MX7821KR

Analog To Digital Converters (ADC) Overview

The MX7821KR is an 8-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. / Maxim Integrated, housed in a 20-pin SOIC package. It utilizes a half-flash architecture with an integrated track-and-hold circuit to achieve a sampling rate of 500 kS/s and a conversion time of 660 ns. The device operates on a single 5 V supply, consuming 50 mW of power. It features a single-ended input type, parallel interface, and external reference requirement. Key performance metrics include a signal-to-noise ratio (SNR) of 45 dB and a gain error of 1 LSB, suitable for high-speed data acquisition applications within the commercial temperature range of 0°C to +70°C.

Analog To Digital Converters (ADC) Feature Summary

• Half-flash architecture with integrated track-and-hold for 500 kS/s sampling
• Microprocessor-compatible parallel digital output interface
• Low power consumption of 50 mW at 5 V supply
• CMOS technology ensuring compatibility with standard logic families

Analog To Digital Converters (ADC) Applications

• High-speed data acquisition systems
• Industrial process control monitoring
• Medical instrumentation requiring fast signal digitization
• Test and measurement equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'KR' against the official datasheet to confirm the tape-and-reel packaging format and RoHS compliance status. Confirm that the component is sourced from authorized distributors to ensure authenticity, as legacy Maxim parts are now managed under Analog Devices. Check for any obsolescence notices or lifecycle status updates directly from the manufacturer's current product database.

Analog To Digital Converters (ADC) Selection Notes

Select the MX7821KR when an 8-bit resolution and 500 kS/s throughput are required with minimal external components due to the integrated track-and-hold. Ensure the application supports a single 5 V supply and can accommodate the parallel interface timing requirements. Compare against the MX7820 series if an internal voltage reference is needed, noting that the MX7821 requires an external reference.

Analog To Digital Converters (ADC) Part Context

The MX7821KR belongs to the MX7821 family of high-speed ADCs originally developed by Maxim Integrated before its acquisition by Analog Devices. This series is designed for applications demanding fast conversion speeds without the complexity of multi-channel multiplexing found in other variants like the MX7828. The KR suffix specifically denotes the surface-mount SOIC-20 package configuration.

Analog To Digital Converters (ADC) Replacement Considerations

For pin-compatible replacements within the same family, consider the MX7821KP (PDIP package) or MX7821KEQP (PLCC package). If an internal reference is preferred, the MX7820KN+ offers similar speed but includes an on-chip reference. Verify electrical parameters such as SNR and power dissipation when substituting.