MAX9717DEUA [MAXIM]
Low-Cost, Mono, 1.4W BTL Audio Power Amplifiers; 低成本，单声道， 1.4W BTL音频功率放大器
| 型号： | MAX9717DEUA |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Low-Cost, Mono, 1.4W BTL Audio Power Amplifiers |
| 文件： | 总19页 (文件大小：333K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-3146; Rev 0; 1/04
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
Ge n e ra l De s c rip t io n
Fe a t u re s
The MAX9716/MAX9717 audio power amplifiers are ideal
for portable audio devices with internal speakers. A
bridge-tied load (BTL) architecture minimizes external
component count, while providing high-quality audio
reproduction. Both devices deliver 1.4W continuous
power into a 4Ω load with less than 1% Total Harmonic
Distortion (THD) while operating from a single +5V sup-
ply. With an 8Ω load, both devices deliver 1W continuous
power. These devices also deliver 350mW continuous
power into an 8Ω load while operating from a single
+3.0V supply. The devices are available as adjustable
gain amplifiers (MAX9716/MAX9717A) or with internally
fixe d g a ins of 6d B, 9d B, a nd 12d B (MAX9717B/
MAX9717C/MAX9717D), reducing component count.
♦ 2.7V to 5.5V Single-Supply Operation
♦ 1.4W into 4Ω at 1% THD+N
♦ 10nA Low-Power Shutdown Mode
♦ 73dB PSRR at 1kHz
♦ No Audible Clicks or Pops at Power-Up/Down
♦ Internal Fixed Gain to Reduce Component Count
(MAX9717B/C/D)
♦ Adjustable Gain Option (MAX9716/MAX9717A)
♦ BTL/SE Input Senses when Headphones are
Connected (MAX9717)
A low-power shutdown mode disables the bias generator
and amplifiers, reducing quiescent current consumption
to le s s tha n 10nA. The s e d e vic e s fe a ture Ma xim’s
industry-leading, comprehensive click-and-pop sup -
pression that reduces audible clicks and pops during
startup and shutdown.
♦ Pin Compatible with LM4890 (MAX9716)
♦ Pin Compatible with TPA711 (MAX9717A)
♦ Available in Compact, Thermally Enhanced µMAX
and TDFN (3mm x 3mm) Packages
The MAX9717 features a headphone sense input (BTL/SE)
that senses when a headphone is connected to the
device, disables the BTL slave driver, muting the speaker
while driving the headphone as a single-ended load.
Ord e rin g In fo rm a t io n
PIN-
GAIN
(dB)
PART
TEMP RANGE
PACKAGE
The MAX9716 is pin compatible with the LM4890 and is
a va ila b le in 9-b ump UCSP™, 8-p in TDFN (3mm x
3mm), and 8-pin µMAX packages. The MAX9717 is
a va ila b le in 9-b ump UCSP, 8-p in TDFN, a nd 8-p in
µMAX packages. Both devices operate over the -40°C
to +85°C extended temperature range.
MAX9716ETA
MAX9716EBL-T*
MAX9716EUA
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
8 TDFN-EP**
3 x 3 UCSP
Adj.
Adj.
Adj.
8 µMAX-EP**
*Future product—contact factory for availability.
**EP = Exposed paddle.
Ordering Information continued at end of data sheet.
Ap p lic a t io n s
Mobile Phones
PDAs
Pin Configurations and Selector Guide appear at end of data
sheet.
Portable Devices
S im p lifie d Blo c k Dia g ra m s
SINGLE SUPPLY
2.7V TO 5.5V
SINGLE SUPPLY
2.7V TO 5.5V
BIAS
BIAS
MAX9716
MAX9717B/C/D
IN-
IN-
BTL/SE
V
CC
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V to GND) ..................................-0.3V to +6V
9-Bump UCSP (derate 5.2mW/°C above 70°C)...........412mW
Operating Temperature Range ..........................-40°C to +85°C
Maximum Junction Temperature ....................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Bump Temperature (soldering)........................................+235°C
CC
Any Other Pin to GND ...............................-0.3V to (V + 0.3V)
CC
IN_, BIAS, SHDN, BTL/SE Continuous Current...................20mA
OUT_ Short-Circuit Duration to GND or V (Note 1)...Continuous
CC
Continuous Power Dissipation (T = +70°C)
A
8-Pin TDFN (derate 24.4mW/°C above +70°C) .........1951mW
8-Pin µMAX (derate 10.3mW/°C above +70°C) ...........825mW
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—5V Supply
(V = 5V, GND = 0, SHDN = V , T = +25°C. C
