ADC12138CIN/NOPB

Analog To Digital Converters (ADC) Overview

The ADC12138CIN/NOPB is a self-calibrating 12-bit plus sign successive approximation Analog-to-Digital Converter (ADC) featuring an integrated 8-channel analog multiplexer and sample/hold circuit. It supports serial I/O compatible with MICROWIRE, SPI, and QSPI protocols. The device operates on a single +3.0V to +5.5V supply, accommodating a 0V to 5V analog input range. 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. Power consumption is specified at 33 mW maximum under +5V operation.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 8-channel differential multiplexer with programmable acquisition time
• Self-calibrating architecture adjusts linearity, zero, and full-scale errors
• Serial I/O interface supporting MICROWIRE, SPI, and QSPI modes
• Single-supply operation from +3.0V to +5.5V with power-down mode

Analog To Digital Converters (ADC) Applications

• Pen-based computers
• Data digitizers
• Global Positioning Systems (GPS)

Analog To Digital Converters (ADC) Procurement Notes

Verify the package designation 'CIN' corresponds to the 28-pin MDIP configuration as indicated in the datasheet thermal resistance tables. Confirm that the 'NOPB' suffix denotes lead-free and RoHS compliance. Ensure the specific ordering code matches the required pin count for the 8-channel multiplexer variant, distinct from the 2-channel or single-channel versions in the family.

Analog To Digital Converters (ADC) Selection Notes

Select this component when an 8-channel input multiplexer is required alongside 12-bit resolution. The self-calibration feature reduces the need for external zero and full-scale adjustment circuits. Verify that the system clock frequency does not exceed the 5 MHz maximum limit for both CCLK and SCLK inputs. Ensure the analog source impedance remains below 25 Ω to maintain specified accuracy levels.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADC12130 family, which includes the ADC12130 (2-channel MUX) and ADC12132 (2-channel MUX). The ADC12138 specifically provides an 8-channel multiplexer. All variants share identical core ADC performance characteristics, including resolution, speed, and serial interface protocols, differing primarily in the number of available analog input channels.

Analog To Digital Converters (ADC) Replacement Considerations

Direct functional replacements within the same family include the ADC12130 and ADC12132, though these offer fewer multiplexer channels. Cross-family replacements require verification of pin compatibility and serial protocol support. Note that some product/package combinations in this series may be obsolete; consult current manufacturer availability lists before substitution.