MAX1233ETI+

Overview

The MAX1233ETI+ is a touchscreen controller manufactured by Analog Devices Inc./Maxim Integrated, housed in a 28-WFQFN (5x5) package. It operates within a supply voltage range of 2.7V to 3.6V and supports an operating temperature range of -40°C to +85°C. The device features a 12-bit analog-to-digital converter with configurable resolutions of 12, 10, or 8 bits, offering adjustable conversion rates from 3.5μs to 280μs. Communication is handled via an SPI interface compatible with standard modes 0 and 3.

Feature Summary

• Integrates a 12-bit successive-approximation ADC subsystem supporting multiple input channels
• Includes an 8-bit voltage output digital-to-analog converter for precise signal generation
• Features a dedicated four-wire resistive touchscreen driver circuit for interface control
• Provides a 4x4 matrix keyboard controller alongside eight configurable general-purpose I/O pins

Applications

• Embedded system designs requiring high-resolution touch input
• Industrial control panels utilizing resistive touchscreen interfaces
• Consumer electronics with integrated keypad functionality
• Portable devices needing efficient power management through separate AVDD/DVDD rails

Procurement Notes

Verify the specific manufacturer designation, as sources list both Maxim Integrated and Analog Devices Inc. Confirm the package type is 28-WFQFN Exposed Pad. Ensure the supply voltage requirements align with your 2.7V to 3.6V design constraints. Check for RoHS compliance status if environmental regulations apply to your project.

Selection Notes

Select this component when a 3.3V logic interface is required for touchscreen applications. It is suitable for designs needing simultaneous touch, keyboard, and GPIO handling without external multiplexing. Consider the 28-TQFN footprint for space-constrained PCB layouts. Verify SPI mode compatibility with your host microcontroller before integration.

Part Context

This part belongs to the MAX1233/MAX1234 series of touchscreen controllers designed for embedded systems. While the MAX1234 operates at 5.0V, the MAX1233 variant is optimized for lower voltage environments. Both share similar architectural features including integrated ADC, DAC, and keyboard scanning capabilities within a compact surface-mount package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.