= 1µF, R = R = 20kΩ (MAX9716/MAX9717A), IN+ = BIAS (MAX9716),
CC
CC
A
BIAS
IN F
BTL/SE = GND (MAX9717_), R = ∞ connected between OUT+ and OUT-. Typical values are at T = +25°C.) (Note 2)
L
A
PARAMETER
Supply Voltage
SYMBOL
CONDITIONS
Inferred by PSRR test
= V = V (Note 3),
MIN
TYP
MAX
UNITS
V
CC
2.7
5.5
V
V
IN-
IN+
BIAS
Quiescent Supply Current
Shutdown Supply Current
SHDN Threshold
I
CC
4.3
8
1
mA
µA
V
T
A
= -40°C to +85°C
I
SHDN = GND
0.01
SHDN
V
IH
1.2
V
IL
0.4
0.9 x
V
CC
V
IH
BTL/SE Threshold
V
0.7 x
V
CC
V
IL
V
- 6%
/2
V
+ 6%
/2
CC
CC
Common-Mode Bias Voltage
Output Offset Voltage
V
(Note 4)
V
/2
V
BIAS
CC
V
V
IN-
= V
, V
= V (Note 5)
BIAS
±7
80
61
73
±15
mV
OS
OUT+ IN+
V
CC
= 2.7V to 5.5V
DC, V
= 1.5V
60
BIAS
V
IN+
= V
,
Power-Supply Rejection Ratio
PSRR
dB
f = 217Hz
f = 1kHz
BIAS
V
RIPPLE
= 200mV
,
P-P
R = 8Ω (Note 6)
L
R
R
R
= 8Ω, THD+N = 1%, f = 1kHz (Note 7)
0.8
1.1
1.4
L
IN
= 4Ω, THD+N = 1%, f = 1kHz (Note 7)
L
IN
Output Power
P
W
%
OUT
= 16Ω, BTL/SE = V (single-ended
L
CC
0.155
0.024
mode), THD+N = 1%, f = 1kHz
IN
Total Harmonic Distortion Plus
Noise
A = 6dB, R = 8Ω, f = 1kHz,
V
L
IN
THD+N
P
= 0.5W (Note 8)
OUT
Output Noise Density
Signal-to-Noise Ratio
e
n
f
= 10kHz
106
105
nV/√Hz
IN
SNR
THD+N = 1%
dB
2
_______________________________________________________________________________________
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
ELECTRICAL CHARACTERISTICS—5V Supply (continued)
(V = 5V, GND = 0, SHDN = V , T = +25°C. C
= 1µF, R = R = 20kΩ (MAX9716/MAX9717A), IN+ = BIAS (MAX9716),
CC
CC
A
BIAS
IN F
BTL/SE = GND (MAX9717_), R = ∞ connected between OUT+ and OUT-. Typical values are at T = +25°C.) (Note 2)
L
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
1.1
+160
15
MAX
UNITS
A
Output Short-Circuit Current Limit
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
I
SC
(Note 9)
°C
°C
250
25
Power-Up/Enable from Shutdown
Time (Note 10)
t
ms
PU
C
= 0.1µF
BIAS
Shutdown Time
Input Resistance
t
5
µs
SHDN
R
MAX9717B/C/D
12
20
28
kΩ
IN
ELECTRICAL CHARACTERISTICS—3V Supply
(V = 3V, GND = 0, SHDN = V , T = +25°C. C
= 1µF, R = R = 20kΩ (MAX9716/MAX9717A), IN+ = BIAS (MAX9716),
CC
CC
A
BIAS
IN F
BTL/SE = GND (MAX9717_), R = ∞ connected between OUT+ and OUT-. Typical values are at T = +25°C.) (Note 2)
L
A
PARAMETER
Quiescent Supply Current
Shutdown Supply Current
SHDN Threshold
SYMBOL
CONDITIONS
= V (Note 3),
MIN
TYP
4
MAX
8.0
1
UNITS
mA
µA
V
T
A
= V
IN+
IN-
BIAS
I
CC
= -40°C to +85°C
I
SHDN = GND
0.01
SHDN
V
IH
1.2
V
V
IL
0.4
0.9 x
V
CC
V
IH
BTL/SE Threshold
V
0.7 x
V
CC
V
IL
V
- 9%
/2
V
+ 9%
/2
CC
CC
Common-Mode Bias Voltage
Output Offset Voltage
V
(Note 4)
V
/2
V
BIAS
CC
V
V
IN-
= V
, V
= V (Note 5)
BIAS
±7
61
73
±15
mV
OS
OUT+ IN+
V
IN+
= V
,
f = 217Hz
f = 1kHz
BIAS
Power-Supply Rejection Ratio
Output Power
PSRR
V
RIPPLE
= 200mV
,
dB
P-P
R = 8Ω (Note 6)
L
R = 8Ω, THD+N = 1%, f = 1kHz (Note 7)
L
350
525
IN
P
mW
%
OUT
R = 4Ω, THD+N = 1%, f = 1kHz (Note 7)
L
IN
Total Harmonic Distortion Plus
Noise
A = 6dB, R = 8Ω, f = 1kHz,
V
L
IN
THD+N
0.024
P
= 0.5W, V = 3V (Note 8)
OUT
CC
Output-Noise Density
Signal-to-Noise Ratio
e
n
f
= 10kHz
106
100
nV/√Hz
IN
SNR
THD+N = 1%
dB
_______________________________________________________________________________________
3
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
ELECTRICAL CHARACTERISTICS—3V Supply (continued)
(V = 3V, GND = 0, SHDN = V , T = +25°C. C
= 1µF, R = R = 20kΩ (MAX9716/MAX9717A), IN+ = BIAS (MAX9716),
CC
CC
A
BIAS
IN F
BTL/SE = GND (MAX9717_), R = ∞ connected between OUT+ and OUT-. Typical values are at T = +25°C.) (Note 2)
L
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
1.1
+160
15
MAX
UNITS
A
Output Short-Circuit Current Limit
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
I
SC
(Note 9)
°C
°C
250
25
Power-Up/Enable from Shutdown
Time (Note 10)
t
ms
PU
C
= 0.1µF
BIAS
Shutdown Time
Input Resistance
t
5
µs
SHDN
R
MAX9717B/C/D
12
20
28
kΩ
IN
Note 1: Continuous power dissipation must also be observed.
