MAX4409ETP+ Maxim Integrated Products, MAX4409ETP+ Datasheet

IC AMP AUDIO .08W STER AB 20TQFN

MAX4409ETP+

Manufacturer Part Number
MAX4409ETP+
Description
IC AMP AUDIO .08W STER AB 20TQFN
Manufacturer
Maxim Integrated Products
Series
DirectDrive™r
Type
Class ABr
Datasheet

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
AB
No. Of Channels
2
Supply Voltage Range
1.8V To 3.6V
Load Impedance
16ohm
Operating Temperature Range
-40°C To +85°C
Amplifier Case Style
TQFN
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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
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
1

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

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 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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