ADC12138CIMSA

Analog To Digital Converters (ADC) Overview

The ADC12138CIMSA is a 12-bit plus sign successive approximation analog-to-digital converter featuring an integrated eight-channel multiplexer and sample-and-hold circuit. It operates on a single +3.0V to +5.5V supply with power consumption of 33 mW at +5V and 15 mW at +3.3V. The device supports serial I/O compatible with MICROWIRE, SPI, and QSPI protocols. Key electrical specifications include a maximum conversion time of 8.8 μs, a throughput rate of approximately 71.4 kSPS, and an integral linearity error of ±2 LSB after self-calibration. It is housed in a 28-pin SSOP package.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 8-channel differential multiplexer with programmable acquisition time
• Self-calibrating architecture adjusting linearity, zero, and full-scale errors
• Serial interface compatible with MICROWIRE, SPI, and QSPI standards
• Single-supply operation from +3.0V to +5.5V with low power down mode

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 for the CIMSA variant against current Texas Instruments documentation to confirm package type and temperature range availability. Confirm RoHS compliance status as older revisions may differ. Check for obsolete status or replacement recommendations directly from the manufacturer before procurement.

Analog To Digital Converters (ADC) Selection Notes

Select this component when an 8-channel input multiplexer is required alongside 12-bit resolution. Ensure the system clock frequency does not exceed 5 MHz. Verify that the serial interface protocol matches the host controller's capabilities. Consider the thermal resistance of 97°C/W for the SSOP package during thermal management planning.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADC12130/ADC12132/ADC12138 family. The ADC12130 features two channels, the ADC12132 has two channels with different pinout, and the ADC12138 provides eight channels. All share similar core ADC performance but differ in multiplexer configuration and package options.

Analog To Digital Converters (ADC) Replacement Considerations

Direct replacements within the same family include the ADC12130 and ADC12132, though channel counts differ. For legacy versions without NOPB suffixes, check TI's website for current availability as some combinations are marked obsolete.