ADC121S021CISD

Analog To Digital Converters (ADC) Overview

The Texas Instruments ADC121S021CISD is a single-channel, 12-bit analog-to-digital converter utilizing a successive-approximation register architecture. It operates on a single supply voltage ranging from +2.7V to +5.25V and supports sample rates between 50 ksps and 200 ksps. The device features a high-speed serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards. Typical performance includes a signal-to-noise ratio of 72.3 dB and power consumption as low as 1.5 mW at 3.6V. It is housed in a 6-lead WSON package (NGF0006A) suitable for industrial temperature ranges.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with no missing codes over the specified operating range
• Variable power management with normal mode consumption of 1.5 mW (at 3.6V) and shutdown mode down to 2.6 µW
• High-speed serial interface compatible with standard protocols including SPI and MICROWIRE
• Integrated track-and-hold circuit with typical aperture jitter of 30 ps

Analog To Digital Converters (ADC) Applications

• Portable battery-powered systems requiring low power consumption
• Remote data acquisition networks
• Instrumentation and control systems

Analog To Digital Converters (ADC) Procurement Notes

Verify that the ordering suffix CISD corresponds to the 6-lead WSON package (NGF0006A). Confirm that the center pad connection to ground is implemented if required by the specific layout guidelines for this package variant. Ensure the component source provides valid production data documentation.

Analog To Digital Converters (ADC) Selection Notes

Select the ADC121S021CISD when a single-channel 12-bit conversion is required within the 50 ksps to 200 ksps throughput range. This model is appropriate for designs constrained by the 6-lead WSON footprint. Consider pin-compatible alternatives such as the ADC121S051 or ADC121S101 if higher sampling speeds are necessary.

Analog To Digital Converters (ADC) Part Context

The ADC121S021CISD belongs to the ADC121Sxx family of single-channel CMOS ADCs. These devices share identical pinouts and functional compatibility across different speed grades. The 'CISD' suffix specifically identifies the commercial temperature range (-40°C to +85°C) and the WSON package type.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible substitutes include the ADC121S051 (200–500 ksps) and ADC121S101 (500 ksps–1 Msps). Lower resolution options like the ADC101S021 and ADC081S021 are also functionally interchangeable.