MAX9760 Datasheet, PDF (1/31 Pages) Maxim Integrated Products – Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux

19-2744; Rev 0; 1/03
Stereo 3W Audio Power Amplifiers with
Headphone Drive and Input Mux
General Description
The MAX9760–MAX9763 family combines a stereo or
mono 3W bridge-tied load (BTL) audio power amplifier,
stereo single-ended headphone amplifier, headphone
sensing, and a 2:1 input multiplexer all in a tiny 28-pin
thin QFN package. These devices operate from a sin-
gle 4.5V to 5.5V supply and feature an industry-leading
100dB PSRR, allowing these devices to operate from
noisy supplies without the addition of a linear regulator.
An ultra-low 0.002% THD+N ensures clean, low-distor-
tion amplification of the audio signal. Patented click-
and-pop suppression eliminates audible transients on
power and shutdown cycles. Power-saving features
include low 4mV V_OS (minimizes DC current drain
through the speakers), low 13mA supply current, and a
10µA shutdown mode. A MUTE function allows the out-
puts to be quickly enabled or disabled.
A headphone sense input detects the presence of a
headphone jack and automatically configures the
amplifiers for either speaker or headphone mode. In
speaker mode, the amplifiers can deliver up to 3W of
continuous average power into a 3Ω load. In head-
phone mode, the amplifier can deliver up to 200mW of
continuous average power into a 16Ω load. The gain of
the amplifiers is externally set, allowing maximum flexi-
bility in optimizing output levels for a given load. The
amplifiers also feature a 2:1 input multiplexer, allowing
multiple audio sources to be selected. The multiplexer
can also be used to compensate for limitations in the
frequency response of the loud speakers by selecting
an external equalizer network. The various functions are
controlled by either an I²C-compatible or simple parallel
control interface.
The MAX9760–MAX9763 are available in either a ther-
mally efficient 28-pin thin QFN package (5mm ✕ 5mm ✕
0.8mm) or a TSSOP-EP package. All devices have ther-
mal overload protection (OVP) and are specified over
the extended -40°C to +85°C temperature range.
Applications
Notebooks
Portable DVD Players
Tablet PCs
PC Audio Peripherals
Camcorders
Pin Configurations and Functional Diagrams appear at end
of data sheet.
Features
o Industry-Leading, Ultra-High 100dB PSRR
o PC99/01 Compliant
o 3W BTL Stereo Speaker Amplifier
o 200mW Stereo Headphone Amplifier
o Low 0.002% THD+N
o Patented Click-and-Pop Suppression
o ESD-Protected Outputs
o Low Quiescent Current: 13mA
o Low-Power Shutdown Mode: 10µA
o MUTE Function
o Headphone Sense Input
o Stereo 2:1 Input Multiplexer
o Optional 2-Wire, I²C-Compatible or Parallel
Interface
o Tiny 28-Pin Thin QFN (5mm ✕ 5mm ✕ 0.8mm) and
TSSOP-EP Packages
Ordering Information
PART
TEMP RANGE
MAX9760ETI
-40°C to +85°C
MAX9760EUI
-40°C to +85°C
*EP = Exposed paddle.
PIN-PACKAGE
28 Thin QFN-EP*
28 TSSOP-EP*
Ordering Information continued at end of data sheet.
Simplified Block Diagram
SINGLE SUPPLY
4.5V TO 5.5V
LEFT IN1
LEFT IN2
RIGHT IN1
RIGHT IN2
CONTROL
SE/
BTL
I²C-
COMPATIBLE
MAX9760
________________________________________________________________ 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.