QTouch 11-key Sensor - ATMEL Corporation
Description
Features
• Sensor Keys: – Up to 11 QTouch™ channels
• Data Acquistion: – Measurement of keys triggered either by a signal applied to the SYNC pin or at regular intervals timed by the AT42QT1110's internal clock – Keys measured sequentially for better performance, or in parallel groups for faster operation – Raw data for key touches can be read as a report over the SPI interface
• Discrete Outputs: – Configurable “Detect” outputs indicating individual key touch (7-key mode)
• Device Setup: – Device configuration can be stored in EEPROM
• Technology: – Patented spread-spectrum charge-transfer (direct mode)
• Key Outline Sizes: – 6 mm x 6 mm or larger (panel thickness dependent); widely different sizes and shapes possible, including solid or ring shapes
• Key Spacings: – 7 mm center to center or more (panel thickness dependent)
• Layers Required: – One
• Electrode Materials: – Etched copper, silver, carbon, Indium Tin Oxide (ITO)
• Electrode Substrates: – PCB, FPCB, plastic films, glass
• Panel Materials: – Plastic, glass, composites, painted surfaces (low particle density metallic paints possible)
• Panel Thickness: – Up to 10 mm glass, 5 mm plastic (electrode size dependent)
• Key Sensitivity: – Individually settable via simple commands over serial interface
• Adjacent Key Suppression® (AKS™) – Patented AKS technology to enable accurate key detection
• Interface: – Full-duplex SPI slave mode (750 KHz), “change” pin, discrete detection outputs
• Moisture Tolerance Good • Power:
– 1.
8V ~ 5.
5V • Package:
– 32-pin 5 x 5 mm MLF RoHS compliant – 32-pin 7 x 7 mm TQFP RoHS compliant • Signal Processing: – Self-calibration, auto drift compensation, noise filtering, AKS technology • Applications: – Consumer and industrial applications, such as TV, media player, etc
QTouch™ 11-key Sensor IC
AT42QT1111-MU AT42QT1111-AU
9571A–AT42–02/10
1.
Pinout and Schematic
1.
1 Pinout Configuration
SNS8K/DETECT3 SNS9/DETECT4
SNS9K/DETECT5 CHANGE RESET
SNS10/DETECT6 SNS10K/SYNC SNS0
SNS0K ...
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