AK4186 Datasheet, PDF (26/33 Pages) Asahi Kasei Microsystems – Low Power Touch Screen Controller with I2C Interface

[AK4186]
SYSTEM DESIGN
Figure 35, Figure 36, Figure 37, Figure 38 shows the system connection diagram for the AK4186. The evaluation board
[AKD4186] demonstrates the optimum layout, power supply arrangements and measurement results.
AK4186ECB <4-wire Touch Screen Input>
4-wire
Touch Screen
Analog Ground
Digital Ground
0.001µ *
0.001µ *
0.001µ *
0.001µ *
Analog Supply
1.6∼3.6V_10µ +
0.1µ
XP
YP
XN
YN
Top View
VDD
CAD 0
TEST
IN
PENIRQN SDA
VSS
SCL
Auxiliary
Analog Input
“L” or “H”
Rp
Rp
µP
Figure 35. Typical Connection Diagram (4-wire, AK4186ECB)
Notes:
- VSS of the AK4186 should be distributed separately from the ground of external controllers.
- All digital input pins (SCL, SDA, CAD0 pins) must not be left floating.
MS1068-E-04
- 26 -
2011/03