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MAX9796EBX+TG45

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28
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 DirectDrive architecture, that pro-
duces 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
234
OUT+
SDA
PGND SCL
UCSP
E
F
PV
DD
OUT- PGND OUT+
CPV
SS
HPL
I.C. VBIAS
INC1
PV
DD
V
SS
HPR
56
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 1; 1/08
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.
EVALUATION KIT
AVAILABLE
UCSP is a trademark of Maxim Integrated Products, Inc.
+
Denotes a lead-free package.
*Four center bumps depopulated.
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= PV
DD
= CPV
DD
= 3.3V, GND = PGND = CPGND = 0V, SHDN = V
DD
, I
2
C settings (INA gain = +20dB, INB gain = INC gain =
0dB, volume setting = 0dB, mono path gain = 0dB, SHDN = 1, SSM = 1). Speaker load resistors (R
LSP
) are terminated between
OUT+ and OUT-, headphone load resistors are terminated to GND, unless otherwise noted. C1 = C2 = C3 = 1µF. T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
DD
to GND ...........................................................................+6V
PV
DD
to PGND.......................................................................+6V
CPV
DD
to CPGND..................................................................+6V
CPV
SS
to CPGND .....................................................-6V to +0.3V
V
SS
to CPGND..........................................................-6V to +0.3V
C1N .......................................(CPV
SS
- 0.3V) to (CPGND + 0.3V)
C1P.......................................(CPGND - 0.3V) to (CPV
DD
+ 0.3V)
HPL, HPR to GND...................(CPV
SS
- 0.3V) to (CPV
DD
+ 0.3V)
GND to PGND and CPGND................................................±0.3V
V
DD
to PV
DD
and CPV
DD
....................................................±0.3V
SDA, SCL to GND.....................................................-0.3V to +6V
All other pins to GND..................................-0.3V to (V
DD
+ 0.3V)
Continuous Current In/Out of PV
DD
, PGND, CPV
DD
, CPGND,
OUT_ _, HPR, and HPL................................................±800mA
Continuous Input Current CPV
SS
....................................+260mA
Continuous Input Current (all other pins) .........................±20mA
Duration of Short Circuit Between
OUT+ and OUT-......................................................Continuous
Duration of HP_ OUT_ Short Circuit to
GND or PV
DD
..........................................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
36-Bump (3mm x 3mm) UCSP Multilayer Board
(derate 17.0mW/°C above +70°C)...........................1360.5mW
Junction Temperature......................................................+150°C
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
GENERAL
Supply Voltage Range
V
DD
,
PV
DD
,
CPV
DD
Inferred from PSRR test 2.7 5.5 V
Output mode 1, 6, 11 (Rx mode) 6.3 10
Output mode 4, 9, 14 (HP mode) 8 12.6
Output mode 2, 7, 12 (SP mode) 11.8 17.5
Quiescent Current I
DD
Output mode 3, 8, 13 (SP and HP modes) 15.1 21
mA
Mute Current I
MUTE
Current in mute 4.7 10 mA
Hard shutdown SHDN = GND 0.1 10
Shutdown Current I
SHDN
Soft shutdown
See the I
2
C Interface
section
8.5 15
µA
Turn-On Time t
ON
Time from shutdown or power-on to full
operation
30 ms
B and C pair inputs, T
A
= +25°C,
VOL = max
17.5 28 41.0 kΩ
Input Resistance R
IN
A pair inputs, T
A
= +25°C, +20dB 3.5 5.5 8.0 kΩ
Common-Mode Rejection Ratio CMRR T
A
= +25°C, V
IN
= ±500mV 45 50 dB
Input DC Bias Voltage V
BIAS
IN_ inputs 1.12 1.25 1.38 V
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
_______________________________________________________________________________________ 3
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SPEAKER AMPLIFIER
T
A
= +25°C ±5.5 ±23.5
Output Offset Voltage V
OS
T
MIN
≤ T
A
≤ T
MAX
±40
mV
Into shutdown -62
Out of shutdown -60
Into mute -63
Click-and-Pop Level K
CP
Peak voltage, T
A
=
+25°C, A-weighted,
32 samples per
second (Notes 3, 4)
Out of mute -62
dB
V
DD
= 2.7V to 5.5V 48 70
f = 217Hz, 100mV
P-P
ripple
68
f = 1kHz, 100mV
P-P
ripple
60
Power-Supply Rejection Ratio
(Note 3)
PSRR T
A
= +25°C
f = 20kHz, 100mV
P-P
ripple
50
dB
R
L
= 4Ω, V
DD
= 5V,
f = 1kHz
2300
R
L
= 8Ω, V
DD
= 3.3V,
f = 1kHz
600
Output Power (Note 4) P
OUT
THD+N = 1%,
T
A
= +25°C
R
L
= 8Ω, V
DD
= 5V,
f = 1kHz
1300
mW
Current Limit 1.6 A
R
L
= 8Ω,
P
OUT
= 800mW
0.03
Total Harmonic Distortion Plus
Noise (Note 4)
THD+N f = 1kHz
R
L
= 4Ω,
P
OUT
= 830mW
0.04
%
BW = 20Hz to 20kHz 81
Signal-to-Noise Ratio SNR
V
OUT
= 1.8V
RMS
,
R
L
= 8Ω (Note 3)
A-weighted 84
dB
Fixed-frequency modulation (SSM = 0) 1100
Output Frequency f
OSC
Spread-spectrum modulation (SSM = 1)
1100
±30
kHz
Efficiency η
P
OUT
= 470mW, f = 1kHz both channel
driven, L = 68µH in series with 8Ω load
80 %
Gain A
V
12 dB
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= PV
DD
= CPV
DD
= 3.3V, GND = PGND = CPGND = 0V, SHDN = V
DD
, I
2
C settings (INA gain = +20dB, INB gain = INC gain =
0dB, volume setting = 0dB, mono path gain = 0dB, SHDN = 1, SSM = 1). Speaker load resistors (R
LSP
) are terminated between
OUT+ and OUT-, headphone load resistors are terminated to GND, unless otherwise noted. C1 = C2 = C3 = 1µF. T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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MAX9796EBX+TG45

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Buy MAX9796EBX+TG45
Manufacturer:
Maxim Integrated
Description:
IC AMP AUDIO 2.3W MONO D 36UCSP
Lifecycle:
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