AT42QT1050-MMH Microchip

Atmel AT42QT1050 Five-channel QTouch Touch Sensor IC PRELIMINARY DATASHEET Features Configurations: Comms mode Number of Keys: 1 to 5 keys (or 1 to 4 keys plus a Guard Channel) Technology: Patented spread-spectrum QTouchADC charge-transfer Key Outline Sizes: 6 mm 6 mm or larger (panel thickness dependent) widely different sizes and shapes possible Layers Required: One Electrode Materials: Etched copper Silver Carbon Indium Tin Oxide (ITO) Panel Materials: Plastic Glass Composites Painted surfaces (low particle density metallic paints possible) Panel Thickness: Up to 10 mm glass (electrode size dependent) Up to 5 mm plastic (electrode size dependent) Key Sensitivity: 2 Individually settable using simple commands over I C interface Interface: 2 I C slave mode (400 kHz). Discrete detection outputs Signal Processing: Self-calibration Auto-drift compensation Noise filtering Adjacent Key Suppression (AKS ) up to three groups possible Moisture Tolerance: Increased moisture tolerance based on hardware design and firmware tuning Power Saving Low Power (LP) mode supports both Low Power and Deep Sleep modes Power: 1.8 V to 5.5 V Package: 12-ball WLCSP RoHS-compliant IC 20-pin VQFN RoHS-compliant IC 9707FXAT4201/141. Pinouts and Schematics 1.1 Pinout Configuration (WLCSP) A1 corner 6 5 4 3 2 1 A B C D Bottom view 1.2 Pinout Configuration (VQFN) 20 19 18 17 16 SCL KEY2 1 15 CHANGE 2 14 NC KEY1 3 QT1050 13 RESET 12 SDA KEY0 4 ADDR SEL 11 NC 5 6 7 8 9 10 AT42QT1050 PRELIMINARY DATASHEET 2 9707FXAT4201/14 NC NC NC NC VSS NC KEY3 VDD KEY4 NC