HR2046(XPT2046) Touch Screen Controller
General Description
The HR2046(XPT2046) is a 4-wire resistive touch screen controller that incorporates a 12-bit 125 kHz sampling SAR type
A/D converter.
The HR2046(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 HR2046(XPT2046) can detect the pressed screen location by performing two A/D conversions. In addition to location,
the HR2046(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 HR2046(XPT2046) also has an on-chip temperature sensor
The HR2046(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 TSSOP
Applications
Personal digital assistants
Portable instruments
Point -of-sale terminals
Pagers
Touch screen monitors
Cellular phones