ADC121C021CIMM/NOPB

Analog To Digital Converters (ADC) Overview

The ADC121C021CIMM/NOPB is a monolithic, low-power, 12-bit analog-to-digital converter (ADC) manufactured by 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 capable of handling input frequencies up to 11MHz. 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 conversion time of 1µs, and integral/differential non-linearity of ±1 LSB at speeds up to 22ksps. Power consumption is 0.26mW at 3V and 0.78mW at 5V when operating at 22ksps.

Analog To Digital Converters (ADC) Feature Summary

• I²C-Compatible Interface: Supports Standard, Fast, and High-Speed (3.4MHz) communication modes for flexible system integration.
• Out-of-Range Alert Function: Provides an interrupt signal when the analog input violates programmable upper or lower limit values.
• Automatic Power-Down Mode: Reduces power consumption significantly during non-converting periods to extend battery life in portable applications.

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 package type associated with the CIMM suffix against official documentation, as datasheet pinouts distinguish between SOT and VSSOP variants. Confirm that the ordering suffix does not alter the functional capabilities or address selection options defined in the primary specification sheet. Ensure compatibility with required I²C bus voltage levels and pull-up resistor configurations for reliable operation.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring a small footprint and low power consumption with I²C connectivity. Consider the ADC121C027 if pin-selectable addresses are needed instead of the alert function. Verify that the input signal range aligns with the single-supply reference configuration and that the required sampling rate does not exceed the 188.9 ksps maximum throughput.

Analog To Digital Converters (ADC) Part Context

The ADC121C021 belongs to a family of pin-compatible ADCs that also includes 8-bit (ADC081C021) and 10-bit (ADC101C021) resolution variants. These devices share similar physical footprints and interface protocols, allowing for design flexibility across different resolution requirements while maintaining board layout consistency within a product line.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible alternatives within the same family include the ADC101C021 and ADC081C021 for lower resolution needs. For automotive applications, the ADC121C021Q offers AEC-Q100 Grade 2 qualification. The ADC121C027 serves as a functional alternative if address selection is preferred over the alert output feature.