MAX1220BETX+

ADCs/DACs - Special Purpose Overview

The MAX1220BETX+ is a highly integrated system monitoring and control solution featuring an 8-channel, 12-bit Analog-to-Digital Converter (ADC) and eight 12-bit Digital-to-Analog Converters (DACs). It includes an internal 4.096V reference, a temperature sensor with ±1°C accuracy, and four GPIO ports. The device operates on a single +4.75V to +5.25V analog supply and utilizes a 25MHz SPI/QSPI/MICROWIRE-compatible serial interface. Key specifications include a sampling rate of 225ksps, 2µs DAC settling time, and operation within the -40°C to +85°C temperature range in a 36-pin TQFN package.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 8-channel 12-bit SAR ADC with 225ksps sampling rate
• Octal 12-bit DACs with 2µs settling time and ultra-low glitch energy
• Internal 4.096V voltage reference and ±1°C accurate temperature sensor
• On-chip FIFO, channel-scan mode, and data averaging capabilities

ADCs/DACs - Special Purpose Applications

• Controls for Optical Components
• Base-Station Control Loops
• System Supervision and Control
• Data-Acquisition Systems

ADCs/DACs - Special Purpose Procurement Notes

Verify the component authenticity by checking the marking code against the official datasheet. Confirm the suffix ETX corresponds to the 36-pin Thin QFN-EP package. Ensure the ordering information matches the specific voltage requirements, as this variant requires a 4.75V to 5.25V analog supply.

ADCs/DACs - Special Purpose Selection Notes

Select the MAX1220BETX+ when an 8-channel ADC configuration is required, distinguishing it from the 16-channel MAX1257/MAX1258 variants. This part is suitable for designs requiring a 4.096V internal reference and a 5V analog supply domain. Verify that the 4 GPIO pins meet the digital I/O needs, as other family members offer more.

ADCs/DACs - Special Purpose Part Context

This component belongs to the MAX1220/MAX1257/MAX1258 family of multichannel ADCs/DACs. While sharing core architecture, the MAX1220 is distinct due to its 8-channel ADC limit, 4 GPIO count, and fixed 4.096V internal reference. It is designed for applications needing fewer channels than the MAX1257/MAX1258 but retaining full integration.

ADCs/DACs - Special Purpose Replacement Considerations

Direct pin-compatible replacements within the same series include the MAX1257 and MAX1258, though these feature 16 ADC channels and different GPIO counts. Ensure the application can accommodate the additional channels or ignore them if not needed.