QT115A-ISG Atmel, QT115A-ISG Datasheet - Page 61
QT115A-ISG
Manufacturer Part Number
QT115A-ISG
Description
IC TOUCH SENSOR PROX 8SOIC
Manufacturer
Atmel
Datasheet
1.AT42QT1040-MMH.pdf
(72 pages)
Specifications of QT115A-ISG
Input Type
*
Output Type
*
Interface
*
Current - Supply
*
Mounting Type
Surface Mount
Operating Supply Voltage
3 V to 5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SO-8
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Package / Case
-
Lead Free Status / Rohs Status
Details
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6.3.4.3
Touch Sensors Design Guide
Wheel
To form a wheel, the design is simply is wrapped around to form a circle, with the X segments becoming
wedge shaped (see
many Y “circles” as necessary to ensure a maximum gap of 4 mm between them.
Figure 6-5.
Center diameter depends on
the number of Y traces,
the spacing of Y traces,
the number of X electrodes, etc.
Note the maximum outer arc length
0.1–0.5 mm
Gap Between
X Electrodes
Two-layer Small Wheel: Multiple Y Traces (Spatially Interpolated)
Figure
1.5–4 mm
X5
X6
2–4 mm
6-5). Note that, as with the Y “stripes” in the slider design, there should be as
X4
Y, 0.1
–0.5
X7
mm Width
Mutual-capacitance One-dimensional Sensors
X0
Y should connect on layer
below X if possible
X3
X2
Outer Arc
<8 mm
X1
10620D–AT42–04/09
6-7
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