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MAX9875ERP+T
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P30
MAX9875
Low RF Susceptibility
, Mono Audio
Subsystem with Dir
ectDrive Headphone Amplifier
10
______________________________________________________________________________________
T
ypical Operating Characteristics (continued)
(V
DD
= V
PV
DD
= 3.7V, V
GND
= V
PGND
= 0V. Single-ended inputs, preamp gain = 0dB, volume controls = 0dB, OSC = 00,
SHDN
= 1.
Speaker loads (Z
SPK
) connected between OUT+ and OUT-. Headphone loads (R
HP
) connected from HPL or HPR to GND. Z
SPK
=
∞
, R
HP
=
∞
. C1 = C2 = C
BIAS
= 1µF. T
A
= +25°C, unless otherwise noted.)
IN-BAND OUTPUT SPECTRUM
MAX9875 toc28
FREQUENCY (kHz)
AMPLITUDE (dBV)
15
10
5
0
-140
-80
-40
-120
-20
-60
-100
02
0
f
OSC
= 1100kHz
f
IN
= 1kHz
IN-BAND OUTPUT SPECTRUM
MAX9875 toc29
FREQUENCY (kHz)
AMPLITUDE (dBV)
15
10
5
0
-140
-80
-40
-120
-20
-60
-100
02
0
f
OSC
= 700kHz
f
IN
= 1kHz
EFFICIENCY
vs. OUTPUT POWER
MAX9875 toc22
OUTPUT POWER (mW)
EFFICIENCY (%)
100
0
50
60
10
80
30
70
20
90
40
01
0
0
0
600
400
800
200
V
DD
= V
PVDD
= 3V
f
IN
= 1kHz
DASHED LINES ARE LIMITED
BY THE ABS. MAX RATINGS
Z
SPK
= 8
Ω
+ 68
µ
H
Z
SPK
= 4
Ω
+ 33
µ
H
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9875 toc23
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
5.0
4.5
4.0
3.5
3.0
2.0
2.5
0.5
1.0
1.5
3.0
3.5
0
2.5
5.5
10% THD+N
1% THD+N
V
DD
= V
PVDD
Z
SPK
= 4
Ω
+ 33
µ
H
DASHED LINES ARE LIMITED
BY THE ABS. MAX RATINGS
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9875 toc24
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
5.0
4.5
4.0
3.5
3.0
2.0
0.2
0.8
0.6
1.2
1.0
1.6
0.4
1.8
1.4
0
2.5
5.5
V
DD
= V
PVDD
Z
SPK
= 8
Ω
+ 68
µ
H
10% THD+N
1% THD+N
OUTPUT POWER
vs. LOAD RESISTANCE
MAX9875 toc25
LOAD RESISTANCE (
Ω
)
OUTPUT POWER (W)
1.8
0.2
0.8
0.6
1.2
1.0
1.6
0.4
1.4
0
01
0
0
70
40
10
80
50
20
90
60
30
V
DD
= V
PVDD
= 3.7V
f
IN
= 1kHz
Z
SPK
= LOAD + 68
µ
H
10% THD+N
1% THD+N
OUTPUT POWER
vs. LOAD RESISTANCE
MAX9875 toc26
LOAD RESISTANCE (
Ω
)
OUTPUT POWER (W)
1.2
0.2
0.8
0.6
1.0
0.4
0
01
0
0
70
40
10
80
50
20
90
60
30
V
DD
= V
PVDD
= 3V
f
IN
= 1kHz
Z
SPK
= LOAD + 68
µ
H
10% THD+N
1% THD+N
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9875 toc27
FREQUENCY (Hz)
PSRR (dB)
10k
1k
100
-90
-70
-60
-40
-30
-10
-80
-50
-20
0
-100
10
100k
V
DD
= V
PVDD
= 3.7V
V
RIPPLE
= 100mV
P-P
INPUTS AC-COUPLED TO GND
MAX9875
T
ypical Operating Characteristics (continued)
(V
DD
= V
PV
DD
= 3.7V, V
GND
= V
PGND
= 0V. Single-ended inputs, preamp gain = 0dB, volume controls = 0dB, OSC = 00,
SHDN
= 1.
Speaker loads (Z
SPK
) connected between OUT+ and OUT-. Headphone loads (R
HP
) connected from HPL or HPR to GND. Z
SPK
=
∞
, R
HP
=
∞
. C1 = C2 = C
BIAS
= 1µF. T
A
= +25°C, unless otherwise noted.)
