ADC12138CIMSA/NOPB

Analog To Digital Converters (ADC) Overview

The ADC12138CIMSA/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 protocols including MICROWIRE, SPI, and QSPI-compatible interfaces. It operates on a single supply voltage ranging from 3.0 V to 5.5 V for both analog and digital domains. 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 housed in a 20-pin SSOP package.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 8-channel analog multiplexer with programmable acquisition time
• Self-calibrating architecture that adjusts linearity, zero, and full-scale errors
• Flexible serial interface supporting MICROWIRE, SPI, and QSPI modes
• Single-supply operation compatible with 3.3 V and 5 V logic levels

Analog To Digital Converters (ADC) Applications

• Pen-based computers
• Digitizers
• Global positioning systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix CIMSA against current manufacturer availability lists, as certain package combinations within the ADC12130/32/38 family are designated as obsolete. Confirm RoHS compliance status and ensure the selected variant matches the required thermal resistance characteristics for the target application environment.

Analog To Digital Converters (ADC) Selection Notes

Select this component when an eight-channel multiplexed input is required alongside high-precision 12-bit resolution. The self-calibration feature minimizes external calibration requirements. Ensure the system clock frequency does not exceed the 5 MHz limit for CCLK and SCLK inputs to maintain specified timing parameters and signal integrity.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADC12130 family, which includes the ADC12130 (2-channel MUX), ADC12132 (2-channel MUX), and ADC12138 (8-channel MUX). All variants share identical core ADC performance metrics but differ in multiplexer channel count and pin configurations. The CIMSA suffix specifically denotes the commercial temperature range and the 20-pin SSOP package type.

Analog To Digital Converters (ADC) Replacement Considerations

Direct functional substitutes within the same family include the ADC12130CIMSA/NOPB and ADC12132CIMSA/NOPB, provided the reduced channel count is acceptable for the design.