19-2841; Rev 1; 6/08
KIT
ATION
EVALU
BLE
AVAILA
3W Mono/Stereo BTL Audio Power Amplifiers
with Shutdown
General Description
The MAX9710/MAX9711 are stereo/mono 3W bridge-tied
load (BTL) audio power amplifiers. These devices are
PC99/01 compliant, operate from a single 4.5V to 5.5V
supply, and feature an industry-leading 100dB PSRR,
which allows these devices to operate from noisy sup-
plies without additional, costly power-supply condition-
ing. An ultra-low 0.005% THD+N ensures clean,
low-distortion amplification of the audio signal while
click-and-pop suppression eliminates audible transients
on power and shutdown cycles. Power-saving features
include low 2mV V
OS
(minimizing DC current drain
through the speakers), low 7mA supply current, and a
0.5µA shutdown mode. A MUTE function allows the out-
puts to be quickly enabled or disabled.
These devices include thermal overload protection, are
specified over the extended -40°C to +85°C tempera-
ture range, and are supplied in thermally efficient pack-
ages. The MAX9710 is available in a 20-pin thin QFN
package (5mm
✕
5mm
✕
0.8mm). The MAX9711 is
available in a 12-pin thin QFN package (4mm
✕
4mm
✕
0.8mm).
♦
3W into 3Ω (1% THD+N)
♦
4W into 3Ω (10% THD+N)
♦
Industry-Leading, Ultra-High 100dB PSRR
♦
PC99/01 Compliant
♦
Click-and-Pop Suppression
♦
Low 0.005% THD+N
♦
Low Quiescent Current: 7mA
♦
Low-Power Shutdown Mode: 0.5µA
♦
MUTE Function
♦
Tiny 20-Pin Thin QFN (5mm
✕
5mm
✕
0.8mm)
Features
MAX9710/MAX9711
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
AMP
Stereo
Mono
MAX9710ETP
MAX9711ETC
-40°C to +85°C 20-Thin QFN-EP*
-40°C to +85°C 12-Thin QFN-EP*
Applications
Notebook PCs
Flat-Panel TVs
Flat-Panel PC Displays
Two-Way Radios
General-Purpose Audio
Powered Speakers
*EP
= Exposed pad.
Pin Configurations
TOP VIEW
OUTL+
OUTL-
PGND
PV
DD
N.C.
Simplified Block Diagram
SINGLE SUPPLY
4.5V TO 5.5V
20
INL
BIAS
N.C.
MUTE
INR
1
2
3
4
5
6
PGND
19
18
17
16
15
14
PGND
SHDN
N.C.
V
DD
RIGHT IN
LEFT IN
MAX9710
13
12
11
MAX9710
PGND
7
OUTR+
8
PV
DD
9
OUTR-
10
N.C.
TQFN
Pin Configurations continued at end of data sheet.
________________________________________________________________
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.
3W Mono/Stereo BTL Audio Power Amplifiers
with Shutdown
MAX9710/MAX9711
ABSOLUTE MAXIMUM RATINGS
V
DD
to GND, PGND ...............................................................+6V
PV
DD
to V
DD
.......................................................................±0.3V
PGND to GND.....................................................................±0.3V
All Other Pins to GND.................................-0.3V to (V
DD
+ 0.3V)
Continuous Input Current (into any pin
except power supply and output pins).........................±20mA
Continuous Power Dissipation (T
A
= +70°C)
12-Pin Thin QFN (derate 16.9mW/°C above +70°C) ....1349mW
20-Pin Thin QFN (derate 20.8mW/°C above +70°C) ....1667mW
Operating Temperature Range............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
ELECTRICAL CHARACTERISTICS
(V
DD
= PV
DD
= 5.0V, V
GND
= V
PGND
= V
MUTE
= 0V, V
SHDN
= 5V, R
IN
= R
F
= 15kΩ, R
L
=
∞.
