ADC081S021CISD

Analog To Digital Converters (ADC) Overview

The ADC081S021CISD is a single-channel, 8-bit analog-to-digital converter manufactured by Texas Instruments. It features a successive-approximation register architecture with an internal track-and-hold circuit and operates on a single power supply ranging from 2.7V to 5.25V. The device supports sample rates between 50 ksps and 200 ksps, with a maximum clock frequency of 4 MHz. Key electrical specifications include a typical signal-to-noise ratio (SNR) of 49.6 dB, differential non-linearity (DNL) of ±0.03 LSB, and integral non-linearity (INL) of ±0.04 LSB. Power consumption is 1.3 mW at 3.6V and 7.7 mW at 5.25V in normal mode. It utilizes a SPI/QSPI/Microwave/DSP compatible serial interface.

Analog To Digital Converters (ADC) Feature Summary

• Single-channel 8-bit resolution with no missing codes
• Variable power management with shutdown mode reducing power to 2.6 µW
• High-speed serial interface compatible with SPI, QSPI, Microwire, and DSP standards
• Fully specified performance over a sample rate range of 50 ksps to 200 ksps

Analog To Digital Converters (ADC) Applications

• Portable battery-powered systems
• Remote data acquisition networks
• Industrial instrumentation and control systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the package suffix CISD corresponds to the 6-lead WSON package as indicated in the datasheet pin descriptions. Confirm that the center pad requirement for this specific package variant is addressed in the layout guidelines. Ensure the ordering information matches the exact revision level required for the design.

Analog To Digital Converters (ADC) Selection Notes

Select this component when an 8-bit resolution is sufficient for the application's dynamic range requirements. Consider the 50–200 ksps throughput limit; if higher speeds are needed, evaluate the ADC081S051 or ADC081S101 variants within the same family. Ensure the input signal source impedance is low enough to charge the internal sampling capacitor within the specified acquisition time.

Analog To Digital Converters (ADC) Part Context

The ADC081S021 belongs to the ADC081Sxx1 series of CMOS analog-to-digital converters. It shares pin compatibility with other resolutions and speeds in the family, such as the 10-bit ADC081S101 and 12-bit ADC081S121. This allows for design flexibility while maintaining board footprint consistency across different performance tiers.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible alternatives include the ADC081S051 (200–500 ksps), ADC081S101 (500 ksps–1 Msps), ADC101S021 (10-bit), and ADC121S021 (12-bit). These devices offer functionally identical interfaces but differ in speed or resolution.