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XPT7603 Datasheet(PDF) 24 Page - List of Unclassifed Manufacturers

Part No. XPT7603
Description  4-wire resistive touch screen controller
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Maker  ETC2 [List of Unclassifed Manufacturers]
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 24 page
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In particular, in the use of resistive touch screen to touch screen and pay attention to the connection between
XPT7603. Resistive touch screen because the resistance is relatively small, so XPT7603 between the screen
and try to connect to a short connection to the resistance as small as possible. Long connection will bring
more of the error, which, as the on-resistance switch. In addition, the welding point of relaxation, as well as a
solid point of contact will not bring the error to the application.
In addition to talking in front of the other applications in the touch screen (for example, applications using the
LCD panel backlight) cause of noise is also an important reason for the error. EMI noise coupled through the
LCD panel to the touch screen panel, causing instability in output, there are "glitches", and so can not be
calibrated. Minimize these errors, there are several possible ways: increase in touch screen at the bottom of a
metal shield, shield to ground; in the YP, YN, XP and XN-pin, respectively, to take on the filter capacitor; ... ...
but it must be noted These settings will be touch screen response time impact, especially in single-ended
mode at the same time data transmission and relatively high speed applications.
12 Physical Size of Chip Package
12.1 MSOP-10 Package




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