T
A
= T
MIN
to T
MAX
, unless otherwise
noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Supply Voltage Range
Quiescent Supply Current
(I
VDD
+ I
PVDD
)
Shutdown Supply Current
Turn-On Time
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
OUTPUT AMPLIFIERS
Output Offset Voltage
Power-Supply Rejection Ratio
V
OS
PSRR
V
OUT_+
- V
OUT_-
, A
V
= 2
V
RIPPLE
= 200mV
P-P
(Note 2)
f
IN
= 1kHz,
THD+N < 1%
f
IN
= 1kHz, BW =
22Hz to 22kHz
V
DD
= 4.5V to 5.5V
f = 1kHz
f = 20kHz
R
L
= 8Ω
R
L
= 4Ω
R
L
= 3Ω
P
OUT
= 1.2W, R
L
= 8Ω
P
OUT
= 2W, 4Ω
1.1
82
±2
100
87
74
1.4
2.6
3
0.005
0.01
95
1.6
No sustained oscillations
f
IN
= 10kHz
V
BIAS
R
BIAS
V
IH
V
IL
I
IN
2
0.8
±1
2.35
1
77
2.5
50
2.65
%
dB
V/µs
nF
dB
V
kΩ
V
V
µA
W
dB
±14
mV
SYMBOL
V
DD
/PV
DD
I
DD
I
SHDN
t
ON
MAX9710
MAX9711
SHDN
= GND
C
BIAS
= 1µF (10% of final value)
C
BIAS
= 0.1µF (10% of final value)
CONDITIONS
Inferred from PSRR test
MIN
4.5
12
7
0.5
300
30
160
15
TYP
MAX
5.5
30
17
30
UNITS
V
mA
µA
ms
°C
°C
Output Power
Total Harmonic Distortion Plus
Noise
Signal-to-Noise Ratio
Slew Rate
Maximum Capacitive Load Drive
Crosstalk
BIAS VOLTAGE (BIAS)
BIAS Voltage
Output Resistance
DIGITAL INPUTS (MUTE,
SHDN)
Input Voltage High
Input Voltage Low
Input Leakage Current
P
OUT
THD+N
SNR
SR
C
L
R
L
= 8Ω, V
OUT
= 2.8V
RMS
, BW = 22Hz to 22kHz
Note 1:
All devices are 100% production tested at +25°C. All temperature limits are guaranteed by design.
Note 2:
PSSR is specified with the amplifier inputs connected to GND through R
IN
and C
IN
.
2
_______________________________________________________________________________________
3W Mono/Stereo BTL Audio Power Amplifiers
with Shutdown
Typical Operating Characteristics
(V
DD
= 5V, THD+N measurement bandwidth = 22Hz to 22kHz, T
A
= +25°C, unless otherwise noted.)
MAX9710/MAX9711
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
MAx9710/11 toc01
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
MAx9710/11 toc02
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
R
L
= 4Ω
A
V
= -2V/V
MAx9710/11 toc03
MAX9710/11 toc09
MAx9710/11 toc06
1
R
L
= 3Ω
A
V
= -2V/V
1
R
L
= 3Ω
A
V
= -4V/V
1
0.1
THD+N (%)
THD+N (%)
P
OUT
= 500mW
0.1
P
OUT
= 500mW
THD+N (%)
0.1
P
OUT
= 250mW
0.01
P
OUT
= 2.5W
P
OUT
= 2W
0.001
10
100
1k
FREQUENCY (Hz)
10k
100k
10
100
1k
FREQUENCY (Hz)
10k
100k
0.01
P
OUT
= 2.5W
0.001
10
100
1k
FREQUENCY (Hz)
10k
100k
0.01
0.001
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
MAx9710/11 toc04
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
MAx9710/11 toc05
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
1
R
L
= 8Ω
A
V
= -4V/V
1
R
L
= 4Ω
A
V
= -4V/V
1
R
L
= 8Ω
A
V
= -2V/V
0.1
THD+N (%)
P
OUT
= 250mW
THD+N (%)
0.1
THD+N (%)
0.1
P
OUT
= 250mW
0.01
P
OUT
= 250mW
0.01
0.01
P
OUT
= 2W
0.001
10
100
1k
FREQUENCY (Hz)
10k
100k
P
OUT
= 1.2W
0.001
10
100
1k
FREQUENCY (Hz)
10k
100k
P
OUT
= 1.2W
0.001
10
100
1k
FREQUENCY (Hz)
10k
100k
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX9710/11 toc07
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX9710/11 toc08
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
100
A
V
= -2V/V
R
L
= 4Ω
100
A
V
= -2V/V
R
L
= 3Ω
100
A
V
= -4V/V
R
L
= 3Ω
10
10
10
THD+N (%)
1
f = 10kHz
THD+N (%)
THD+N (%)
1
f = 10kHz
0.1
f = 1kHz
1
f = 10kHz
0.1
f = 20Hz
0.1
f = 1kHz
0.01
f = 1kHz
0.001
0
1
2
OUTPUT POWER (W)
3
4
0.01
