LDS6003 IDT | Alldatasheet

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Technical content

PureTouch™ Capacitance Touch IC The LDS6003 PureTouch™ controller empowers system designers to create streamlined, attractive, and reliable product designs, enabling the replacement of mechanical controls with capacitive touch buttons, sliders, and scroll wheels.

Description

The LDS6003 is a programmable capacitance-to-digital converter (CDC) designed for use with capacitive sensor arrays implementing touch-based input controls including sliders, scroll wheels, and buttons. Featuring 6 sensor inputs, the LDS6003 provides the flexibility to implement multiple touch inputs using a single controller. The capacitive sensor inputs are directed through an integrated switch matrix to a 500 kHz sigma-delta CDC which senses changes in the external sensor array. When a sufficiently large change in capacitance occurs, a sensor activation is registered and the host processor is notified. On-chip calibration logic continuously monitors the environment and automatically adjusts on-and-off threshold levels to prevent false sensor activation. The LDS6003 is offered with both SPI-compatible and I C-compatible interfaces (active interface selected by I/F select pin) and features a general-purpose input/ output (GPIO) and interrupt output for additional communication with the host processor. VDD1 RESETB TEST VDDIO I/F SEL SHIELD VSS1 Switch Matrix Serial Interface and Control Logic Interrupt and GPIO Logic 500 kHz Excitation Source Calibration RAM Control and Data Registers LDS6003 Power-On Reset Logic Calibration Engine Sigma-Delta CDC INTBGPIOCSB/ SCLK/ SCL SDI/ SD0/ SDA Figure 1. LDS6003 block diagram

  • 500 kHz sigma-delta CDC
  • 6 capacitance sensor input channels
  • 2 ms update rate per active sensor Integrated, automatic calibration algorithms
  • Environmental compensation
  • On-chip RAM to store calibration data Integrated touch preference modes
  • Strongest single touch
  • Strongest two touches
  • Unrestricted (all) touches Ultra-low touch sensor power consumption*
  • Operating mode (typical): <150 uW (VDD1=1.8V)
  • Shutdown mode (typical): <1 uW (VDD1=1.8V) Flexible interface options
  • SPI-compatible serial I/F
  • I C-compatible serial I/F
  • Separate VDDIO level for serial interface
  • GPIO and Interrupt Output * excludes I/F and voltage dependent VDDIO current

Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners. Discover what IDT know-how can do for you. need for introduced latency periods that can cause noticeable delays and degrade the user experience. typical power consumption below 1 uW. Figure 2. LDS6003 application diagram

  • 28 pin 4mm x 4mm QFN, 0.8mm max height
  • 28 pin 5.3mm x 10.2mm SSOP, 1.83mm max height Power supply range:
  • Touch supply (VDD1): 1.65V - 1.95V
  • VDDIO=1.65V - 3.6V Applications:
  • Mobile handsets and smartphones
  • Personal music and media players (MP3/MP4)
  • Gaming devices
  • Remote controls
  • Television, audio/video
  • Set-top boxes
  • Multi-function printers
  • Enterprise telephony