Note 2: All specifications are tested at T = +25°C. Specifications over temperature (T = T
to T ) are not production tested,
MAX
A
A
MIN
and guaranteed by design.
Note 3: Quiescent power-supply current is specified and tested with no load. Quiescent power-supply current depends on the off-
set voltage when a practical load is connected to the amplifier.
Note 4: Common-mode bias voltage is the voltage on BIAS and is nominally V /2.
CC
Note 5: V = V
- V
OUT-.
OS
OUT+
Note 6: The amplifier input IN- is AC-coupled to GND through C
.
IN
Note 7: Output power is specified by a combination of a functional output current test and characterization analysis.
Note 8: Measurement bandwidth for THD+N is 22Hz to 22kHz.
Note 9: Extended short-circuit conditions result in a pulsed output.
Note 10: Time for V
to rise to 50% of final DC value.
OUT
4
_______________________________________________________________________________________
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(V = 5V, THD+N measurement bandwidth = 22Hz to 22kHz, BTL mode, T = +25°C, unless otherwise noted.)
CC
A
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
100
10
100
10
100
V
= 5V
V
= 3V
V
= 5V
CC
CC
CC
R = 8Ω
R = 8Ω
R = 8Ω
L
L
L
A = 12dB
V
A = 6dB
V
A = 6dB
V
10
1
1
1
OUTPUT POWER = 250mW
0.1
0.1
OUTPUT POWER = 800mW
0.1
OUTPUT POWER = 800mW
0.01
0.001
0.01
0.001
0.01
0.001
OUTPUT POWER = 30mW
OUTPUT POWER = 30mW
OUTPUT POWER = 200mW
10
10
10
100
1k
10k
100k
100k
100k
10
100
1k
10k
100k
10
10
10
100
1k
10k
100k
100k
100k
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
100
10
100
10
100
10
V
= 5V
V
= 5V
V
= 3V
CC
CC
CC
R = 4Ω
L
R = 4Ω
L
R = 8Ω
L
A = 6dB
V
A = 12dB
V
A = 12dB
V
1
1
1
OUTPUT POWER = 1W
OUTPUT POWER = 1W
OUTPUT POWER = 200mW
0.1
0.1
0.1
OUTPUT POWER = 200mW
OUTPUT POWER = 250mW
0.01
0.001
0.01
0.001
0.01
0.001
OUTPUT POWER = 50mW
100
1k
10k
10
100
1k
10k
100k
100
1k
10k
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (SINGLE-ENDED)
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
100
10
100
10
100
10
V
= 3V
V
= 3V
R = 4Ω
A = 12dB
V
V = 5V
CC
R = 16Ω
A = 12dB
V
CC
CC
R = 4Ω
L
L
L
A = 6dB
V
1
1
1
0.1
OUTPUT POWER = 350mW
OUTPUT POWER = 350mW
OUTPUT POWER = 125mW
0.1
0.1
0.01
0.001
0.0001
OUTPUT POWER = 50mW
0.01
0.001
0.01
0.001
OUTPUT POWER = 50mW
OUTPUT POWER = 25mW
100
1k
10k
100
1k
10k
10
100
1k
10k
100k
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
_______________________________________________________________________________________
5
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V = 5V, THD+N measurement bandwidth = 22Hz to 22kHz, BTL mode, T = +25°C, unless otherwise noted.)
