MAX4409ETP+ Maxim Integrated Products, MAX4409ETP+ Datasheet

MAX4409ETP+

Manufacturer Part Number

MAX4409ETP+

Description

IC AMP AUDIO .08W STER AB 20TQFN

Manufacturer

Maxim Integrated Products

Series

DirectDrive™r

Type

Class ABr

Datasheet

1.MAX4409ETP.pdf (20 pages)

Specifications of MAX4409ETP+

Output Type

Headphones, 2-Channel (Stereo)

Max Output Power X Channels @ Load

80mW x 2 @ 16 Ohm

Voltage - Supply

1.8 V ~ 3.6 V

Features

Depop, Short-Circuit and Thermal Protection, Shutdown

Mounting Type

Surface Mount

Package / Case

20-TQFN Exposed Pad

Product

General Purpose Audio Amplifiers

Output Power

80 mW

Common Mode Rejection Ratio (min)

96 dB

Thd Plus Noise

0.002 %

Operating Supply Voltage

1.8 V to 3.6 V

Supply Current

5 mA

Maximum Power Dissipation

2051 mW

Maximum Operating Temperature

+ 85 C

Mounting Style

SMD/SMT

Input Bias Current (max)

0 nA

Input Offset Voltage

0.5 mV

Input Signal Type

Differential

Minimum Operating Temperature

- 40 C

Supply Voltage (max)

3.6 V

Supply Voltage (min)

1.8 V

Amplifier Class

No. Of Channels

Supply Voltage Range

1.8V To 3.6V

Load Impedance

16ohm

Operating Temperature Range

-40Â°C To +85Â°C

Amplifier Case Style

TQFN

Rohs Compliant

Yes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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The MAX4409 stereo headphone amplifier combines

Maxim’s DirectDrive

mode sense input, which allows the amplifier to reject

common-mode noise. Conventional headphone ampli-

fiers require a bulky DC-blocking capacitor between

the headphone and the amplifier. DirectDrive produces

a ground-referenced output from a single supply, elimi-

nating the need for large DC-blocking capacitors,

which saves cost, board space, and component height.

The common-mode voltage sensing corrects for any

difference between SGND of the amplifier and the

headphone return. This feature minimizes ground-loop

noise when the HP socket is used as a line out connec-

tion to other grounded equipment, for example, a PC

connected to a home hi-fi system.

The MAX4409 draws only 5mA of supply current, deliv-

ers up to 80mW per channel into a 16Ω load, and has a

low 0.002% THD+N. A high 86dB power-supply rejec-

tion ratio allows this device to operate from noisy digital

supplies without additional power-supply conditioning.

The MAX4409 includes ±8kV ESD protection on the

headphone outputs. Comprehensive click-and-pop cir-

cuitry eliminates audible clicks and pops on startup

and shutdown. A low-power shutdown mode reduces

supply current draw to only 6µA.

The MAX4409 operates from a single 1.8V to 3.6V sup-

ply, has short-circuit and thermal overload protection,

and is specified over the extended -40°C to +85°C tem-

perature range. The MAX4409 is available in a tiny 20-

pin thin QFN (4mm x 4mm x 0.8mm) package.

19-2842; Rev 3; 6/09

DirectDrive is a registered trademark of Maxim Integrated

Products, Inc.

Pin Configurations and Typical Application Circuit appear

at end of data sheet.

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

Notebooks

Desktop PCs

Cellular Phones

PDAs

MP3 Players

Tablet PCs

Portable Audio Equipment

________________________________________________________________ Maxim Integrated Products

80mW, DirectDrive, Stereo Headphone

General Description

architecture and a common-

Amplifier with Common-Mode Sense

Applications

♦ No Bulky DC-Blocking Capacitors Required

♦ Ground-Referenced Outputs Eliminate DC-Bias

♦ Common-Mode Voltage Sensing Eliminates

♦ 96dB CMRR

♦ No Degradation of Low-Frequency Response Due

♦ 80mW per Channel into 16Ω

♦ Low 0.002% THD+N

♦ High 86dB PSRR

♦ Integrated Click-and-Pop Suppression

♦ 1.8V to 3.6V Single-Supply Operation

♦ Low Quiescent Current

♦ Low-Power Shutdown Mode

♦ Short-Circuit and Thermal-Overload Protection

♦ ±8kV ESD-Protected Amplifier Outputs

♦ Available in a Space-Saving Package

*EP = Exposed pad.

