fma1125dc Fujitsu Microelectronics, Inc., fma1125dc Datasheet

fma1125dc

Manufacturer Part Number

fma1125dc

Description

Touch Sensor Controller

Manufacturer

Fujitsu Microelectronics, Inc.

Datasheet

1.FMA1125DC.pdf (30 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

fma1125dc-24S

Manufacturer:

FUJI

Quantity:

20 000

Current page: 1 of 30
Download datasheet (3Mb)

The FMA1125DC is a low-power, compact, flexible touch sensor

controller that converts capacitance generated between the

human body and a conductive touch pad to digital data without

any analog signal processing.

Its programmability provides design flexibility, high performance

and stability for a broad range of applications. The

FMA1125DC’s AIC™ (Automatic Impedance Calibration)

function can be easily configured to support different sensitivities

for individual channels independently as well as to change values

of parameters such as the calibration interval. AIC

temporarily paused and resumed by a host MCU.

Among the many features of the FMA1125DC is APIS™

(Adjacent Pattern Interference Suppression). APIS is a filtering

function that eliminates adjacent key or pattern interference. The

FMA1125DC also gives touch-strength output in addition to

touch on/off output. There are a number of DIOs depending on

the package type that can be configured and programmed to meet

specific requirements, giving customers greater flexibility and

value.

The FMA1125DC comes with various package types to support

different numbers of input channels and DIOs.

• Patented fully digital architecture

• Extremely low power consumption (100μA in active mode)

• Supports 8 input channels (24QFN, 24SSOP, 24SOP)

• Programmable registers to characterize applications

• I

• Configurable Touch Input Channels as extended DIOs

• 6-bit resolution of LED dimming control via DIO pins

• Configurable AIC™ (Automatic Impedance Calibration)

• Two types of interrupts (GINT for general purpose and TINT

or 6 input channels (16QFN,16SOP)

for touch detection)

Overview

Features

C interface with the host MCU

FMA1125DC

Touch Sensor Controller

may also be

Confidential

Applications

• 8-bit resolution of touch strength data (256 steps)

• Three different modes for APIS™ (Adjacent Pattern

• Configurable DIO pins as direct touch outputs, extended

• Idle and Sleep modes for power saving

• De-bounced touch outputs

• Portable devices such as PDAs, cellular phones, MP3 players,

• Home appliances and consumer electronic products

• Computer input devices such as mice and keyboards

The FMA1125DC touch sensor controller is developed and

owned by ATLab Inc., South Korea, and is distributed by

Fujitsu Microelectronics America, Inc.

Interference Suppression)

GPIOs or external interrupt inputs

remote controllers, and other integrated input devices

Touch Pad System Model

Zref

Zin

Zref

Zin

Touch Pad

Impedance

Detection

Zin < Zref

Change

Impedance Status

Zin

Zref

Impedance Status

Zin

Zref

Ztouch

Touch

Detected

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