General Description

The XPT2046 is a 4-wire resistive touch screen controller that incorporates a 12-bit 125 kHz sampling SAR typeA/D converter.

The XPT2046 operates down to 2.2V supply voltage and supports digital I/O interface voltage from 1.5V to VCC in order to connect low voltage uP.

The XPT2046 can detect the pressed screen location by performing two A/D conversions. In addition to location,

the XPT2046 also measures touch screen pressure.On-chip VREF can be utilized for analog auxiliary input,

temperature measurement and battery monitoring withthe ability to measure voltage from 0V to 5V.

The XPT2046 also has an on-chip temperature sensor

The XPT2046 is available in 16pin QFN thin package(0.75mm in height) and has the operating temperature range of -40°C to +85°C

Features

12 bit SAR type A/D converter with S/H circuit

Low voltage operation (VCC = 2.2V ∼ 3.6V)

Low voltage digital I/F (1.5V ∼ VCC)

4-wire I/F

Sampling frequency: 125 kHz (max)

On-Chip voltage reference (2.5V)

Pen pressure measurement

On-chip thermo sensor

Direct battery masurement

Low power consumption (260μA)

Package 16pin QFN