ADC08138CIWM

Analog To Digital Converters (ADC) Overview

The ADC08138CIWM is an obsolete 8-bit successive approximation analog-to-digital converter manufactured by Texas Instruments. It features a serial digital data link compliant with the MICROWIRE standard, requiring minimal I/O pins for processor interfacing. The device includes an on-chip 2.5V band-gap voltage reference and a track/hold function that allows analog input variation during conversion. It supports up to eight configurable analog channels with single-ended, differential, or pseudo-differential modes. Operating from a single 4.5V to 6.3V supply, it delivers a maximum conversion time of 8 µs at a 1 MHz clock frequency.

Analog To Digital Converters (ADC) Feature Summary

• 8-Bit SAR Architecture: Provides high-speed conversion with a maximum time of 8 µs at fC = 1 MHz.
• Configurable Multiplexer: Supports 8-channel input with software-selectable single-ended, differential, or pseudo-differential configurations.
• Integrated Reference: Includes an on-board 2.5V band-gap reference with ±2% accuracy over temperature.
• Serial Interface: Compatible with MICROWIRE standards, allowing direct connection to COPS controllers or microprocessors.

Analog To Digital Converters (ADC) Applications

• Digitizing automotive sensors
• Process control and monitoring systems
• Remote sensing in noisy environments
• Embedded diagnostics

Analog To Digital Converters (ADC) Part Context

The ADC08138CIWM belongs to the ADC0813x family, which also includes the ADC08131 (1 channel) and ADC08134 (4 channels). All three share identical core specifications regarding resolution, speed, and interface protocols, differing only in the number of available analog input channels and package pin counts. This specific model represents the highest channel count variant in the series.

Analog To Digital Converters (ADC) Replacement Considerations

This component is marked as OBSOLETE by Texas Instruments. Designers should consult current product selection guides for modern replacements within the ADC08xx series or other compatible 8-bit SAR converters with integrated multiplexers and serial interfaces.