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MAX9720BEUE+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21
MAX9720
50mW, DirectDrive, Stereo Headphone
Amplifier with SmartSense and Shutdown
_______________________________________________________________________________________ 7
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9720 toc28
OUTPUT POWER (mW)
THD+N (%)
40302010
0.01
0.1
1
10
100
0.001
050
OUTPUTS
IN PHASE
OUTPUTS
OUT OF
PHASE
V
DD
= 1.8V
A
V
= -1.41V/V
f = 1kHz
R
L
= 16Ω
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9720 toc29
OUTPUT POWER (mW)
THD+N (%)
40302010
0.01
0.1
1
10
100
0.001
050
OUTPUTS
IN PHASE
OUTPUTS
OUT OF
PHASE
V
DD
= 1.8V
A
V
= -1.41V/V
f = 10kHz
R
L
= 16Ω
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9720 toc30
OUTPUT POWER (mW)
THD+N (%)
25155302010
0.01
0.1
1
10
100
0.001
04035
OUTPUTS
IN PHASE
OUTPUTS
OUT OF
PHASE
V
DD
= 1.8V
A
V
= -1.41V/V
f = 20Hz
R
L
= 32Ω
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9720 toc31
OUTPUT POWER (mW)
THD+N (%)
25155302010
0.01
0.1
1
10
100
0.001
04035
OUTPUTS
IN PHASE
OUTPUTS
OUT OF
PHASE
V
DD
= 1.8V
A
V
= -1.41V/V
f = 1kHz
R
L
= 32Ω
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9720 toc32
OUTPUT POWER (mW)
THD+N (%)
25155302010
0.01
0.1
1
10
100
0.001
04035
OUTPUTS
IN PHASE
OUTPUTS
OUT OF
PHASE
V
DD
= 1.8V
A
V
= -1.41V/V
f = 10kHz
R
L
= 32Ω
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX9720 toc33
SUPPLY VOLTAGE (V)
OUTPUT POWER (mW)
3.33.02.72.42.1
20
40
60
80
100
120
140
160
180
200
0
1.8 3.6
f
IN
= 1kHz
R
L
= 16Ω
THD+N = 1%
STEREO
OUT OF
PHASE
STEREO
IN PHASE
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX9720 toc34
SUPPLY VOLTAGE (V)
OUTPUT POWER (mW)
3.33.02.72.42.1
20
40
60
80
100
120
140
160
180
200
0
1.8 3.6
f
IN
= 1kHz
R
L
= 16Ω
THD+N = 10%
STEREO
OUT OF
PHASE
STEREO
IN PHASE
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX9720 toc35
SUPPLY VOLTAGE (V)
OUTPUT POWER (mW)
3.33.02.72.42.1
20
40
60
80
100
120
140
160
0
1.8 3.6
f
IN
= 1kHz
R
L
= 32Ω
THD+N = 1%
STEREO
OUT OF
PHASE
STEREO
IN PHASE
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX9720 toc36
SUPPLY VOLTAGE (V)
OUTPUT POWER (mW)
3.33.02.72.42.1
20
40
60
80
100
120
140
160
0
1.8 3.6
f
IN
= 1kHz
R
L
= 32Ω
THD+N = 10%
STEREO
OUT OF
PHASE
STEREO
IN PHASE
Typical Operating Characteristics (continued)
(V
DD
= 3V, THD+N bandwidth = 22Hz to 22kHz, MODE1 = MODE2 = V
DD
.)
MAX9720
50mW, DirectDrive, Stereo Headphone
Amplifier with SmartSense and Shutdown
8 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
DD
= 3V, THD+N bandwidth = 22Hz to 22kHz, MODE1 = MODE2 = V
DD
.)