f = 20Hz
0.001
0
1
2
OUTPUT POWER (W)
3
4
0.01
f = 20Hz
0.001
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
OUTPUT POWER (W)
_______________________________________________________________________________________
3
3W Mono/Stereo BTL Audio Power Amplifiers
with Shutdown
MAX9710/MAX9711
Typical Operating Characteristics (continued)
(V
DD
= 5V, THD+N measurement bandwidth = 22Hz to 22kHz, T
A
= +25°C, unless otherwise noted.)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX9710/11 toc10
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX9710/11 toc11
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
A
V
= -4V/V
R
L
= 8Ω
MAX9710/11 toc12
100
A
V
= -4V/V
R
L
= 4Ω
100
A
V
= -2V/V
R
L
= 8Ω
100
10
10
10
THD+N (%)
THD+N (%)
THD+N (%)
1
f = 10kHz
0.1
f = 1kHz
1
1
f = 10kHz
f = 1kHz
0.1
f = 1kHz
f = 10kHz
0.1
0.01
f = 20Hz
0.001
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
OUTPUT POWER (W)
0.01
f = 20Hz
0.001
0
0.5
1.0
OUTPUT POWER (W)
1.5
2.0
0.01
f = 20Hz
0.001
0
0.5
1.0
OUTPUT POWER (W)
1.5
2.0
OUTPUT POWER
vs. TEMPERATURE
MAX9710/11 toc13
OUTPUT POWER
vs. TEMPERATURE
MAX9710/11 toc14
OUTPUT POWER
vs. TEMPERATURE
THD+N = 10%
MAX9710/11 toc15
4
THD+N = 10%
3
THD+N = 1%
2
4
2.0
OUTPUT POWER (W)
OUTPUT POWER (W)
OUTPUT POWER (W)
3
THD+N = 10%
THD+N = 1%
1.5
THD+N = 1%
1.0
2
1
f = 1kHz
R
L
= 3Ω
0
-40
-15
10
35
60
85
TEMPERATURE (°C)
1
f = 1kHz
R
L
= 4Ω
0
-40
-15
10
35
60
85
TEMPERATURE (°C)
0.5
f = 1kHz
R
L
= 8Ω
0
-40
-15
10
35
60
85
TEMPERATURE (°C)
OUTPUT POWER vs. LOAD RESISTANCE
(FORCED-AIR COOLING)
V
DD
= 5V
f = 1kHz
MAX9710/11 toc16
POWER DISSIPATION
vs. OUTPUT POWER
MAX9710/11 toc17
POWER DISSIPATION
vs. OUTPUT POWER
0.7
POWER DISSIPATION (W)
0.6
0.5
0.4
0.3
0.2
0.1
0
0
0.25
0.50
0.75
1.00
OUTPUT POWER (W)
R
L
= 8Ω
f = 1kHz
1.25
1.50
MAX9710/11 toc18
5
1.6
1.4
POWER DISSIPATION (W)
1.2
1.0
0.8
0.6
0.4
0.2
R
L
= 4Ω
f = 1kHz
0
0.5
1.0
1.5
2.0
0.8
4
OUTPUT POWER (W)
3
THD+N = 10%
THD+N = 1%
2
1
0
1
10
100
1000
LOAD RESISTANCE (Ω)
0
OUTPUT POWER (W)
2.5
4
_______________________________________________________________________________________
3W Mono/Stereo BTL Audio Power Amplifiers
with Shutdown
Typical Operating Characteristics (continued)
(V
DD
= 5V, THD+N measurement bandwidth = 22Hz to 22kHz, T
A
= +25°C, unless otherwise noted.)
MAX9710/MAX9711
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9710/11 toc19
CROSSTALK vs. FREQUENCY
V
IN
= 200mV
P-P
R
L
= 8Ω
MAX9710/11 toc20
0
V
RIPPLE
= 200mV
P-P
-20
0
-20
CROSSTALK (dB)
-40
-60
RIGHT TO LEFT
-80
-100
PSRR (dB)
-40
-60
-80
LEFT TO RIGHT
-100
10
100
1k
FREQUENCY (Hz)
10k
100k
-120
0.01
0.1
1
FREQUENCY (Hz)
10
100
ENTERING SHUTDOWN
MAX9710/11 toc21
EXITING SHUTDOWN
MAX9710/11 toc22
SHDN
2V/div
SHDN
2V/div
OUT_+ AND
OUT_-
OUT_+ -
OUT_-
100ms/div
R
L
= 8Ω
INPUT AC-COUPLED TO GND
1V/div
OUT_+ AND
OUT_-
OUT_+ -
OUT_-
100ms/div
R
L
= 8Ω
INPUT AC-COUPLED TO GND
1V/div
200mV/div
200mV/div
ENTERING POWER-DOWN
MAX9710/11 toc23
EXITING POWER-DOWN
MAX9710/11 toc24
V
DD
2V/div
V
DD
2V/div
OUT_+ AND
OUT_-
OUT_+ -
OUT_-
100ms/div
R
L
= 8Ω
INPUT AC-COUPLED TO GND
1V/div
OUT_+ AND
OUT_-
OUT_+ -
OUT_-
100ms/div
R
L
= 8Ω
INPUT AC-COUPLED TO GND
1V/div
200mV/div
200mV/div
_______________________________________________________________________________________
5
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