWM ADC08138CIWM Package M14B M14B M20B TRI-STATE® is a registered trademark of National Semiconductor Corporation. COPS™ microcontrollers and MICROWIRE™ are trademarks of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS010749 .national. Connection Diagrams ADC08138CIWM...