Low RF Susceptibility
, Mono Audio
Subsystem with Dir
ectDrive Headphone Amplifier
______________________________________________________________________________________
11
IN-BAND OUTPUT SPECTRUM
MAX9875 toc30
FREQUENCY (kHz)
AMPLITUDE (dBV)
15
10
5
0
-140
-80
-40
-120
-20
-60
-100
02
0
f
OSC
= 1176kHz
f
IN
= 1kHz
WIDEBAND OUTPUT SPECTRUM
MAX9875 toc31
FREQUENCY (MHz)
AMPLITUDE (dBV)
0
-70
-40
-50
-20
-80
-60
-90
-30
-10
-100
0.1
10
100
1
f
OSC
= 1100kHz
INPUTS AC-COUPLED TO GND
WIDEBAND OUTPUT SPECTRUM
MAX9875 toc32
FREQUENCY (MHz)
AMPLITUDE (dBV)
0
-70
-40
-50
-20
-80
-60
-90
-30
-10
-100
0.1
10
100
1
f
OSC
= 700kHz
INPUTS AC-COUPLED TO GND
WIDEBAND OUTPUT SPECTRUM
MAX9875 toc33
FREQUENCY (MHz)
AMPLITUDE (dBV)
0
-70
-40
-50
-20
-80
-60
-90
-30
-10
-100
0.1
10
100
1
f
OSC
= 1176kHz
INPUTS AC-COUPLED TO GND
HARDWARE SHUTDOWN RESPONSE
MAX9875 toc34
V
BIAS
500mV/div
20ms/div
OUT+ - OUT-
1V/div
SOFTWARE SHUTDOWN
ON- AND OFF-RESPONSE
MAX9875 toc35
V
SDA
2V/div
20ms/div
OUT+ - OUT-
1V/div
MAX9875
Low RF Susceptibility
, Mono Audio
Subsystem with Dir
ectDrive Headphone Amplifier
12
______________________________________________________________________________________
T
ypical Operating Characteristics (continued)
(V
DD
= V
PV
DD
= 3.7V, V
GND
= V
PGND
= 0V. Single-ended inputs, preamp gain = 0dB, volume controls = 0dB, OSC = 00,
SHDN
= 1.
Speaker loads (Z
SPK
) connected between OUT+ and OUT-. Headphone loads (R
HP
) connected from HPL or HPR to GND. Z
SPK
=
∞
, R
HP
=
∞
. C1 = C2 = C
BIAS
= 1µF. T
A
= +25°C, unless otherwise noted.)
HEADPHONE AMPLIFIER
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9875 toc36
FREQUENCY (Hz)
THD+N (%)
0
0.001
0.01
0.1
10
100
1k
10k
100k
V
DD
= V
PVDD
= 3.7V
R
HP
= 32
Ω
P
OUT
= 10mW
P
OUT
= 20mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9875 toc37
FREQUENCY (Hz)
THD+N (%)
1
0.001
0.01
0.1
10
100
1k
10k
100k
V
DD
= V
PVDD
= 3.7V
R
HP
= 16
Ω
P
OUT
= 20mW
P
OUT
= 40mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9875 toc38
FREQUENCY (Hz)
THD+N (%)
1
0.001
0.01
0.1
10
100
1k
10k
100k
V
DD
= V
PVDD
= 3V
R
HP
= 32
Ω
P
OUT
= 10mW
P
OUT
= 20mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9875 toc39
FREQUENCY (Hz)
THD+N (%)
1
0.001
0.01
0.1
10
100
1k
10k
100k
V
DD
= V
PVDD
= 3V
R
HP
= 16
Ω
P
OUT
= 15mW
P
OUT
= 30mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9875 toc40
OUTPUT POWER (mW)
THD+N (%)
30
20
10
0.01
0.1
1
10
0.001
04
0
V
DD
= V
PVDD
= 3.7V
R
HP
= 32
Ω
f
IN
= 20Hz
f
IN
= 1kHz
f
IN
= 6kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9875 toc41
OUTPUT POWER (mW)
THD+N (%)
0.01
0.1
1
10
0.001
0
2
04
06
0
10
30
50
70
V
DD
= V
PVDD
= 3.7V
R
HP
= 16
Ω
f
IN
= 20Hz AND 1kHz
f
IN
= 6kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9875 toc42
OUTPUT POWER (mW)
THD+N (%)
30
20
10
0.01
0.1
1
10
0.001
04
0
V
DD
= V
PVDD
= 3V
R
HP
= 32
Ω
f
IN
= 20Hz
f
IN
= 1kHz
f
IN
= 6kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9875 toc43
OUTPUT POWER (mW)
THD+N (%)
0.01
0.1
1
10
0.001
02
0
4
0
10
30
50
60
V
DD
= V
PVDD
= 3V
R
HP
= 16
Ω
f
IN
= 20Hz AND 1kHz
f
IN
= 6kHz
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P30
MAX9875ERP+T
Mfr. #:
Buy MAX9875ERP+T
Manufacturer:
Maxim Integrated
Description:
Audio Amplifiers Audio Subsystem w/DirectDrive
Lifecycle:
New from this manufacturer.
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