Datasheet > LDS6128

LDS6128

更新时间： 2024-02-22 19:48:50

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PureTouch Capacitance Touch IC Family with Integrated LED Drivers

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LDS6128 数据手册

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.

Description

Beneﬁts

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

• Ease-of-use and ﬂexible conﬁgurability

with optimized, state machine

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

architecture

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

• Longer battery life enabled with

ultra-low power consumption

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

serial interface bus.

• Low BOM cost and minimized solution

footprint using bare minimum of

external components

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.

• Robust touch performance via

proprietary noise-ﬁltering algorithms

• Customizable visual feedback effects

with integrated LED drivers (LDS6120)

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, I²C-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

C0/DCM10

C1/DCM 11

• Remote controls

LDS6120

• Television, audio/video

Power-On

Reset Logic

Calibration

Engine

Sigma-Delta

CDC

C9/DCM9

C10/LED0

• Set-top boxes, multi-function printers,

enterprise telephony

C19/LED9

• White goods

LED0-

LED9

LED Driver

Current Sources

• Industrial and medical devices

Calibration

RAM

VDD2

VSS2

RESETB

TEST

Control and

Data Registers

VDD1

VSS1

LDO

LDOEN

VDDIO

I/F_SEL0

I/F_SEL1

Serial Interface and

Control Logic

Excitation

Source

SHIELD

Interrupt and GPIO Logic

SD0/ SDI/ SCLK/ CSB/

GPIO

INTB

SDA

SCL

Figure 1. LDS6120 block diagram

IDT^®LDS6100-6120 PURETOUCH^®CAPACITANCE TOUCH FAMILY FLYER

12 3

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