ADC0831 Parallax

ADC0831/ADC0832/ADC0834/ADC0838 8-Bit Serial I/O A/D Converters with Multiplexer Options August 1999 ADC0831/ADC0832/ADC0834/ADC0838 8-Bit Serial I/O A/D Converters with Multiplexer Options n Operates ratiometrically or with 5 V voltage DC General Description reference The ADC0831 series are 8-bit successive approximation A/D n No zero or full-scale adjust required converters with a serial I/O and configurable input multiplex- n 2-, 4- or 8-channel multiplexer options with address logic ers with up to 8 channels. The serial I/O is configured to n Shunt regulator allows operation with high voltage comply with the NSC MICROWIRE serial data exchange supplies standard for easy interface to the COPS family of proces- n 0V to 5V input range with single 5V power supply sors, and can interface with standard shift registers or Ps. n Remote operation with serial digital data link The 2-, 4- or 8-channel multiplexers are software configured n TTL/MOS input/output compatible for single-ended or differential inputs as well as channel as- n 0.3 standard width, 8-, 14- or 20-pin DIP package signment. n 20 Pin Molded Chip Carrier Package (ADC0838 only) The differential analog voltage input allows increasing the n Surface-Mount Package 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 Key Specifications to the full 8 bits of resolution. n Resolution 8 Bits 1 n Total Unadjusted Error 2 LSB and 1 LSB Features n Single Supply 5 V DC n NSC MICROWIRE compatible direct interface to n Low Power 15 mW COPS family processors n Conversion Time 32 s n Easy interface to all microprocessors, or operates stand-alone Typical Application DS005583-1 TRI-STATE is a registered trademark of National Semiconductor Corporation. COPS and MICROWIRE are trademarks of National Semiconductor Corporation. 1999 National Semiconductor Corporation DS005583 www.national.comConnection Diagrams ADC0838 8-Channel Mux ADC0834 4-Channel MUX Small Outline/Dual-In-Line Package ADC0832 2-Channel MUX Small Outline/Dual-In-Line Package (WM and N) Dual-In-Line Package (N) (WM and N) DS005583-31 COM internally connected to GND. V internally connected to V . REF CC Top View DS005583-30 Top View COM internally connected to A GND Top View DS005583-8 Top View Top View ADC0832 2-Channel MUX ADC0831 Single Small Outline Package (WM) ADC0831 Single Differential Input Differential Input Small Outline Package (WM) Dual-In-Line Package (N) DS005583-32 Top View DS005583-41 Top View DS005583-42 Top View ADC0838 8-Channel MUX Molded Chip Carrier (PCC) Package (V) DS005583-33 www.national.com 2