Rainbow Electronics MAX9796 - Manual

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 I
2 C 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.
Applications
Cell Phones
Portable Multimedia Players
Handheld Gaming Consoles
Features
♦ Unique Spread-Spectrum Modulation and Active
Emissions Limiting Significantly Reduces EMI
♦ Up to 3 Stereo Inputs
♦ 2.3W Mono Speaker Output (4Ω, V
DD
= 5V)
♦ 50mW Mono Receiver/Stereo Headphone Outputs
(32Ω, V DD = 3.3V)
♦ High PSRR (68dB at 217Hz)
♦ 80% Efficiency (V
DD = 3.3V, R L = 8Ω, P OUT =
600mW)
♦ I 2 C Control—Input Configuration, Volume
Control, Output Mode
♦ Click-and-Pop Suppression
♦ Low Total Harmonic Distortion (0.03% at 1kHz)
♦ Current-Limit and Thermal Protection
♦ Available in Space-Saving, 36-Bump UCSP
(3mm x 3mm)
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
MAX9796
MIXER/
MUX
GAIN
CONTROL
I 2 C
INTERFACE
SINGLE SUPPLY 2.7V TO 5.5V
PART TEMP RANGE
PIN-
PACKAGE PKG
CODE
MAX9796EBX+T -40°C to +85°C 36 UCSP-36* B36-4
Simplified Block Diagram
MAX9796
C1P CPGND C1N CPV DD
1
A
B
C
D
2 3 4
OUT+ SDA
PGND SCL
UCSP
E
F
PV DD OUT- PGND OUT+
CPV SS HPL
I.C. VBIAS INC1 PV DD V SS HPR
5 6
INC2 OUTRx
INB2 V DD
PV DD GND
OUT- SHDN INA1 INA2 INB1 I.C.
TOP VIEW
(BUMPS ON BOTTOM)
Pin Configuration
19-0866; Rev 0; 7/07
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.
UCSP is a trademark of Maxim Integrated Products, Inc.
+ Denotes a lead-free package.
*Four center bumps depopulated.
†
U.S. Patent # 7,061,327