ADC121S021CIMFX

Analog To Digital Converters (ADC) Overview

The ADC121S021CIMFX is a single-channel, 12-bit analog-to-digital converter from Texas Instruments. It operates with a sample rate range of 50 ksps to 200 ksps and supports a clock frequency up to 20 MHz. The device uses a successive-approximation register architecture with an internal track-and-hold circuit. It functions on a single power supply ranging from +2.7V to +5.25V. Typical power consumption is 1.5 mW at 3.6V and 7.9 mW at 5.25V during normal operation. Key electrical specifications include a typical Signal-to-Noise Ratio (SNR) of 72.3 dB and a Differential Non-Linearity (DNL) of +0.45/-0.25 LSB.

Analog To Digital Converters (ADC) Feature Summary

• 12-Bit Resolution: Provides high precision with no missing codes across the operating temperature range.
• High-Speed Serial Interface: Compatible with SPI, QSPI, MICROWIRE, and DSP standards using a simple three-wire interface.
• Low Power Consumption: Consumes as low as 2.6 µW in shutdown mode, making it suitable for battery-powered applications.
• Wide Supply Range: Operates reliably with a single supply voltage between +2.7V and +5.25V.

Analog To Digital Converters (ADC) Applications

• Portable Systems
• Remote Data Acquisition
• Instrumentation and Control Systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the ordering suffix 'X' indicates tape and reel packaging when sourcing this component. Confirm that the specific revision matches the required design specifications. Ensure compatibility with the target system's logic levels, as digital inputs are rated for up to +5.25V regardless of the analog supply voltage.

Analog To Digital Converters (ADC) Selection Notes

Select the ADC121S021CIMFX when a balance of 12-bit resolution and moderate sampling speed (up to 200 ksps) is required. Consider the pin-compatible alternatives within the family if higher speeds (500 ksps or 1 Msps) or different resolutions (8-bit or 10-bit) are needed without changing the PCB layout.

Analog To Digital Converters (ADC) Part Context

This component belongs to the ADC121S series of CMOS analog-to-digital converters. It is functionally and pin-compatible with other devices in the family, such as the ADC121S051 and ADC121S101, which offer higher sampling rates. It is also compatible with lower-resolution variants like the ADC101S021 and ADC081S021.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible substitutes include the ADC121S051 for higher speed (200-500 ksps) and the ADC121S101 for even faster conversion (500 ksps-1 Msps). Lower-speed options like the ADC121S021 in different packages may also serve as direct replacements if package form factor allows.