ADC121S101CISDX

Analog To Digital Converters (ADC) Overview

The ADC121S101CISDX is a single-channel, 12-bit CMOS analog-to-digital converter (ADC) from Texas Instruments. It utilizes a successive-approximation register architecture with an internal track-and-hold circuit and operates on a single power supply ranging from 2.7V to 5.25V. The device supports sample rates between 500 ksps and 1 Msps, consuming 2.0 mW at 3V and 10 mW at 5V in normal mode. It features a high-speed serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards. Typical linearity specifications include DNL of +0.5/-0.3 LSB and INL of ±0.40 LSB.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with 500 ksps to 1 Msps specified sample rate range
• Single supply operation from 2.7V to 5.25V with low power consumption
• 6-lead SOT-23 package with exposed pad for thermal grounding
• Compatible with standard digital interfaces including SPI, QSPI, and MICROWIRE

Analog To Digital Converters (ADC) Applications

• Portable battery-powered systems
• Remote data acquisition networks
• Instrumentation and control systems
• Automotive electronic applications

Analog To Digital Converters (ADC) Procurement Notes

Verify the component authenticity by checking the manufacturer's marking code against official documentation. Confirm that the ordering suffix CISDX corresponds to the specific SOT-23-6 package variant with the exposed ground pad configuration required for your PCB layout.

Analog To Digital Converters (ADC) Selection Notes

Select this model when a small footprint and low power consumption are critical constraints. Ensure the system clock frequency remains within the 25 kHz to 20 MHz range to maintain guaranteed performance. Verify that the analog input voltage stays within the 0V to VA range to prevent ESD diode conduction.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADC121S101 family, which includes variants like the ADC121S101-Q1 for automotive qualification. The CISDX suffix specifically denotes the SOT-23 package type. Pin-compatible alternatives exist across different resolutions and speeds within the same product family.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible alternatives include the ADC121S051 and ADC121S021 for lower speed requirements, or the ADC101S101 and ADC081S101 for reduced resolution needs. All listed alternatives maintain full pin and function compatibility.