XPT2046 اورجینال

نقد و بررسی اجمالی

آی سی کنترلر تاچ اسکرین ،صفحه لمسی مقاومتی با نمونه گیری 125 کیو هرتز با مبدل داخلی 12 بیت Touch Screen Controller

 دریافت دیتا شیت

General Description

The XPT2046 is a 4-wire resistive touch screen controller that incorporates a 12-bit 125 kHz sampling SAR type A/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

Applications

 Personal digital assistants

 Portable instruments

Point -of-sale terminals

Pagers

Touch screen monitors

 Cellular phones