ADC121C021CIMMX/NOPB

Analog To Digital Converters (ADC) Overview

The ADC121C021CIMMX/NOPB is a monolithic, low-power, 12-bit analog-to-digital converter (ADC) from Texas Instruments. It operates from a single +2.7V to +5.5V supply and utilizes a successive approximation register (SAR) architecture with an internal track-and-hold circuit. The device features an I²C-compatible 2-wire serial interface supporting Standard (100kHz), Fast (400kHz), and High Speed (3.4MHz) modes. Key specifications include a maximum throughput rate of 188.9 ksps, typical power consumption of 0.26mW at 3V, and an out-of-range alert function. It is housed in a compact 6-pin SOT package.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with no missing codes and ±1 LSB max INL/DNL
• I²C-compatible interface with up to 3.4MHz high-speed mode support
• Out-of-range alert function for programmable upper/lower limit monitoring
• Automatic power-down mode reducing consumption to <1µW

Analog To Digital Converters (ADC) Applications

• System monitoring
• Peak detection
• Portable instruments
• Medical instruments
• Test equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'CIMMX' against official documentation to confirm package type and temperature range. Ensure compatibility with I²C bus voltage levels (2.7V to 5.5V). Confirm that the selected variant meets the required operating temperature range of -40°C to +105°C for industrial applications.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring low power consumption and small footprint. The ADC121C021 lacks address selection pins; use ADC121C027 if multiple devices on one bus are needed. Consider the alert feature for simple threshold monitoring without continuous polling. Ensure input signals remain within the 0V to VA range.

Analog To Digital Converters (ADC) Part Context

The ADC121C021 is part of a pin-compatible family including 8-bit (ADC081C021) and 10-bit (ADC101C021) variants. It shares the same 6-pin SOT package and basic functionality as the ADC121C027, which adds address selection inputs. The automotive-grade version is designated as ADC121C021Q.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible alternatives include ADC121C027 (with address pins), ADC101C021, and ADC081C021. Verify interface compatibility and resolution requirements when substituting.