TouchNetix aXiom AX54A User Interface Chip

Main Features

• Ultra high SNR: >80dB.
• Supports up to 54 touch sensing channels.
• Flexible channel routing allows arbitrary touch sensor aspect ratios.
• Supports non-rectangular sensors.
• Concurrently supports 2D (xy), 1D (slider) and 0D (button) sensors .
• Touch sensing through very thick plastic lenses and/or air gaps.
• Supports non-uniform lens thickness.
• All touches reported at a frame rate of up to 250Hz1
• Glove support without switching modes.
• Water suppression and wet finger tracking.
• Low emissions, low drive amplitude, high immunity to conducted interference.
• Host connection using SPI or I2C slave with interrupt or LIN.
• 3V3 and 1V8 supply, no high voltage generators needed.
• Independent I/O voltage supporting 1.8V to 3.3V host signaling.
• Optional external synchronization with display drivers for highest SNR.

Description