CC
A
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
100
100
10
100
10
V
= 5V
V
= 5V
V = 3V
CC
CC
CC
R = 8Ω
R = 8Ω
R = 8Ω
L
L
L
A = 6dB
V
A = 12dB
V
A = 6dB
V
10
1
1
1
f
IN
= 10kHz
f
IN
= 100Hz
f
IN
= 100Hz
f
IN
= 10kHz
f
IN
= 10kHz
0.1
0.1
0.1
0.01
0.001
0.01
0.001
0.01
0.001
f
IN
= 1kHz
f
IN
= 1kHz
f = 1kHz
IN
f
IN
= 100Hz
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4
OUTPUT POWER (W)
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4
OUTPUT POWER (W)
0
100
200
300
400
500
OUTPUT POWER (mW)
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
100
10
100
10
100
10
V
= 5V
V
= 3V
V = 5V
CC
CC
CC
R = 4Ω
R = 8Ω
R = 4Ω
L
L
L
A = 12dB
V
A = 12dB
V
A = 6dB
V
1
1
1
f
IN
= 10kHz
f = 10kHz
IN
f
IN
= 100Hz
f
IN
= 10kHz
0.1
0.1
0.1
0.01
0.001
0.01
0.001
f
IN
= 1kHz
0.01
0.001
f
IN
= 100Hz
f
IN
= 1kHz
f
IN
= 1kHz
f
IN
= 100Hz
0
100
200
300
400
500
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
OUTPUT POWER (W)
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
OUTPUT POWER (W)
OUTPUT POWER (mW)
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SINGLE-ENDED)
100
10
100
10
100
V
= 3V
CC
V
= 3V
V = 5V
CC
CC
R = 4Ω
L
R = 4Ω
R = 16Ω
L
L
A = 6dB
V
A = 12dB
V
A = 6dB
V
f
IN
= 100Hz
10
f
IN
= 1kHz
1
1
1
f
IN
= 10kHz
f
IN
= 1kHz
f
IN
= 1kHz
f
IN
= 10kHz
f
IN
= 10kHz
0.1
0.1
0.1
0.01
0.001
0.01
0.001
0.01
0.001
f
IN
= 100Hz
f
IN
= 100Hz
0
100 200 300 400 500 600 700 800
OUTPUT POWER (mW)
0
100 200 300 400 500 600 700 800
OUTPUT POWER (mW)
0
25 50 75 100 125 150 175 200 225 250
OUTPUT POWER (mW)
6
_______________________________________________________________________________________
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V = 5V, THD+N measurement bandwidth = 22Hz to 22kHz, BTL mode, T = +25°C, unless otherwise noted.)
CC
A
OUTPUT POWER
vs. SUPPLY VOLTAGE
OUTPUT POWER
vs. SUPPLY VOLTAGE
OUTPUT POWER
vs. LOAD RESISTANCE
1.8
3.0
2.5
2.0
1.5
1.0
0.5
0
V
= 5V
R = 4Ω
CC
R = 8Ω
L
L
f = 1kHz
A = 6dB
f = 1kHz
f = 1kHz
1.5
1.2
0.9
0.6
0.3
0
2.5
2.0
A = 6dB
V
V
A = 6dB
V
THD+N = 10%
THD+N = 1%
THD+N = 10%
THD+N = 10%
1.5
1.0
0.5
0
THD+N = 1%
THD+N = 1%
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
1
10
100
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
LOAD RESISTANCE (Ω)
OUTPUT POWER
vs. LOAD RESISTANCE
POWER DISSIPATION
vs. OUTPUT POWER
POWER DISSIPATION
vs. OUTPUT POWER
700
600
500
400
300
200
100
0
1.0
0.8
0.6
0.4
0.2
0
300
250
200
150
100
50
V
= 3V
V
= 5V
V = 3V
CC
CC
CC
f = 1kHz
A = 6dB
V
R = 8Ω
R = 8Ω
L
L
f = 1kHz
f = 1kHz
A = 6dB
V
A = 6dB
V
THD+N = 10%
THD+N = 1%
0
1
10
100
0
0.3
0.6
0.9
1.2
1.5
0
100
200
300
400
500
LOAD RESISTANCE (Ω)
OUTPUT POWER (W)
OUTPUT POWER (mW)
POWER DISSIPATION
vs. OUTPUT POWER
POWER DISSIPATION
vs. OUTPUT POWER
OUTPUT-NOISE DENSITY
vs. FREQUENCY
2.0
1.6
1.2
0.8
0.4
0
700
600
500
400
300
200
100
0
600
500
400
300
200
100
0
A = 6dB
V
V
= 5V
V = 3V
CC
CC
R = 4Ω
R = 4Ω
L
L
f = 1kHz
f = 1kHz
A = 6dB
V
A = 6dB
V
0
0.4
0.8
1.2
1.6
2.0
0
100 200 300 400 500 600 700
OUTPUT POWER (mW)
100
1k
10k
100k
OUTPUT POWER (W)
FREQUENCY (Hz)
_______________________________________________________________________________________
7
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V = 5V, THD+N measurement bandwidth = 22Hz to 22kHz, BTL mode, T = +25°C, unless otherwise noted.)
CC
A
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
GAIN AND PHASE vs. FREQUENCY
SUPPLY CURRENT vs. V
CC
120
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
0
A = 60dB
V
90
60
-10
-20
-30
-40
-50
-60
-70
-80
-90
30
0
-30
-60
-90
-120
10
100
1k
10k 100k 1M 10M
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
(V)
10
100
1k
10k
100k
FREQUENCY (Hz)
V
CC
FREQUENCY (Hz)
SUPPLY CURRENT
vs. TEMPERATURE
GOING INTO SHUTDOWN
COMING OUT OF SHUTDOWN
MAX9716 toc33
MAX9716 toc32
6
SHDN
2V/div
R = 8
Ω
R = 8Ω
L
L
5
4
3
2
1
V
CC
= 5V
OUT+
1V/div
SHDN
2V/div
OUT-
1V/div
V
CC
= 3V
OUT+
1V/div
OUT-
1V/div
OUT+ - OUT-
200mV/div
OUT+ - OUT-
200mV/div
10µs/div
-40
-15
10
35
60
85
100ms/div
TEMPERATURE (°C)
SHUTDOWN CURRENT
vs. TEMPERATURE
SHUTDOWN CURRENT vs. V
CC
20
18
16
14
12
10
8
40
35
30
25
20
15
10
5
V
CC
= 5V
6
4
V
CC
= 3V
2
0
0
2.5
3.0
3.5
4.0
(V)
4.5
5.0
5.5
-40
-15
10
35
60
85
V
TEMPERATURE (°C)
CC
8
_______________________________________________________________________________________
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
P in De s c rip t io n
PIN
BUMP
NAME
FUNCTION
TDFN/µMAX
UCSP
MAX9716 MAX9717 MAX9716 MAX9717
1
1
C3
C3
SHDN
Active-Low Shutdown
DC Bias Bypass Capacitor Connection. Bypass BIAS to ground with a
1µF capacitor.
