MAX1223BETX+

ADCs/DACs - Special Purpose Overview

The MAX1223BETX+ is a single-chip data acquisition system integrating a 12-bit, 225ksps analog-to-digital converter (ADC) and an octal 12-bit digital-to-analog converter (DAC). The ADC features a true-differential track/hold with 12 single-ended or six differential input channels. The DAC outputs settle within 2.0µs with ultra-low glitch energy of 4nV·s. Key specifications include ±0.5 LSB INL/DNL for both converters, an internal 2.5V reference, and an on-chip FIFO storing 16 conversion results. It operates from +2.7V to +5.25V supplies, consuming 2.5mA at full throughput and under 0.2µA in shutdown.

ADCs/DACs - Special Purpose Feature Summary

• 12-Bit ADC with 225ksps rate, 12 single-ended/six differential inputs, and ±0.5 LSB INL/DNL
• Octal 12-Bit DAC with 2.0µs settling time, 4nV·s glitch energy, and ±0.5 LSB INL
• On-chip 16-word FIFO, internal temperature sensor (±1°C accuracy), and GPIO ports
• Single-supply operation (+2.7V to +5.25V) with AutoShutdown™ and low power consumption

ADCs/DACs - Special Purpose Applications

• Closed-loop controls for optical components
• Base station system supervision and control
• Data-acquisition systems requiring multichannel monitoring

ADCs/DACs - Special Purpose Procurement Notes

Verify the component is the MAX1223BETX+ variant specifically, as the family includes MAX1221 and MAX1343 with different channel counts. Confirm the package is the 36-pin Thin QFN-EP (T3666-3). Ensure the operating environment stays within the specified -40°C to +85°C range and supply voltages do not exceed 5.25V.

ADCs/DACs - Special Purpose Selection Notes

Select this model over MAX1221 if 12 ADC channels are required instead of 8. Choose MAX1343 if only 4 DAC channels are needed alongside 8 ADC channels. Verify that the 2.5V internal reference meets system requirements or configure for external reference modes. Ensure the host interface supports SPI/QSPI/MICROWIRE protocols at up to 25MHz.

ADCs/DACs - Special Purpose Part Context

This device belongs to the MAX1221/MAX1223/MAX1343 family of 12-bit multichannel ADCs/DACs. It shares the same 36-pin Thin QFN package and core architecture but differs in analog input/output channel configurations. The MAX1223 specifically provides the highest ADC channel count (12) among the variants while maintaining all eight DAC outputs.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers: None.