MAX11301GTL+

ADCs/DACs - Special Purpose Overview

The MAX11301GTL+ integrates a PIXI™ mixed-signal I/O controller with 20 configurable ports, each supporting 12-bit ADC and DAC functions. It operates from a 5V analog supply (AVDD) and a 1.8V to 5.0V digital supply (DVDD), with port supplies ranging from -12.0V to +12.0V. The device features a 400kHz I²C interface, internal 2.5V voltage references, and programmable sample averaging for noise reduction. ADC throughput reaches 400ksps with 12-bit resolution, while DAC outputs provide up to 25mA drive current. It includes internal and external temperature sensors with ±1°C accuracy and is available in 40-pin TQFN or 48-pin TQFP packages over the -40°C to +105°C range.

ADCs/DACs - Special Purpose Feature Summary

• 20 Configurable PIXI Ports: Each port supports 12-bit ADC/DAC, GPIO, or analog switch modes with selectable voltage ranges (-10V to +10V).
• High-Speed Conversion: ADC throughput up to 400ksps; DAC settling time of 40µs to ±1 LSB with 25mA output drive capability.
• Integrated References & Sensors: Internal 2.5V low-noise voltage references for ADC/DAC; internal/external temperature sensors with ±1°C accuracy.
• Flexible Interface: 400kHz I²C-compatible serial interface; adjacent ports configurable as logic-level translators or 60Ω analog switches.

ADCs/DACs - Special Purpose Applications

• Base-Station RF Power Device Bias Controllers
• System Supervision and Control
• Power-Supply Monitoring
• Industrial Control and Automation
• Control for Optical Components

ADCs/DACs - Special Purpose Procurement Notes

Verify the 'GTL+' suffix indicates the specific package type (TQFN) and lead-free compliance status per the manufacturer's ordering guide. Confirm the revision level matches design requirements. Ensure supply voltages AVDDIO and AVSSIO are set according to the selected port voltage ranges to maintain specified linearity and performance metrics.

ADCs/DACs - Special Purpose Selection Notes

Select this component when a single IC must replace multiple discrete ADCs, DACs, and GPIO drivers. Ensure the application requires high-voltage bipolar port operation within the -12V to +12V range. Verify that the I²C bus speed and address configuration meet system constraints. Consider thermal dissipation if operating near maximum power limits in dense PCB layouts.

ADCs/DACs - Special Purpose Part Context

The MAX11301 belongs to the PIXI family of programmable mixed-signal I/O controllers. It consolidates analog-to-digital conversion, digital-to-analog conversion, and general-purpose I/O into one chip, reducing bill-of-materials count. The GTL+ variant specifically denotes the 40-pin TQFN package option, offering a compact 6mm x 6mm footprint for space-constrained designs.

ADCs/DACs - Special Purpose Replacement Considerations

No direct public substitute part numbers are listed in the datasheet. Evaluate pin-compatible alternatives only if they support identical 20-port PIXI architecture, 12-bit resolution, and similar voltage ranges. Verify electrical specifications match exactly, particularly I²C timing and supply voltage tolerances.

ADCs/DACs - Special Purpose FAQ

What is the maximum ADC throughput rate?

The MAX11301 supports an ADC throughput of up to 400ksps when configured appropriately.

Can adjacent PIXI ports function as logic-level translators?

Yes, adjacent pairs of ports can be configured as logic-level translators for open-drain devices or as analog switches with 60Ω on-resistance.

What is the accuracy of the integrated temperature sensors?

The internal and external temperature sensors offer ±1°C accuracy across the operating temperature range.