2
2
C1
C1
BIAS
3
4
5
6
7
—
4
A3
A1
—
A1
IN+
IN-
Noninverting Input
Inverting Input
5
A2
A2
OUT+
Bridge Amplifier Positive Output
6
B3
B3
V
CC
Power Supply. Bypass V with a 1µF capacitor to ground.
CC
7
B1, B2
B1, B2
GND
Ground
Bridge Amplifier Negative Output. OUT- becomes high-impedance
when BTL/SE is driven high.
8
8
C2
C2
OUT-
BTL/Single-Ended Mode Input. Logic low sets the device in BTL mode.
Logic high sets the device in single-ended mode.
—
3
—
—
A3
—
BTL/SE
EP
EP
EP
Exposed Pad. Connect EP to GND.
input. Always bypass BIAS to ground with a capacitor.
Choose the value of the bypass capacitor as described in
the BIAS Capacitor section. Do not connect external loads
to BIAS. Any load lowers the BIAS voltage, affecting the
overall performance of the device.
De t a ile d De s c rip t io n
The MAX9716/MAX9717 are 1.3W BTL speaker ampli-
fie rs . Both d e vic e s fe a ture a low-p owe r s hutd own
mode, and industry-leading click-and-pop suppression.
The MAX9717 features a headphone sense input that
disables the slave BTL amplifier to drive the headphone
as a single-ended load. These devices consist of high
output-current audio amps configured as BTL ampli-
fiers (see Functional Diagrams). The closed-loop gain
of the input op amp sets the single-ended gain of the
device. Two external gain resistors set the gain of the
MAX9716 a nd MAX9717A (s e e the Ga in-Se tting
Resistor section). The MAX9717B/C/D feature internally
set gains of 6dB, 9dB, and 12dB, respectively.
BTL/S E Co n t ro l In p u t
The MAX9717 fe a ture s a he a d p hone s e ns e inp ut,
BTL/SE, that enables headphone jack sensing to con-
trol the power amplifier output configuration. Driving
BTL/SE low enables the slave amplifier (OUT-). Driving
BTL/SE high disables the slave amplifier.
S h u t d o w n Mo d e
The MAX9716/MAX9717 feature a low-power shutdown
mode that reduces quiescent current consumption to
10nA. Entering shutdown disables the bias circuitry,
forces the amplifier outputs to GND through an internal
20kΩ re s is tor. Drive SHDN low to e nte r s hutd own
mode; drive SHDN high for normal operation.
The output of the first amplifier serves as the input of the
second amplifier, which is configured as an inverting
unity-gain follower. This results in two outputs, identical in
amplitude, but 180° out-of-phase.
BIAS
The MAX9716/MAX9717 operate from a single 2.7V to
5.5V supply and feature an internally generated, common-
Clic k -a n d -P o p S u p p re s s io n
The MAX9716/MAX9717 feature Maxim’s industry-leading
click-and-pop suppression circuitry. During startup, the
amplifier common-mode bias voltage ramps to the DC
bias. When entering shutdown, the amplifier outputs are
pulled to GND through an internal 20kΩ resistor. This
scheme minimizes the energy present in the audio band.
mode bias voltage of V /2 referenced to ground. BIAS
CC
provides both click-and-pop suppression and sets the DC
bias level for the audio outputs. The MAX9716 can be
configured as a single-ended or differential input. For sin-
gle-ended input, connect the noninverting input IN+ to
BIAS externally. The MAX9717 BIAS is internally connect-
ed to the amplifier noninverting input IN+.
The MAX9717 can only be used with a single-ended
_______________________________________________________________________________________
9
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
P o w e r Dis s ip a t io n a n d He a t S in k in g
Und e r norma l op e ra ting c ond itions , the MAX9716/
MAX9717 dissipate a significant amount of power. The
maximum power dissipation for each package is given
in the Ab s olute Ma ximum Ra ting s s e c tion und e r
Continuous Power Dissipation or can be calculated by
the following equation:
V
+1
OUT(P-P)
2 x V
OUT(P-P)
T
− T
A
J(MAX)
P
=
DISSPKG(MAX)
θ
V
-1
OUT(P-P)
JA
where T
is +150°C, T is the ambient temperature,
A
J(MAX)
and θ is the reciprocal of the derating factor in °C/W as
JA
specified in the Absolute Maximum Ratings section. For
example, θ of the TDFN package is 41°C/W.
