Leadis Technology, Inc., an analog and mixed-signal semiconductor developer of color display driver, power management ICs, LED drivers, and audio ICs for mobile consumer electronic devices, today announced sample availability of the LDS6010 and LDS6040, two new products in the company’s family of PureTouch™ low-power controllers designed for capacitive touch applications. The LDS6010/LDS6040 controllers’ haptics driver is a sophisticated block capable of delivering the crisp response required to achieve advanced tactile effects. The new devices are the world’s first capacitive touch controllers with an integrated haptics driver for use with mobile phone touch-input controls including sliders, scroll wheels, and buttons. Optimized with a low power touch operating voltage of 1.8V, the LDS6010 and LDS6040 consume less than 200uW in full power mode (haptics in shutdown), eliminating the need for low power modes and their associated first-touch latency artifacts. Both controllers feature 15 touch sensor inputs.

The LDS6010 is a programmable touch controller with integrated haptics driver for use with capacitive sensor arrays implementing touch-based input controls including sliders, scroll wheels, and buttons. The device operates with a 1.8V touch supply voltage and a haptics supply voltage range of 3V to 5V. Consuming less than 200uW of power in full power mode (haptics in shutdown), the LDS6010 enables extremely low power consumption in full power mode. Both SPI-compatible and I2C-compatible interfaces are supported with a general-purpose input/output (GPIO) and interrupt output for additional communication with the host processor. Touch sensor inputs are directed through an integrated switch matrix to a 16-bit 500 kHz sigmadelta CDC which senses changes in the external sensor array. Featuring 15 sensor inputs, the LDS6010 provides fast update rates of 2ms per sensor input with on-chip automatic calibration logic continuously monitoring the environment to adjust ambient baseline levels to increase touch accuracy. The LDS6010 is packaged in a 5mm x 5mm 40ld TQFN package with maximum thickness of 0.8mm.

The LDS6040 touch controller is a programmable touch controller with integrated haptics driver and keypad LED drivers for use with capacitive sensor arrays implementing touch-based input controls including sliders, scroll wheels, and buttons. The LDS6040 also incorporates LED drivers for integrated visual feedback, with up to eight of the 15 touch sensor inputs configurable as keypad LED drivers capable of driving up to 8mA each (16mA available by connecting a single LED to two driver outputs). The LDS6040’s haptics and LED drivers operate within a 3V to 5V supply range, with a programmable on-board voltage regulator enabling direct connection of the haptics supply to the system battery while still ensuring a consistent haptics experience across the battery discharge curve. The LDS6040 is offered with both SPI-compatible and I2C-compatible interfaces (active interface selected by I/F Toggle pin) and features a general-purpose input/output (GPIO) and interrupt output for additional communication with the host processor.

The new devices support both ERM (eccentric rotating mass) and LRA (linear resonant actuator) vibration motors, enabling flexibility in system design for deploying an advanced haptics platform. A smart watchdog timer monitors the PWM input and sets the haptics driver to shutdown mode to save power if no PWM activity is detected. An integrated over-temperature shutdown protection circuit disables the haptics functionality if the controller temperature exceeds 135C, providing protection against motor failure conditions that might otherwise result in excessive current conditions and system battery drainage. They’re optimized for minimal power consumption, with touch sensor circuits operating from a 1.8v supply voltage. In full power mode, sensor conversion and calibration occur continously, eliminating any latency between touch event and touch detection. With its ultra-low power consumption of <150uW (typical), the LDS6040 may be operated continously in full power mode, without the need for latency-ridden low power modes.

Related products

• Touch screen business phone bridges mobile work with mobile play
• BenQ C36 music phone
• Industry’s first memory cards for mobile phones