MXB7843EUE+T

Overview

The MXB7843EUE+T is a 4-wire resistive touchscreen controller manufactured by Analog Devices Inc. (Maxim Integrated). It integrates a 12-bit sampling analog-to-digital converter (ADC) with a synchronous serial interface and low on-resistance switches for driving resistive touch screens. The device operates on a single supply voltage ranging from +2.375V to +5.25V and supports both absolute and ratiometric measurements using an external reference. It features fully ESD-protected analog inputs, eliminating the need for external protection components.

Feature Summary

• Integrates a 12-bit ADC with SPI/QSPI 3-wire serial interface
• Low power consumption: 2µA shutdown current, 270µA at 125ksps
• Pin compatible with MXB7846 model
• ESD protection on all analog inputs per IEC 61000-4-2 standards

Applications

• Personal Digital Assistants (PDA)
• Cellular Phones
• Point-of-Sales (POS) Terminals
• Touch-Screen Monitors

Part Context

The MXB7843EUE+T belongs to the Maxim Integrated MXB784x family of touchscreen controllers. It is designed as a cost-effective solution for portable devices requiring resistive touch input. The 'EUE' suffix indicates a specific package variant, typically TSSOP or QSOP, while '+T' denotes tape-and-reel packaging for automated assembly.

Replacement Considerations

The MXB7846 is a pin-compatible alternative within the same product family. Designers should verify if additional features in the MXB7846, such as internal references or battery monitoring channels, are required for the specific application.