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參數(shù)資料
| 型號： | LST4046QOTD |
| 廠商： | LITE-ON SEMICONDUCTOR CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, QCC16 |
| 封裝： | 4 X 4 MM, QFN-16 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 194K |
| 代理商： | LST4046QOTD |
Liteon Semiconductor Corporation
LST4046
R-type Touch Screen Controller
Rev1.0
1/8
FEATURES
2.7V to 5.5V operation
1.5V to 5.5V digital I/O
Internal 2.5V reference
Touch pressure measurement
Automatic screen touch detection
Auto power down
Available TSSOP-16, QFN4*4-16 packages
SPI compatible serial interface
APPLICATIONS
Touch screen monitors
Cellular phones
MP3 players
Point-of-sale terminals
Personal digital assistants
Smart hand-hold devices
GENERAL DESCRIPTION
LST4046 is a low power, low cost touch screen controller
which is applicable for 4-wire R-type touch screen. It
equipped with a 12bit analog-to-digital converter and is
highly compatible with most of the existing solutions. It
supports low voltage digital I/O interface from 1.5V to
5.5V which can be different from the 2.7V to 5.5V analog
power supply. The LST4046 also provide internal 2.5V
reference that can be used for two auxiliary inputs in
single-end measurement mode. The internal reference
can be powered down for low power operation.
The power consumption of LST4046 is less than 600uW
at 2.7V operation with highest 125KHz throughput rate.
The standby current can be as low as 1uA in power down
mode. It is available in TSSOP-16 and QFN4*4-16
packages and is specified in -20C to 85 C temperature
range.
FUNCTIONAL BLOCK DIAGRAM
X+
X-
Y+
Y-
AUX1
AUX2
PENIRQ
CS
DCLK
BUSY
DIN
DOUT
DVDD
AVDD
VREF
Switch
array
5x1
MUX
12bit
SAR ADC
Int.
Vref
REF
+/-REF
Register &
state
controller
Serial
I/O
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