JA
Figure 1. Bridge-Tied Load Configuration
The increase in power delivered by the BTL configuration
directly results in an increase in internal power dissipation
over the single-ended configuration. The maximum power
Ap p lic a t io n s In fo rm a t io n
BTL Am p lifie r
The MAX9716/MAX9717 are designed to drive a load
differentially, a configuration referred to as bridge-tied
load or BTL. The BTL configuration (Figure 1) offers
advantages over the single-ended configuration, where
one side of the load is connected to ground. Driving the
load differentially doubles the output voltage compared
to a single-ended amplifier under similar conditions.
Thus, the differential gain of the device is twice the
closed-loop gain of the input amplifier. The effective
gain is given by:
dissipation for a given V
and load is given by the
CC
following equation:
2
2V
CC
P
=
DISS(MAX)
2
π R
L
If the power dissipation for a given application exceeds
the maximum allowed for a given package, reduce
power dissipation by increasing the ground plane heat-
sinking capability and the size of the traces to the device
(see the Layout and Grounding section). Other methods
for re d uc ing p owe r d is s ip a tion a re to re d uc e V
increase load impedance, decrease ambient tempera-
ture, reduce gain, or reduce input signal.
,
CC
R
R
F
A
= 2 ×
V
IN
Thermal-overload protection limits total power dissipation
in the MAX9716/MAX9717. Thermal protection circuitry
disables the amplifier output stage when the junction
te mp e ra ture e xc e e d s + 160°C. The a mp lifie rs a re
enabled once the junction temperature cools by 15°C. A
pulsing output under continuous thermal-overload condi-
tions results as the device heats and cools.
Substituting 2 x V
equations yields four times the output power due to
doubling of the output voltage:
for V
into the following
OUT(P-P)
OUT(P-P)
V
OUT(P−P)
V
=
RMS
2 2
Fix e d Ga in
The MAX9717B, MAX9717C, and MAX9717D feature
internally fixed gains of 6dB, 9dB, and 12dB, respec-
tively (see the Selector Guide). Fixed gain simplifies
designs, reduces pin count, decreases required foot-
print size, and eliminates external gain-setting resistors.
2
V
RMS
P
=
OUT
R
L
There is no net DC voltage across the load because the
differential outputs are each biased at midsupply. This
e limina te s the ne e d for DC-b loc king c a p a c itors
required for single-ended amplifiers. These capacitors
can be large and expensive, consume board space,
and degrade low-frequency performance.
Resistors R and R shown in the MAX9717B/C/D
IN
F
Typical Operating Circuit are used to achieve each
fixed gain.
10 ______________________________________________________________________________________
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
Ou t p u t -Co u p lin g Ca p a c it o r
The MAX9717 require output-coupling capacitors to
operate in single-ended (headphone) mode. The out-
BIAS
put-coupling capacitor blocks the DC component of the
amplifier output, preventing DC current from flowing to
the load. The output capacitor and the load impedance
OUT-
IN+
MAX9716
OUT+
form a highpass filter with a -3dB point determined by:
C
IN
R
IN
AUDIO
INPUT
IN-
1
f
=
−3dB
2πR C
L
OUT
R
F
As with the input capacitor, choose C
such that
OUT
f
is well below the lowest frequency of interest.
-3dB
Setting f
too high affects the amplifier’s low-fre -
-3dB
quency response. Load impedance is a concern when
choosing C . Load impedance can vary, changing
Figure 2. Setting the MAX9716/MAX9717A Gain
OUT
the -3dB point of the output filter. A lower impedance
increases the corner frequency, degrading low-fre-
Ad ju s t a b le Ga in
Gain-Setting Resistors
Exte rna l fe e d b a c k re s is tors s e t the g a in of the
quency response. Select C
such that the worst-
OUT
c a s e loa d /C
c omb ina tion yie ld s a n a d e q ua te
OUT
MAX9716 and MAX9717A. Resistors R and R (see
F
IN
response. Select capacitors with low ESR to minimize
resistive losses and optimize power transfer to the load.
Figure 2) set the gain of the amplifier as follows:
⎛
⎞
R
R
Diffe re n t ia l In p u t
The MAX9716 can be configured for a differential input.
The advantage of differential inputs is that any com-
mon-mode noise is attenuated and not passed through
the amplifier. This input improves noise rejection and
provides common-mode rejection (Figure 3). External
c omp one nts s hould b e c los e ly ma tc he d for hig h
CMRR. Figure 4 shows the MAX9716 configured for a
differential input.
F
A
= 2
V
⎜
⎟
⎝
⎠
IN
Where A is the desired voltage gain. Hence, an R of
20kΩ and an R of 20kΩ yields a gain of 2V/V, or 6dB.
R can be either fixed or variable, allowing the use of a
digitally controlled potentiometer to alter the gain under
software control.
