MAX11855

Multitouch, TacTouch, Capacitive Touch-Screen Controllers

Capacitive Touch-Screen Controllers Allow 4-Finger Tracking with No Ghosting

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Part Details

  • Superior Analog Front-End Provides High SNR (250:1)
  • Supports 1.5 and 2-Layer Capacitance Touch Screens and Capacitive Buttons
    • Two Touches, No Ghosting (MAX11856)
    • Four Touches, No Ghosting (MAX11855)
  • Touch-Screen Support (16:9 Aspect Ratios)
    • 4.3in. with 5mm Grid Spacing (31 Sensors)
    • 3.2in. with 5mm Grid Spacing (25 Sensors)
  • Arbitrary Channel Assignment for Touch Screens and Buttons
  • Scan Disable Input (Active-Low SDIS) Allows High-Frequency Noise Rejection
  • Performs Self-Calibration, Automatic Drift Compensation
  • Configurable Interrupt Output
  • User-Programmable Modes
    • Scan Rate, Sample Time, Number of Samples
    • Adjustable Low-Power Mode Response Time
  • TacTouch—Trigger to Haptic Controllers (Active-Low TRIG)
    • MAX11835 Haptic Actuator Controller
  • Integrated Memory
    • Flash-Based Upgradeable Firmware and Parameter Storage
  • Comprehensive Post-Processing
    • Data Output Format: X, Y, Z (Pressure Metric)
    • User-Defined Touch-Detect Thresholds
    • Region Dependent Haptics Generation
  • Automatic Power-Down Capable
  • Low-Power Operation
    • 3.8mW FPS (typ)
  • 400kHz I²C (Fast Mode, No Clock Stretching)
  • ±4kV HBM ESD Protection
MAX11855
Multitouch, TacTouch, Capacitive Touch-Screen Controllers
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