Description

The MXB7846EEE+T is a 4-wire touchscreen controller under the product category of Sensor and Detector Interfaces. It is equipped with a 12-bit sampling ADC and a synchronous serial interface. The MXB7846EEE+T offers low on-resistance switches for driving resistive touch screens. It comes with an internal +2.5V reference that can make absolute or ratiometric measurements. Additionally, this device has an on-chip temperature sensor and battery monitoring channel. It has one auxiliary ADC input and all analog inputs are fully ESD protected, eliminating the need for external TransZorb™ devices.

Specifications and features

• ESD-Protected ADC Inputs
• ±15kV IEC 61000-4-2 Air-Gap Discharge
• ±8kV IEC 61000-4-2 Contact Discharge
• Pin Compatible with MXB7843
• +2.375V to +5.25V Single Supply
• Internal +2.5V Reference
• Direct Battery Measurement (0 to 6V)
• On-Chip Temperature Measurement
• Touch-Pressure Measurement
• 4-Wire Touch-Screen Interface
• Ratiometric Conversion
• SPI™/QSPI™, 3-Wire Serial Interface
• Programmable 8-/12-Bit Resolution
• Auxiliary Analog Input
• Automatic Shutdown Between Conversions
• Low Power (External Reference)
• 270µA at 125ksps
• 115µA at 50ksps
• 25µA at 10ksps
• 5µA at 1ksps
• 2µA Shutdown Current

Application Scenarios

The MXB7846EEE+T can be used in the following applications:

• Personal Digital Assistants
• Portable Instruments
• Point-of-Sales Terminals
• Pagers
• Touch-Screen Monitors
• Cellular Phones

Comparison

• Can make absolute or ratiometric measurements
• Comes with an on-chip temperature sensor and battery monitoring channel, as well as the ability to perform touch-pressure measurements without external components
• Has low on-resistance switches for driving resistive touch screens and fully ESD-protected analog inputs
• Programmable 8-/12-Bit resolution

• None identified