V
IN
F
F
The gain of the MAX9717 in a single-ended output
configuration is half the gain when configured as BTL
output. Choose R between 10kΩ and 50kΩ for the
F
COMMON-MODE REJECTION RATIO
MAX9716 and MAX9717A. Gains for the MAX9717B/C/D
are set internally.
vs. FREQUENCY
0
V
= 200mV
P-P
RIPPLE
Input Filter
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
R = 8Ω
L
C
and R form a highpass filter that removes the DC
IN
IN
C
= 1µF
BIAS
bias from an incoming signal. The AC-coupling capaci-
tor allows the amplifier to bias the signal to an optimal
DC level. Assuming zero-source impedance, the -3dB
point of the highpass filter is:
1
f
=
−3dB
2πR C
IN IN
Se tting f
too hig h a ffe c ts the low-fre q ue nc y
-3d B
re s p ons e of the a mp lifie r. Us e c a p a c itors with
dielectrics that have low-voltage coefficients, such as
tantalum or aluminum electrolytic. Capacitors with high-
voltage coefficients, such as ceramics, can increase
distortion at low frequencies.
10
100
1k
FREQUENCY (Hz)
10k
100k
Figure 3. CMRR with Differential Input
______________________________________________________________________________________ 11
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
R
F
20kΩ
V
CC
220pF
V
CC
ON
CLICKLESS/POPLESS
SHDN
OUT-
OFF
SHUTDOWN
CONTROL
BIAS
C
BIAS
20kΩ
C
IN
R
20kΩ
IN
0.33µF
AUDIO
INPUT
IN+
IN-
20kΩ
OUT+
GND
C
IN
R
20kΩ
IN
0.33µF
AUDIO
INPUT
MAX9716
R
F
20kΩ
220pF
VALUES SHOWN FOR 0dB GAIN.
Figure 4. MAX9716 Differential Input
BIAS Ca p a c it o r
BIAS is the output of the internally-generated V /2 bias
La yo u t a n d Gro u n d in g
Proper PC board layout and grounding is essential for
op timizing p e rforma nc e . Us e la rg e tra c e s for the
power-supply inputs and amplifier outputs to minimize
losses due to parasitic trace resistance. Large traces
also aid in moving heat away from the package. Proper
grounding improves audio performance and prevents
digital switching noise from coupling into the audio signal.
CC
voltage. The BIAS bypass capacitor, C
, improves the
BIAS
power-supply rejection ratio by reducing power supply
and other noise sources at the common-mode bias node.
C
also generates the clickless/popless startup DC
BIAS
bias waveform for the speaker amplifiers. Bypass BIAS
with a 1µF c a p a c itor to GND. La rg e r C va lue s
BIAS
improve PSRR but slow down t
external loads to BIAS.
time. Do not connect
ON
The MAX9716/MAX9717 TDFN and µMAX packages
feature exposed thermal pads on their undersides. This
pad lowers the thermal resistance of the package by
providing a direct-heat conduction path from the die to
the printed circuit board. Connect the exposed pad to
the ground plane using multiple vias, if required.
S u p p ly Byp a s s in g
Proper power-supply bypassing ensures low-noise,
low-distortion performance. Connect a 1µF ceramic
c a p a c itor from V
to GND. Ad d a d d itiona l b ulk
CC
capacitance as required by the application. Connect
the bypass capacitor as close to the device as possible.
12 ______________________________________________________________________________________
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
UCS P Ap p lic a t io n s In fo rm a t io n
Ord e rin g In fo rm a t io n (c o n t in u e d )
For the latest application details on UCSP construction,
dimensions, tape carrier information, printed circuit board
techniques, bump-pad layout, and recommended reflow
temperature profile, as well as the latest information on
reliability testing results, refer to the application note,
“UCSP—A Wafer-Level Chip-Scale Package” available
on Maxim’s web site at http://www.maxim-ic.com/ucsp.
PIN-
PACKAGE
GAIN
(dB)
PART
TEMP RANGE
MAX9717AEBL-T* -40°C to +85°C
3 x 3 UCSP
Adj.
Adj.
Adj.
6
MAX9717AETA
MAX9717AEUA
-40°C to +85°C
-40°C to +85°C
8 TDFN-EP**
8 µMAX-EP**
3 x 3 UCSP
MAX9717BEBL-T* -40°C to +85°C
MAX9717BETA
MAX9717BEUA
-40°C to +85°C
-40°C to +85°C
8 TDFN-EP**
8 µMAX-EP**
3 x 3 UCSP
6
UCS P Ma rk in g In fo rm a t io n
Pin A1 Bump Indicator
6
MAX9717CEBL-T* -40°C to +85°C
9
AAA: Product ID code
XXX: Lot Code
AAA
XXX
MAX9717CETA
MAX9717CEUA
-40°C to +85°C
-40°C to +85°C
8 TDFN-EP**
8 µMAX-EP**
3 x 3 UCSP
9
9
MAX9717DEBL-T* -40°C to +85°C
12
12
12
MAX9717DETA
MAX9717DEUA
-40°C to +85°C
-40°C to +85°C
8 TDFN-EP**
8 µMAX-EP**
*Future product—contact factory for availability.