MAX4409ETP

AUDIO

INPUT

RIGHT

INPUT

LEFT

Voltages on Headphone Ground Pin

Ground-Loop Noise

to Output Capacitors

PART

20-Pin Thin QFN (4mm x 4mm x 0.8mm)

SHDN

-40°C to +85°C

TEMP RANGE

MAX4409

Ordering Information

Functional Diagram

COM

DirectDrive OUTPUTS

ELIMINATE DC-BLOCKING

CAPACITORS

COMMON-MODE

SENSE INPUT ELIMINATES

GROUND-LOOP NOISE

20 Thin QFN-EP*

PIN-PACKAGE

Features

Related parts for MAX4409ETP+

MAX4409ETP+ Summary of contents

Page 1

... DirectDrive is a registered trademark of Maxim Integrated Products, Inc. Pin Configurations and Typical Application Circuit appear at end of data sheet. ________________________________________________________________ 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 ♦ No Bulky DC-Blocking Capacitors Required ♦ ...

Page 2

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense ABSOLUTE MAXIMUM RATINGS PGND to SGND .....................................................-0.3V to +0. ................................................................. .........................................................-0.3V to +0. and SV to PGND or SGND .........................-0.3V to ...

Page 3

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense ELECTRICAL CHARACTERISTICS (continued 3V PVDD SVDD PGND SGND T , unless otherwise noted. Typical values are at T MAX PARAMETER SYMBOL Total Harmonic Distortion THD+N ...

Page 4

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense ( 2.2µ 10kΩ, THD+N measurement bandwidth = 22Hz to 22kHz TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY ...

Page 5

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense ( 2.2µ 10kΩ, THD+N measurement bandwidth = 22Hz to 22kHz TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT ...

Page 6

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense ( 2.2µ 10kΩ, THD+N measurement bandwidth = 22Hz to 22kHz COMMON-MODE REJECTION RATIO vs. FREQUENCY 0 V ...

Page 7

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense ( 2.2µ 10kΩ, THD+N measurement bandwidth = 22Hz to 22kHz POWER DISSIPATION vs. OUTPUT POWER 400 INPUTS ...

Page 8

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense ( 2.2µ 10kΩ, THD+N measurement bandwidth = 22Hz to 22kHz SUPPLY CURRENT vs. SUPPLY VOLTAGE 10 8 ...

Page 9

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense Detailed Description The MAX4409 stereo headphone driver features Maxim’s patented DirectDrive architecture, eliminating the large output-coupling capacitors required by traditional single- supply headphone drivers. The device consists of two 80mW Class AB ...

Page 10

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense typically 0.5mV, which, when combined with a 32Ω load, results in less than 16µ current flow to the headphones. Previous attempts to eliminate the output-coupling capac- itors involved biasing the ...

Page 11

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense tops, as well as MP3, CD, and DVD players. By elimi- nating the DC-blocking capacitors through DirectDrive technology, these capacitor-related deficiencies are eliminated. The MAX4409 features a low-noise charge pump. The 320kHz ...

Page 12

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense driver. The negative supply voltage appears on the PV pin. A typical application is a negative supply to SS adjust the contrast of LCD modules. When considering the use ...

Page 13

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense Table 1. Suggested Capacitor Manufacturers SUPPLIER Taiyo Yuden TDK Note: Please indicate you are using the MAX4409 when contacting these component suppliers. Choose R according to the Gain-Setting Resistors sec- IN tion. ...

Page 14

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense Application Circuit). Place capacitors C2 and C3 as close to the device as possible. Route PGND and all traces that carry switching transients away from SGND and the traces and components in ...

Page 15

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense 1.8V to 3.6V C3 1μ C1P UVLO/ SHUTDOWN CONTROL CHARGE C1 PUMP 1μF 3 C1N PV SV PGND SGND ...

Page 16

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense 0.1μF AUX_IN MAX4060 BIAS 2.2kΩ 0.1μF IN+ IN- 0.1μF 16 ______________________________________________________________________________________ V DD 0.1μF 0.1μF 15kΩ 1μF 1μF OUT 0.1μF 15kΩ CODEC 1μF 10kΩ 1μF 10kΩ 1μF System Diagram 15kΩ INR OUTR+ ...

Page 17

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense TOP VIEW Chip Information TRANSISTOR COUNT: 4295 PROCESS: BiCMOS ______________________________________________________________________________________ C1P 1 15 INR PGND 2 14 SHDN CIN 3 13 INL MAX4409 4 12 N.C. N. OUTR ...

Page 18

DirectDrive, Stereo Headphone Amplifier with Common-Mode Sense For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a ...

Page 19

Page 20

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products ...

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