QT60168C-ASG Atmel, QT60168C-ASG Datasheet - Page 64
QT60168C-ASG
Manufacturer Part Number
QT60168C-ASG
Description
IC TOUCH SENSOR 16KEY 32TQFP
Manufacturer
Atmel
Series
QMatrix™, QProx™r
Type
Capacitiver
Specifications of QT60168C-ASG
Number Of Inputs/keys
16 Key
Resolution (bits)
9, 11 b
Data Interface
Serial, SPI™
Voltage - Supply
3 V ~ 5 V
Current - Supply
25mA
Operating Temperature
-40°C ~ 105°C
Mounting Type
Surface Mount
Package / Case
32-TQFP, 32-VQFP
Output Type
*
Interface
*
Input Type
*
For Use With
427-1087 - BOARD EVAL QT60248-AS QMATRIX
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
QT60168C-ASG
Manufacturer:
Atmel
Quantity:
5 323
10620D–AT42–04/09
Mutual-capacitance One-dimensional Sensors
6.4
6.4.1
6.4.2
6-10
Typical Resistively Interpolated Method
Introduction
One-Layer Medium/Large Slider Or Wheel
This method uses an array of key segments connected by resistors. The advantage of this method is
that each key (or channel) in the sensor is formed by one or more segments. This makes it possible to
construct larger sliders and wheels than would be possible with the spatially interpolated method
described in
The basic design is the same as that shown in
page
resistive dividers on the X lines.
Figure 6-8.
Figure 6-9.
Smallest inner diameter is
determined by the point at
which the X fingers taper
to minimum width. For larger
inner diameters, set diameter
to desired size and taper
X fingers to suit.
Extra Resistive Segment(s) For X Electrode
6-2. However, to increase the length or diameter of the sensor, extra segments are created using
Xn-1
Section 6.3 on page
One-layer Medium/Large Slider (Resistively Interpolated)
One-layer Medium/Large Wheel (Resistively Interpolated)
Rtotal typically 100 kW
For X Electrode
Extra Resistive
6-2.
Segment(s)
Xn-2
X0
X1
Section 6.3.2 “One-Layer Small Slider Or Wheel” on
Rtotal 2 k to 10
W
X0
kW
Touch Sensors Design Guide
For design rules, see
Figure 6-1 on page 6-2
For design rules, see
Figure 6-2 on page 6-4