MAX97002 Datasheet, PDF (1/36 Pages) Maxim Integrated Products – Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifiers

19-5111; Rev 0; 1/10
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Audio Subsystem with Mono Class D
Speaker and Class H Headphone Amplifiers
General Description
The MAX97002 mono audio subsystem combines a
mono speaker amplifier with a stereo headphone ampli-
fier and an analog DPST switch. The headphone and
speaker amplifiers have independent volume control and
on/off control. The 4 inputs are configurable as 2 differ-
ential inputs or 4 single-ended inputs.
The entire subsystem is designed for maximum effi-
ciency. The high-efficiency, 700mW, Class D speaker
amplifier operates directly from the battery and con-
sumes no more than 1FA in shutdown mode. The Class
H headphone amplifier utilizes a dual-mode charge
pump to maximize efficiency while outputting a ground-
referenced signal that does not require output coupling
capacitors.
The speaker amplifier incorporates a distortion limiter to
automatically reduce the volume level when excessive
clipping occurs. This allows high gain for low-level sig-
nals without compromising the quality of large signals.
All control is performed using the 2-wire I²C interface.
The MAX97002 operates over the extended -40NC to
+85NC temperature range, and is available in the 2mm x
2.5mm, 20-bump, WLP package (0.5mm pitch).
Cell Phones
Portable Media Players
Applications
Features
S 2.7V to 5.5V Speaker Supply Voltage
S 1.6V to 2V Headphone Supply Voltage
S 700mW Speaker Output (VPVDD = 3.7V,
ZSPK = 8ω + 68µH)
S 37mW/Channel Headphone Output (RHP = 16I)
S Low-Emission Class D Amplifier
S Efficient Class H Headphone Amplifier
S Ground-Referenced Headphone Outputs
S 2 Stereo Single-Ended/Mono Differential Inputs
S Integrated Distortion Limiter (Speaker Outputs)
S Integrated DPST Analog Switch
S No Clicks and Pops
S TDMA Noise Free
S 2mm x 2.5mm, 20-Bump, 0.5mm Pitch WLP
Package
PART
MAX97002EWP+
Ordering Information
TEMP RANGE
-40NC to +85NC
PIN-PACKAGE
20 WLP
Simplified Block Diagram
1.8V BATTERY
POWER SUPPLY
STEREO/
MONO
INPUT
STEREO/
MONO
INPUT
I2C
CONTROL
MAX97002
LIMITER
VOLUME
VOLUME
CLASS H
AMPLIFIER
CHARGE
PUMP
CLASS D
AMPLIFIER
BYPASS
________________________________________________________________ Maxim Integrated Products   1
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.