AT42QT4120 Datasheet, PDF (1/6 Pages) ATMEL Corporation – Patented spread-spectrum charge-transfer (transverse mode)

Features
• QField^™ Touchscreen:
– Up to 3.4 inches diagonal screen size supported
• Technology:
– Patented spread-spectrum charge-transfer (transverse mode)
• Panel Materials:
– Plastic, glass, composites, painted surfaces (low particle density metallic paints
possible)
• Adjacent Metal:
– Compatible with grounded metal immediately next to sensing channels
• Panel Thickness:
– 1 to 2 mm glass, 0.5 to 1.5 mm plastic
• Interface:
– I²C-compatible slave mode, 100 kHz or 400 kHz
• Moisture Tolerance:
– Best in class
• Power:
– 1.8V to 5.5V (2.5V to 5.5V in high speed mode)
• Packages:
– 32-pin 5 x 5 mm MLF RoHS compliant
• Signal Processing:
– Self-calibration, auto drift compensation, noise filtering
• Applications:
– Mobile electronics, terminals, appliances
• Patents:
– QMatrix^™ (patented Charge-transfer method)
– QField (patented Charge-transfer method, patent-pending QField optimized for
one-layer sensor element designs)
1. Pin-out and Pin Listing Descriptions
1.1 Device Pin-out
QField^™ 10-bit
Touchscreen
Sensor IC
AT42QT4120
Summary
32 31 30 29 28 27 26 25
N/C 1
24 Y1B
CHANGE 2
23 Y0B
Vss 3
22 A0
Vdd
Vss
4
5
AT42QT4120
21
20
Vss
Vdd
Vdd 6
19 Vdd
N/C 7
18 Vdd
N/C 8
17 N/C
9 10 11 12 13 14 15 16
Note: This is a summary document. A
complete document is available under
NDA. For more information contact
www.atmel.com/touchscreen.
9506AS–AT42–10/08