1 lds6000 puretouch? capacitance touch ic the lds6000 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 15 sensor inputs, the lds6000 provides the ?exibility 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 suf?ciently large change in capacitance occurs, a sensor activiation is registered and the host processor is noti?ed. on-chip calibration logic continuously monitors the environment and auto - matically adjusts on-and-off threshold levels to prevent false sensor activa - tion. the lds6000 is offered with both spi-compatible and i 2 c-compatible inter - faces (active interface selected by i/f select pin) and features a general- purpose input/output (gpio) and interrupt output for additional communica - tion with the host processor. lds6000 features versatile, accurate capacitance- to-digital converter (cdc) ? 500khz sigma-delta cdc ? 15 capacitance sensor input channels ? 2ms update rate per active sensor integrated, automatic calibration algorithms ? environmental compensation ? on-chip ram to store calibration data integrated touch prefer - ence modes ? strongest single touch ? strongest two touches ? unrestricted (all) touches ultra-low touch sensor power consumption* ? operating mode (typical): <150uw (vdd1=1.8v) ? shutdown mode (typical): <1uw (vdd1=1.8v) flexible interface options ? spi-compatible serial i/f ? i 2 c-compatible serial i/f ? separate v ddio level for serial interface ? gpio and interrupt output product brief lds6000 * excludes i/f and voltage dependent v ddio current lds6000 block diagram sight sound touch
lds6000 5/09- rev 1.1 ? 2009 leadis technology, inc. all rights reserved. the leadis logo is a trademark of leadis technology, inc. other product names are registered trademarks of their respective companies. product speci?cations are subject to change at any time without notice. leadis assumes no responsibility for errors or omissions. leadis assumes no liability(including liability for damages) with respect to any use of or reliance on the information contained herein. flexible package options: ? 28 pin 4mm x 4mm qfn, 0.8mm max height ? 28 pin 5.3mm x 10.2mm ssop, 1.99mm max height power supply range: ? touch supply (vdd1): 1.65v - 1.95v ? v ddio =1.65v - 3.6v applications: ? mobile handsets and smartphones ? personal music and media players (mp3/mp4) ? gaming devices ? remote controls ? television, a/v ? set-top boxes ? multi-function printers ? enterprise telephony leadis technology, inc. 800 w. california avenue, suite 200 sunnyvale, california 94086 tel: +1.408.331.8600 fax: +1.408.331.8601 www.leadis.com the lds6000 is 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, minimizing the time between touch event and touch detection. with its ultra-low touch sensor power consumption of <150uw (typical), the lds6000 may be operated continously in full power mode, even when battery life is of premium importance. the low power architecture of leadis puretouch? solutions eliminates the need for introduced latency periods that can cause noticeable delays and degrade the user experience. when touch inputs are not required to be active, the lds6000 may be put into standby mode, reducing typical power consumption below 5uw. ideal solution for portable applications lds6000 application diagram
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