**EP = Exposed paddle.
S e le c t o r Gu id e
PART
MAX9716
BTL/SE INPUT
GAIN (dB)
—
√
Adjustable
MAX9717A
MAX9717B
MAX9717C
MAX9717D
Adjustable
√
6
9
√
√
12
Ch ip In fo rm a t io n
TRANSISTOR COUNT: 4877
PROCESS: BiCMOS
______________________________________________________________________________________ 13
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
P in Co n fig u ra t io n s
TOP VIEW
SHDN
BIAS
1
2
3
4
8
7
6
5
OUT-
GND
SHDN
BIAS
IN+
1
2
3
4
8
7
6
5
OUT-
GND
MAX9717
MAX9716
BTL/SE
IN-
V
CC
V
CC
OUT+
IN-
OUT+
µMAX
µMAX
MAX9716
MAX9717
TOP VIEW
(BUMPS ON BOTTOM)
1
2
3
1
2
3
A
B
C
IN-
OUT+
GND
IN+
A
B
C
IN-
OUT+ BTL/SE
GND
BIAS
V
CC
GND
BIAS
GND
V
CC
OUT-
SHDN
OUT-
SHDN
UCSP
(1.5mm x 1.5mm)
UCSP
(1.5mm x 1.5mm)
SHDN
1
2
3
4
8
OUT-
GND
SHDN
BIAS
1
8
7
6
5
OUT-
GND
BIAS
IN+
IN-
7
6
5
2
3
4
MAX9716
MAX9717
V
CC
BTL/SE
IN-
V
CC
OUT+
OUT+
TDFN
TDFN
(3mm x 3mm x 0.8mm)
(3mm x 3mm x 0.8mm)
14 ______________________________________________________________________________________
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
Fu n c t io n a l Dia g ra m s /Typ ic a l Op e ra t in g Circ u it s
V
CC
1µF
V
CC
ON
CLICKLESS/POPLESS
SHUTDOWN
SHDN
OUT-
OFF
CONTROL
BIAS
C
BIAS
1µF
20kΩ
IN+
IN-
20kΩ
OUT+
GND
C
IN
R
20kΩ
IN
0.33µF
AUDIO
INPUT
MAX9716
R
F
40kΩ
VALUES SHOWN FOR 12dB GAIN.
V
CC
1µF
V
CC
ON
CLICKLESS/POPLESS
SHUTDOWN
SHDN
OUT-
OFF
CONTROL
BIAS
C
BIAS
1µF
1kΩ
20kΩ
C
OUT
100µF
20kΩ
OUT+
GND
C
IN
R
20kΩ
IN
0.33µF
AUDIO
INPUT
IN-
BTL/SE
100kΩ
MAX9717A
100kΩ
V
CC
R
F
VALUES SHOWN FOR BTL 12dB GAIN,
HEADPHONE 6dB GAIN.
40kΩ
______________________________________________________________________________________ 15
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
Fu n c t io n a l Dia g ra m s /Typ ic a l Op e ra t in g Circ u it s (c o n t in u e d )
V
CC
1µF
V
CC
ON
CLICKLESS/POPLESS
SHUTDOWN
SHDN
OUT-
OFF
CONTROL
BIAS
C
BIAS
1µF
1kΩ
20kΩ
C
OUT
100µF
IN+
20kΩ
OUT+
GND
C
IN
R
20kΩ
IN
0.33µF
AUDIO
INPUT
IN-
BTL/SE
100kΩ
R
F
100kΩ
V
CC
MAX9717B
MAX9717C
MAX9717D
16 ______________________________________________________________________________________
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
P a c k a g e In fo rm a t io n
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
______________________________________________________________________________________ 17
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
P a c k a g e In fo rm a t io n (c o n t in u e d )
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
L
A
D2
D
A2
PIN 1 ID
1
N
1
C0.35
b
[(N/2)-1] x e
REF.
E
E2
PIN 1
INDEX
AREA
DETAIL A
e
k
A1
C
L
C
L
L
L
e
e
A
DALLAS
SEMICONDUCTOR
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, 6, 8 & 10L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
APPROVAL
DOCUMENT CONTROL NO.
REV.
NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY
1
2
21-0137
D
COMMON DIMENSIONS
SYMBOL
MIN.
0.70
2.90
2.90
0.00
0.20
MAX.
A
0.80
3.10
3.10
0.05
0.40
D
E
A1
L
k
0.25 MIN.
0.20 REF.
A2
PACKAGE VARIATIONS
PKG. CODE
T633-1
N
6
D2
E2
e
JEDEC SPEC
b
[(N/2)-1] x e
1.90 REF
1.95 REF
2.00 REF
1.50±0.10 2.30±0.10 0.95 BSC
1.50±0.10 2.30±0.10 0.65 BSC
MO229 / WEEA
MO229 / WEEC
0.40±0.05
0.30±0.05
T833-1
8
T1033-1
10
1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05
DALLAS
SEMICONDUCTOR
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, 6, 8 & 10L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
APPROVAL
DOCUMENT CONTROL NO.
REV.
2
2
21-0137
D
18 ______________________________________________________________________________________
Lo w -Co s t , Mo n o , 1 .4 W BTL Au d io P o w e r
Am p lifie rs
P a c k a g e In fo rm a t io n (c o n t in u e d )
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
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