10-bit Touchscreen Sensor IC
Features
• QField™ Touchscreen:
– Up to 3.4 inches diagonal screen size supported
• Technology:
– Patented spread-spect...
Description
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)
QField™ 10-bit Touchscreen Sensor IC AT42QT4120
Summary
1. Pin-out and Pin Listing Descriptions
1.1 Device Pin-out
Y2B N/C SDA RST Y0A SCL Y1A Y2A 1 2 3 4 5 6 7 8
N/C CHANGE Vss Vdd Vss Vdd N/C N/C
32 31 30 29 28 27 26 25 24 23
AT42QT4120
22 21 20
Y1B Y0B A0 Vss Vdd Vdd Vdd N/C
Note: This is a summary document. A complete document is available under NDA. For more information contact www.atmel.com/touchscreen.
19 18 17 9 10 11 12 13 14 15 16 Vss X1 X0 SMP VREF X2 N/C X3
9506AS–AT42–10/08
1.2
Pin Listing Description
Pin Listing
Name N/C CHANGE V...
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