LDS6126 datasheet, PDF - EEWORLD Datasheet

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LDS6126: DescriptionPureTouch Capacitance Touch IC Family with Integrated LED Drivers; File Size648KB，3 Pages; ManufacturerETC2

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PureTouch Capacitance Touch IC Family with Integrated LED Drivers

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semiconductor solutions

LDS6100/6120 Touch Family

PureTouch Capacitance Touch IC Family with Integrated LED Drivers

The IDT LDS6100/6120 family of PureTouch

controllers empower system designers to create

streamlined, attractive and reliable product designs with capacitive touch controls. Integrated LED drivers

allow visual feedback to be implemented when a touch occurs, without the need for host intervention.

Benefits

• Ease-of-use and flexible configurability

with optimized, state machine

architecture

• Longer battery life enabled with

ultra-low power consumption

• Low BOM cost and minimized solution

footprint using bare minimum of

external components

• Robust touch performance via

proprietary noise-filtering algorithms

• Customizable visual feedback effects

with integrated LED drivers (LDS6120)

Description

The LDS6100/6120 family of capacitance touch controllers from Integrated Device Technoogy

optimized for the implementation of touch-based input controls including sliders, scroll wheels and

buttons. A low power programmable capacitance-to-digital converter (CDC) supports up to 20 sensor

inputs, 10 of which may be configured as direct communication mode (DCM) outputs that emulate

mechanical buttons, enabling streamlined communication of touch events without the need to query the

serial interface bus.

When configured for capacitive sensing, the touch inputs are directed through an integrated switch matrix

to a sigma-delta CDC which senses changes in the external sensor array. When a change in capacitance

occurs above the user defined threshold, a touch event is recognized and the host processor is notified via

an interrupt pin or DCM output. On the LDS6120 products, a variety of built-in LED lighting effects may

be automatically initiated by a touch event with no processor intervention required.

On-chip calibration logic continuously monitors the environment and automatically adjusts touch

sensitivity to insure robust performance. Proprietary noise-filtering algorithms may also be activated to

prevent false sensor activation in noisy system environments. The LDS6100/6120 family is offered with

SPI-compatible, I

C-compatible and SMBus-compatible interfaces, selectable in real-time using the I/F

select pins. General-purpose input/output (GPIO) and interrupt outputs are also provided for additional

communication with the host processor.

Applications

• Mobile handsets and smartphones

• Personal media players (MP3/MP4)

• Gaming devices

• Remote controls

• Television, audio/video

• Set-top boxes, multi-function printers,

enterprise telephony

• White goods

• Industrial and medical devices

LDS6120

Switch

Matrix

Power-On

Reset Logic

Calibration

Engine

Sigma-Delta

CDC

C0/DCM10

C1/DCM 11

C9/DCM9

C10/LED0

C19/LED9

VDD2

VSS2

Calibration

RAM

RESETB

TEST

VDD1

VSS1

LDOEN

VDDIO

I/F_SEL0

I/F_SEL1

LED Driver

Current Sources

LED0-

LED9

Control and

Data Registers

LDO

Serial Interface and

Control Logic

SD0/

SDA

SDI/

SCLK/ CSB/

SCL

Interrupt and GPIO Logic

GPIO

INTB

Excitation

Source

SHIELD

Figure 1. LDS6120 block diagram

IDT

LDS6100-6120 PURETOUCH

CAPACITANCE TOUCH FAMILY FLYER

Ideal Solution for Portable and “Green” Applications

The LDS6100/6120 is optimized for ultra-low power consumption. In full power mode, sensor conversion

and calibration occur continuously, minimizing the time between touch event and touch detection. With its

ultra-low touch sensor current consumption of <70 μA (typical at 1.8V), the LDS6100 products may be

operated continuously in full power mode, eliminating the need for introduced latencies that can cause

noticeable delays and degrade the user experience. Where power consumption is of the utmost

importance, low power modes with configurable latencies may be utilized to further reduce current

below 25 μA (100ms sleep cycle).

The LDS6100/6120 family is optimized for a minimized solution footprint, with the functionality of multiple

components consolidated into a single device and a bare minimum of required external passive

components. A variety of package options are available including a 4mm x 4mm 28 lead TQFN package, a

5mm x 5mm 40 lead TQFN package (both with 0.75mm package thickness), or a 5.3mm x 10.2mm SSOP

package for applications requiring a wider lead pitch.

*For direct application of 1.8V voltage. For voltages higher than 1.8V, apply voltage to VDDIO and tie VDD1 to ground though C2.

Figure 2. LDS6120 application diagram (typical)

LDS 6100 / 6120 Features

Versatile, accurate CDC

Ultra-low touch sensor power

consumption

• Up to 20 capacitance sensor input channels

• Configurable hysteresis and debounce

• Full power operating mode (typical): <125 μW (VDD1=1.8V)

• Low power operating mode (typical): <50 μW (VDD1=1.8V,

100ms sleep cycle)

• Shutdown mode (typical): <1 μW (VDD1=1.8V)

• Auto environmental compensation

• Integrated noise immunity algorithms for high-EMI applications

• Strongest single touch / two touches

• Unrestricted (all) touches

• Location, scroll direction, and 2x interpolation supported natively

Integrated, automatic calibration

algorithms

Integrated touch preference modes

Built-in slider/scroll support

IDT

LDS6100-6120 PURETOUCH

CAPACITANCE TOUCH FAMILY FLYER

LDS6126 Related Products

	LDS6126	LDS6100	LDS6104	LDS6107	LDS6108	LDS6120	LDS6124	LDS6124NQGI8	LDS6128
Description	PureTouch Capacitance Touch IC Family with Integrated LED Drivers	PureTouch Capacitance Touch IC Family with Integrated LED Drivers	PureTouch Capacitance Touch IC Family with Integrated LED Drivers	PureTouch Capacitance Touch IC Family with Integrated LED Drivers	PureTouch Capacitance Touch IC Family with Integrated LED Drivers	PureTouch Capacitance Touch IC Family with Integrated LED Drivers	PureTouch Capacitance Touch IC Family with Integrated LED Drivers	PureTouch Capacitance Touch IC Family with Integrated LED Drivers	PureTouch Capacitance Touch IC Family with Integrated LED Drivers

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