ADC12138CIWM/NOPB

Analog To Digital Converters (ADC) Overview

The ADC12138CIWM/NOPB is a self-calibrating, 12-bit plus sign successive approximation analog-to-digital converter (ADC) manufactured by Texas Instruments. It features an integrated eight-channel configurable input multiplexer and sample/hold circuitry. The device supports serial I/O interfaces including MICROWIRE, SPI, and QSPI-compatible protocols. It operates on a single supply voltage ranging from 3.0V to 5.5V, accommodating both 3.3V and 5V logic levels. Key electrical specifications include a maximum conversion time of 8.8 μs, a throughput time of 14 μs, and an integral linearity error of ±2 LSB after self-calibration. The component is designed for applications requiring low power consumption and high accuracy in data acquisition systems.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 8-channel differential multiplexer with programmable acquisition time
• Self-calibrating architecture that adjusts linearity, zero, and full-scale errors
• Serial I/O compatibility with MICROWIRE, SPI, and QSPI protocols
• Single +3.3V or +5V power supply operation with dedicated analog and digital supplies

Analog To Digital Converters (ADC) Applications

• Pen-based computers
• Portable digitizers
• Global positioning systems (GPS)

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific package configuration, as the CIWM suffix denotes a Wide Body SOIC package. Confirm RoHS compliance status through official manufacturer channels, as older revisions may differ. Ensure the ordering suffix matches the required pinout and thermal characteristics for the target PCB layout.

Analog To Digital Converters (ADC) Selection Notes

Select this component when an eight-channel multiplexed input is required alongside 12-bit resolution. The self-calibration feature reduces the need for external calibration circuits. Verify that the system clock frequency does not exceed the 5 MHz maximum limit for CCLK and SCLK inputs to maintain timing integrity.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADC1213x family, which includes the ADC12130 (2-channel) and ADC12132 (4-channel). The ADC12138 specifically provides the highest channel count within this series. All variants share identical core ADC performance metrics but differ in multiplexer capacity and pin configurations.

Analog To Digital Converters (ADC) Replacement Considerations

Direct functional substitutes within the same family include the ADC12130CIWM/NOPB and ADC12132CIWM/NOPB, provided the reduced channel count meets system requirements. Cross-vendor replacements require verification of pin compatibility and serial interface protocol support.