MAX9796 Datasheet, PDF (1/27 Pages) Maxim Integrated Products – 2.3W, High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers

19-0866; Rev 0; 7/07
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
General Description
The MAX9796 combines a high-efficiency Class D, mono
audio power amplifier with a mono DirectDrive™ receiver
amplifier and a stereo DirectDrive headphone amplifier.
Maxim’s 3rd-generation, ultra-low EMI, Class D audio
power amplifiers provide Class AB performance with
Class D efficiency. The MAX9796 delivers 2.3W into a 4Ω
load from a 5V supply and offers efficiencies up to 80%.
Active emissions limiting circuitry and spread-spectrum
modulation greatly reduce EMI, eliminating the need for
output filtering found in traditional Class D devices.
The MAX9796 features a fully differential architecture, a
full-bridged output, and comprehensive click-and-pop
suppression. The device utilizes a flexible, user-defined
mixer architecture that includes an input mixer, volume
control, and output mixer. All controls are done through
an I²C interface.
The mono receiver amplifier and stereo headphone
amplifier use Maxim’s patented^† DirectDrive architecture,
that produces a ground-referenced output from a single
supply, eliminating the need for large DC-blocking
capacitors, saving cost, space, and component height.
The MAX9796 is available in a 36-bump UCSP™ (3mm
x 3mm) package and is specified over the extended
-40°C to +85°C temperature range.
†_{U.S. Patent # 7,061,327}
Cell Phones
Portable Multimedia Players
Handheld Gaming Consoles
Applications
Simplified Block Diagram
SINGLE SUPPLY 2.7V TO 5.5V
GAIN
CONTROL
I²C
INTERFACE
MIXER/
MUX
MAX9796
Features
o Unique Spread-Spectrum Modulation and Active
Emissions Limiting Significantly Reduces EMI
o Up to 3 Stereo Inputs
o 2.3W Mono Speaker Output (4Ω, V_DD = 5V)
o 50mW Mono Receiver/Stereo Headphone Outputs
(32Ω, V_DD = 3.3V)
o High PSRR (68dB at 217Hz)
o 80% Efficiency (V_DD = 3.3V, R_L = 8Ω, P_OUT =
600mW)
o I²C Control—Input Configuration, Volume
Control, Output Mode
o Click-and-Pop Suppression
o Low Total Harmonic Distortion (0.03% at 1kHz)
o Current-Limit and Thermal Protection
o Available in Space-Saving, 36-Bump UCSP
(3mm x 3mm)
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
MAX9796EBX+T -40°C to +85°C 36 UCSP-36*
+Denotes a lead-free package.
*Four center bumps depopulated.
PKG
CODE
B36-4
Pin Configuration
TOP VIEW
(BUMPS ON BOTTOM)
1
2
3
4
5
6
CPVDD
C1P CPGND C1N
CPVSS
HPL
A
PVDD
I.C.
VBIAS
INC1
VSS
HPR
B
OUT+
SDA
C
INC2 OUTRx
PGND
SCL
MAX9796
INB2
VDD
D
OUT- SHDN INA1
INA2
INB1
I.C.
E
PVDD
OUT- PGND OUT+
PVDD
GND
F
UCSP is a trademark of Maxim Integrated Products, Inc.
UCSP
________________________________________________________________ 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.