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MAX4409

Description
0.08 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC20
Categorysemiconductor    Other integrated circuit (IC)   
File Size426KB,19 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Parametric View All

MAX4409 Overview

0.08 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC20

MAX4409 Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals20
Maximum operating temperature85 Cel
Minimum operating temperature-40 Cel
Maximum supply/operating voltage3.6 V
Minimum supply/operating voltage1.8 V
Rated bandwidth22 kHz
Rated output power0.0800 dBm
Processing package description4 × 4 MM, 0.80 MM HEIGHT, MO-220WGGD-1, TQFN-20
stateACTIVE
CraftsmanshipBICMOS
packaging shapeSQUARE
Package SizeChip CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
surface mountYes
Terminal formNO
Terminal spacing0.5000 mm
terminal coatingtin lead
Terminal locationFour
Packaging MaterialsUNSPECIFIED
Temperature levelINDUSTRIAL
Consumer IC Typeaudio amplifier
Number of channels2
19-2842; Rev 1; 6/04
80mW, DirectDrive, Stereo Headphone
Amplifier with Common-Mode Sense
General Description
The MAX4409 stereo headphone amplifier combines
Maxim’s DirectDrive architecture and a common-mode
sense input, which allows the amplifier to reject com-
mon-mode noise. Conventional headphone amplifiers
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 tiny 20-pin
thin QFN (4mm x 4mm x 0.8mm) and 14-pin TSSOP
packages.
Features
No Bulky DC-Blocking Capacitors Required
Ground-Referenced Outputs Eliminate DC-Bias
Voltages on Headphone Ground Pin
Common-Mode Voltage Sensing Eliminates
Ground-Loop Noise
96dB CMRR
No Degradation of Low-Frequency Response Due
to Output Capacitors
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 Space-Saving Packages
14-Pin TSSOP
20-Pin Thin QFN (4mm x 4mm x 0.8mm)
MAX4409
Ordering Information
PART
MAX4409ETP
MAX4409EUD
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 Thin QFN-EP*
14 TSSOP
*EP
= Exposed paddle.
Applications
Notebooks
Desktop PCs
Cellular Phones
PDAs
MP3 Players
Tablet PCs
Portable Audio Equipment
SHDN
LEFT
AUDIO
INPUT
Functional Diagram
MAX4409
DirectDrive OUTPUTS
ELIMINATE DC-BLOCKING
CAPACITORS
COM
RIGHT
AUDIO
INPUT
COMMON-MODE
SENSE INPUT ELIMINATES
GROUND-LOOP NOISE
Pin Configurations and Typical Application Circuit appear
at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
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