ADC121C027CIMKX/NOPB

Analog To Digital Converters (ADC) Overview

The ADC121C027CIMKX/NOPB is a monolithic, 12-bit analog-to-digital converter featuring an I2C-compatible serial interface. It operates from a single +2.7V to +5.5V supply, which also serves as the reference voltage. The device utilizes a successive approximation register architecture with an internal track-and-hold circuit capable of handling input frequencies up to 11MHz. Key electrical parameters include a maximum throughput rate of 188.9 ksps and a typical conversion time of 1µs. Integral and differential non-linearity are specified at ±1 LSB maximum. Power consumption is 0.26mW at 3V and 0.78mW at 5V during normal operation, reducing to less than 1µW in automatic power-down mode.

Analog To Digital Converters (ADC) Feature Summary

• I2C-Compatible 2-Wire Interface supporting Standard, Fast, and High Speed modes
• Out-of-Range Alert Function for monitoring analog input limits
• Automatic Power-Down Mode while not converting
• Three Pin-Selectable Chip Addresses

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 ordering suffix against the manufacturer's current documentation to ensure package type and temperature range alignment. Confirm that the NOPB designation indicates lead-free compliance and RoHS adherence. Cross-reference the full part number with official distributor catalogs to validate availability status and ensure no obsolete or discontinued variants are selected for new designs.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a low-power, small-footprint 12-bit ADC with digital alert capabilities is required. The ADC121C027 variant specifically provides three pin-selectable addresses, distinguishing it from the ADC121C021 which lacks address selection inputs but includes an alert output. Ensure the application requires the SOT package configuration compatible with the ADDR pin functionality rather than the ALERT pin found on other family members.

Analog To Digital Converters (ADC) Part Context

This device belongs to a family of pin-compatible ADCs offering 8, 10, and 12-bit resolutions. It shares the same physical footprint and basic interface structure as the ADC081C021, ADC101C021, ADC121C021, ADC081C027, ADC101C027, and ADC121C027. The ADC121C027 is distinguished by its inclusion of address selection pins (ADR0/ADR1) instead of an alert output, allowing for multiple devices on a single bus without external hardware changes.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible alternatives within the same resolution class include the ADC121C021 and ADC121C021Q. Note that these substitutes feature an ALERT pin instead of the ADDR pin found on the ADC121C027, requiring schematic adjustments if address selection is critical. Lower resolution options like the ADC101C027 or ADC081C027 are also pin-compatible but offer reduced accuracy.