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