OUTPUT POWER vs. LOAD RESISTANCE
MAX9720 toc37
LOAD RESISTANCE (Ω)
OUTPUT POWER (mW)
20
40
60
80
100
120
140
160
0
10 100
f = 1kHz
THD+N = 1%
INPUTS
OUT OF
PHASE
INPUTS
IN PHASE
OUTPUT POWER vs. LOAD RESISTANCE
MAX9720 toc38
LOAD RESISTANCE (Ω)
OUTPUT POWER (mW)
20
40
60
80
100
120
140
160
0
10 100
f = 1kHz
THD+N = 10%
INPUTS
OUT OF
PHASE
INPUTS
IN PHASE
OUTPUT POWER vs. LOAD RESISTANCE
MAX9720 toc39
LOAD RESISTANCE (Ω)
OUTPUT POWER (mW)
5
10
15
20
25
30
35
40
0
10 100
V
DD
= 1.8V
f = 1kHz
THD+N = 1%
INPUTS
OUT OF
PHASE
INPUTS
IN PHASE
OUTPUT POWER vs. LOAD RESISTANCE
MAX9720 toc40
LOAD RESISTANCE (Ω)
OUTPUT POWER (mW)
5
10
15
20
25
30
35
40
0
10 100
V
DD
= 1.8V
f = 1kHz
THD+N = 10%
INPUTS
OUT OF
PHASE
INPUTS
IN PHASE
POWER DISSIPATION vs. OUTPUT POWER
MAX9720 toc41
OUTPUT POWER (mW)
POWER DISSIPATION (mW)
20015010050
50
100
150
200
250
300
350
0
0 250
R
L
= 16Ω
R
L
= 32Ω
V
DD
= 3V
f = 1kHz
P
OUT
= P
OUTL
+ P
OUTR
POWER DISSIPATION vs. OUTPUT POWER
MAX9720 toc42
OUTPUT POWER (mW)
POWER DISSIPATION (mW)
604020
25
50
75
100
125
0
080
R
L
= 16Ω
R
L
= 32Ω
V
DD
= 1.8V
f = 1kHz
P
OUT
= P
OUTL
+ P
OUTR
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9720 toc43
FREQUENCY (Hz)
PSRR (dB)
10k1k100
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-120
10 100k
V
DD
= 3V
V
RIPPLE
= 200mV
P-P
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9720 toc44
FREQUENCY (Hz)
PSRR (dB)
10k1k100
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100k
V
DD
= 1.8V
V
RIPPLE
= 200mV
P-P
CROSSTALK vs. FREQUENCY
MAX9720 toc45
FREQUENCY (Hz)
CROSSTALK (dB)
10k1k100
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-120
10 100k
V
DD
= 3V
R
L
= 32Ω
V
IN
= 200mV
P-P
RIGHT-TO-LEFT
CHANNEL
LEFT-TO-RIGHT
CHANNEL
MAX9720
50mW, DirectDrive, Stereo Headphone
Amplifier with SmartSense and Shutdown
_______________________________________________________________________________________ 9
CROSSTALK vs. FREQUENCY
MAX9720 toc46
FREQUENCY (Hz)
CROSSTALK (dB)
10k1k100
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-120
10 100k
V
DD
= 1.8V
R
L
= 32Ω
V
IN
= 200mV
P-P
RIGHT-TO-LEFT
CHANNEL
LEFT-TO-RIGHT
CHANNEL
GAIN FLATNESS vs. FREQUENCY
MAX9720 toc47
FREQUENCY (Hz)
GAIN (dB)
1k1001010.1
-4
-3
-2
-1
0
1
2
3
4
5
-5
0.01 10k
A
V
= -1V/V
CHARGE-PUMP OUTPUT IMPEDANCE
vs. SUPPLY VOLTAGE
MAx9720 toc48
SUPPLY VOLTAGE (V)
OUTPUT IMPEDANCE (Ω)
3.33.02.72.42.1
2
4
6
8
10
12
14
0
1.8 3.6
I
LOAD
= 10mA
0.47µF
OUTPUT POWER vs. LOAD RESISTANCE
AND CHARGE-PUMP CAPACITOR SIZE
MAx9720 toc49
LOAD RESISTANCE (Ω)
OUTPUT POWER (mW)
403020
10
20
30
40
50
60
0
10 50
2.2µF
1µF
f
IN
= 1kHz
THD+N = 1%
OUTPUTS
IN PHASE
OUTPUT SPECTRUM vs. FREQUENCY
MAX9720 toc50
FREQUENCY (Hz)
OUTPUT SPECTRUM (dB)
10k1k
-100
-80
-60
-40
-20
0
-120
100 100k
V
IN
= 1V
P-P
R
L
= 32Ω
f
IN
= 1kHz
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX9720 toc51
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
3.33.02.72.42.1
1
2
3
4
5
6
0
1.8 3.6
STEREO MODE
MONO MODE
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9720 toc52
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
3.33.02.72.42.1
1
2
3
4
5
6
7
8
9
0
1.8 3.6
EXITING SHUTDOWN
MAX9720 toc53
400µs/div
OUT_
500mV/div
3V
0V
f
IN
= 1kHz
R
L
= 32Ω
MODE1 AND
MODE2
POWER-UP/DOWN WAVEFORM
MAX9720 toc54
200ms/div
FFT: 25Hz/div
OUT_FFT
OUT_
20dB/div
3V
0V
10mV/div
V
IN
= GND
R
L
= 32Ω
V
DD
100dB
Typical Operating Characteristics (continued)
(V
DD
= 3V, THD+N bandwidth = 22Hz to 22kHz, MODE1 = MODE2 = V
DD
.)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21

MAX9720BEUE+

Mfr. #:
Buy MAX9720BEUE+
Manufacturer:
Maxim Integrated
Description:
IC AMP AUDIO .05W STER 16TSSOP
Lifecycle:
New from this manufacturer.
Delivery:
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