Datasheet > MAX14628

MAX14628

更新时间： 2024-03-03 10:11:38

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	2236K
描述
SEND/END按键支持低功耗耳机检测

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MAX14628 数据手册

19-6310; Rev 0; 5/12

E V A L U A T I O N K I T A V A I L A B L E

MAX14627/MAX14628

Low-Power Headset Detectors with

SEND/END Button Support

General Description

Benefits and Features

The MAX14627/MAX14628 provide a simple solution for

detecting the insertion and managing the operation of a

3.5mm stereo headset with a microphone. These devices

integrate all circuitry needed to detect SEND/END button

press events and generate required microphone bias volt-

ages, and are fully compatible with Windows Mobile 7.

The devices need only three GPIOs from the host control-

ler to select between call mode and standby mode, and

monitor the SEND/END and jack insertion status. In call

mode, the low-noise LDO is enabled to provide DC bias to

the externally preamplified microphone. In standby mode,

microphone low-power pulsing is enabled to reduce sup-

ply current while waiting for a SEND/END button press

event. Two open-drain outputs signal the host controller

when an insertion/removal or SEND/END button press

event occurs. If a 3P headset without a microphone is

inserted, the low-power pulsing can be disabled by setting

the MODE input to high impedance.

The MAX14627 operates from a 2.5V to 5.5V input voltage

supply and features an internal 2.2V LDO output, while the

MAX14628 operates from a 3.1V to 5.5V voltage supply

and features an internal 2.8V LDO output voltage. Both

devices control jack insertion detection by monitoring a

3.5mm socket with a normally open jack insertion switch.

Additionally, the MAX14628 features open microphone

detection.

S Versatile Jack Detection and Control

 MODE Three-State Microphone Bias Control

 MIC Switch Ground Detection (MAX14627)

 MIC Switch Open and Ground Detection

(MAX14628)

S Compatible with Windows Mobile 7 and Google

Android

 Microphone Button Press Detection

S High-Performance MIC Bias and Power Savings

 No Pop-Up Noises

 Ultra-Low Noise, High-PSRR MIC Bias

 Low-Power MIC Idle Mode

 Automatic Ultra-Low-Power Mode When

Microphone Is Disabled

S PCB Space and Cost Savings

 Integrated 1ꢀkV ESD Protection (HBM) on

DETIN and MIC Input Terminals

 Small 8-Pin (2mm x 2mm) TDFN Package

Applications

Cell Phones

Portable Media Players

Tablet/Laptop PCs

Ordering Information appears at end of data sheet.

For related parts and recommended products to use with this part,

refer to www.maxim-ic.com/MAX14627.related.

Windows Mobile is a registered trademark of Microsoft Corporation.

The MAX14627/MAX14628 are available in an 8-pin TDFN

package, and are fully specified over the -40NC to +85NC

extended temperature range.

Typical Operating Circuits

Typical Operating Circuits continued

at end of data sheet.

MIC

AUDIO DIRECT

DRIVE

1µF

MODE

SWD

CAP

RES

1µF

1MI

MAX14628

2.2kI

PROCESSOR

MIC

LEFT

DET

MIC

MICROPHONE

SEND/

END

DET

DETIN

RIGHT

GND

EP/GND

�� Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...16

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与MAX14628相关器件

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MAX14628ETA+T	MAXIM	获取价格	Low-Power Headset Detectors with SEND/END Button Support
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MAX14630EZK+	MAXIM	获取价格	Power Management Circuit, BICMOS, PDSO5,
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MAX14632	ADI	获取价格	USB充电器适配器仿真器
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