MAX9879 Maxim Integrated Products, MAX9879 Datasheet

MAX9879

Manufacturer Part Number

MAX9879

Description

Stereo Class D Audio Subsystem

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX9879.pdf (31 pages)

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The MAX9879 combines a high-efficiency stereo Class D

audio power amplifier with a stereo capacitor-less

DirectDrive

D amplifiers with active emissions limiting technology pro-

vide Class AB performance with Class D efficiency.

The Class D power amplifier delivers up to 715mW from

a 3.7V supply into an 8Ω load with 88% efficiency to

extend battery life. The filterless modulation scheme

combined with active emission limiting circuitry and

spread-spectrum modulation greatly reduces EMI while

eliminating the need for output filtering used in tradition-

al Class D devices.

The headphone amplifier delivers up to 58mW from a

3.7V supply into a 16Ω load. Maxim’s patented

DirectDrive architecture produces a ground-referenced

output from a single supply, eliminating the need for

large DC-blocking capacitors, saving cost, space and

component height.

The device utilizes a user-defined input architecture,

three preamplifier gain settings, an input mixer, volume

control, comprehensive click-and-pop suppression, and

ed Class D amplifier and utilizes an internal DPST switch

to allow an external amplifier to drive the speaker that is

connected at the outputs of the MAX9879.

The MAX9879 is available in a thermally efficient,

space-saving 30-bump UCSP™ package.

19-4436; Rev 0; 2/09

DirectDrive is a registered trademark of Maxim Integrated

Products, Inc.

UCSP is a trademark of Maxim Integrated Products, Inc.

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.

C control. A bypass mode feature disables the integrat-

Cell Phones

PREAMPLIFIER

INTERFACE

headphone amplifier. Maxim’s filterless class

MAX9879

Simplified Block Diagram

________________________________________________________________ Maxim Integrated Products

MIXER

SINGLE SUPPLY

2.7V TO 5.5V

General Description

Portable Multimedia Players

CONTROL

VOLUME

BYPASS

with DirectDrive Headphone Amplifier

Applications

Stereo Class D Audio Subsystem

♦ Better than 9dB Margin Under EN 55022 Class B

♦ Low RF Susceptibility Design Rejects TDMA

♦ Input Mixer with User Defined Input Mode

♦ Stereo 715mW Speaker Output (R

♦ Stereo 58mW Headphone Output (16Ω,

♦ Low 0.04% THD+N at 1kHz (Class D Power

♦ Low 0.018% THD+N at 1kHz (Headphone

♦ 88% Efficiency (R

♦ 1.6Ω Analog Switch for Speaker Amplifier Bypass

♦ High Speaker Amplifier PSRR (72dB at 217Hz)

♦ High Headphone Amplifier PSRR (84dB at 217Hz)

♦ I

♦ Hardware and Software Shutdown Mode

♦ Ultra-Low Click and Pop

♦ Robust Design with Current and Thermal

♦ Available in Space-Saving Package

+ Denotes a lead(Pb)-free/RoHS-compliant package.

(BUMP SIDE DOWN)

MAX9879ERV+

Limits with No Filter Components

Noise from GSM Radios

Amplifier)

Protection

TOP VIEW

C Control

5x6 UCSP (2.5mm x 3mm)

= 3.7V)

PART

C1P

C1N

HPL

HPR

OUTL-

RXIN-

GND

BIAS

Ordering Information

-40°C to +85°C

TEMP RANGE

= 8Ω, P

PVDDL

PGNDL

GND

INB1

INB2

Pin Configuration

OUTL+

OUT

RXIN+

GND

INA1

INA2

= 750mW)

PGNDR

SHDN

GND

SCL

= 8Ω,

PIN - PA C K A G E

30 UCSP (5x6)

Features

OUTR-

PVDDR

OUTR+

SDA

CCIO

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