APT7843
Touch Screen Controller
Description
The APT7843 Touch Screen Controller IC provides all
the screen drive , A/D converter and control circuits
to easily interface to 4 wire resistive touch screen.
The IC continually monitors the screen waiting for a
touch. When the screen touched , the IC performs
A/D converter to determine the location of touch.
Also , this device has 2 auxiliary input to A/D con-
verter , allowing for the measurement of other inputs
such as battery voltage.
Features
•
•
•
•
•
•
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16 pin SSOP or TSSOP
Operates with four wire touch screen
8-bit or 12 bit A/D converter
Ratiometric Conversion eliminates screen
calibration
2 auxiliary analog inputs
4 wire serial interface
Full power down control
Applications
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•
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PDAs
Handheld computer
Touch-screen kiosks
Pin Assignment
+Vcc
X+
Y+
X-
Y-
GND
IN3
IN4
1
2
3
4
5
6
7
8
16
15
14
13
12
DCLK
CS
DIN
BUSY
DOUT
11 PENIRQ
10
9
+Vcc
V
REF
Order Information
APT7843
Temp. Range
Package Code
Package Code
N : SSOP
Temp. Range
I : - 40 to 85
°
C
O : TSSOP
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Copyright
ANPEC Electronics Corp.
Rev. A.8 - Apr., 2002
1
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
