E240B QUANTUM ATMEL, E240B Datasheet - Page 14

• Manufacturer Part Number: E240B
• Description: QT240 4 Key Qtouch Evaluation Kit
• Manufacturer: QUANTUM ATMEL

Specifications of E240B

• Silicon Manufacturer: Atmel
• Application Sub Type: Touch Sensor
• Kit Application Type: Sensing - Touch / Proximity
• Silicon Core Number: QT240
• Kit Contents: Board And Literature
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Does Not
Work
Keys Not
Sensitive
Enough
Noisy or
Erratic
Operation
Power supply too low or connected backwards
Keys not calibrated properly
Cs values need to be adjusted higher (ie, if the panel is too thick etc)
Power supply problem
Noisy or unstable power supply
Supply voltage is too low
Cables or board too close to a strong noise source (ie, a power line or switcher)
E240 is not mechanically stable
Recalibrate or let stand for up to 30 seconds to let drift compensation work
on the references
TROUBLESHOOTER
Increase the distance from the noise source
Place a grounded shield between the noise source and the E240
Prevent board from moving around
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