
MAX9875
Typical Operating Characteristics (continued)
(VDD = VPVDD = 3.7V, VGND = VPGND = 0V. Single-ended inputs, preamp gain = 0dB, volume controls = 0dB, OSC = 00, SHDN = 1.
Speaker loads (ZSPK) connected between OUT+ and OUT-. Headphone loads (RHP) connected from HPL or HPR to GND. ZSPK =
∞, RHP = ∞. C1 = C2 = CBIAS = 1F. TA = +25°C, unless otherwise noted.)
Low RF Susceptibility, Mono Audio
Subsystem with DirectDrive Headphone Amplifier
______________________________________________________________________________________
13
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9875
toc46
SUPPLY VOLTAGE (V)
OUTPUT
POWER
(mW)
5.0
4.5
4.0
3.5
3.0
50
0
10
20
30
40
45
5
15
25
35
2.5
5.5
fIN = 1kHz
RHP = 32
10% THD+N
1% THD+N
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9875
toc47
SUPPLY VOLTAGE (V)
OUTPUT
POWER
(mW)
5.0
4.5
4.0
3.5
3.0
100
0
20
40
60
80
90
10
30
50
70
2.5
5.5
fIN = 1kHz
RHP = 16
10% THD+N
1% THD+N
OUTPUT POWER
vs. LOAD RESISTANCE
MAX9875
toc48
LOAD RESISTANCE ()
OUTPUT
POWER
(mW)
100
0
20
40
60
80
90
10
30
50
70
10
40
70
100
20
50
80
30
60
90
VDD = VPVDD = 3.7V
fIN = 1kHz
10% THD+N
1% THD+N
OUTPUT POWER
vs. LOAD RESISTANCE
MAX9875
toc49
LOAD RESISTANCE ()
OUTPUT
POWER
(mW)
100
0
20
40
60
80
90
10
30
50
70
10
40
70
100
20
50
80
30
60
90
VDD = VPVDD = 3V
fIN = 1kHz
10% THD+N
1% THD+N
OUTPUT POWER
vs. LOAD RESISTANCE
MAX9875
toc50
LOAD RESISTANCE ()
OUTPUT
POWER
(mW)
100
0
20
40
60
80
90
10
30
50
70
10
40
70
100
20
50
80
30
60
90
VDD = VPVDD = 3V
OSC = 10
fIN = 1kHz
1% THD+N
C1 = C2 = 2.2F
C1 = C2 = 0.47F
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9875
toc51
FREQUENCY (Hz)
PSRR
(dB)
0
-120
-80
-60
-40
-20
-10
-90
-100
-110
-70
-50
-30
10
100
1k
10k
100k
VDD = VPVDD = 3.7V
VRIPPLE = 100mVP-P
RHP = 32
INPUTS AC-COUPLED TO GND
HPR
HPL
POWER DISSIPATION
vs. OUTPUT POWER
MAX9875
toc44
OUTPUT POWER (mW)
POWER
DISSIPATION
(mW)
350
0
250
50
150
300
100
200
0150
100
50
VDD = VPVDD = 3.7V
fIN = 1kHz
POUT = PHPL + PHPR
RHP = 32
RHP = 16
POWER DISSIPATION
vs. OUTPUT POWER
MAX9875
toc45
OUTPUT POWER (mW)
POWER
DISSIPATION
(mW)
250
0
50
150
100
200
0
150
100
50
VDD = VPVDD = 3V
fIN = 1kHz
POUT = PHPL + PHPR
RHP = 32
RHP = 16