Owner's manual
MAX9877
EFFICIENCY
vs. OUTPUT POWER
MAX9877 toc19
OUTPUT POWER (W)
EFFICIENCY (%)
1.5
100
0
50
60
10
80
30
70
20
90
40
0 3.00.5 2.01.0 2.5
V
DD
= PV
DD
= 5V
f
IN
= 1kHz
DASHED LINES ARE LIMITED
BY THE ABS. MAX RATINGS
Z
SPK
= 8Ω + 68μH
Z
SPK
= 4Ω + 33μH
EFFICIENCY
vs. OUTPUT POWER
MAX9877 toc20
OUTPUT POWER (W)
EFFICIENCY (%)
100
0
50
60
10
80
30
70
20
90
40
0 2.01.51.00.5
V
DD
= PV
DD
= 3.7V
f
IN
= 1kHz
DASHED LINES ARE LIMITED
BY THE ABS. MAX RATINGS
Z
SPK
= 8Ω + 68μH
Z
SPK
= 4Ω + 33μH
EFFICIENCY
vs. OUTPUT POWER
MAX9877 toc21
OUTPUT POWER (mW)
EFFICIENCY (%)
100
0
50
60
10
80
30
70
20
90
40
0 1000600200 800400
V
DD
= PV
DD
= 3.7V
f
IN
= 1kHz
Z
SPK
= 8Ω + 68μH
f
OSC
= 700kHz
f
OSC
= 1176kHz AND 1100kHz
Typical Operating Characteristics (continued)
(V
DD
= PV
DD
= 3.7V, V
GND
= V
PGND
= 0V. Single-ended inputs, preamp gain = 0dB, volume controls = 0dB, OSC = 00, BYPASS =
0, 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 DirectDrive Headphone Amplifier
_______________________________________________________________________________________ 9
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9877 toc14
OUTPUT POWER (W)
THD+N (%)
0.1
1
10
0.01
0 1.51.00.5
V
DD
= PV
DD
= 3.7V
Z
SPK
= 4Ω + 33μH
DASHED LINES ARE LIMITED
BY THE ABS. MAX RATINGS
f
IN
= 6kHz
f
IN
= 20Hz
f
IN
= 1kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9877 toc15
OUTPUT POWER (mW)
THD+N (%)
0.1
1
10
0.01
0 600400200
f
IN
= 6kHz
f
IN
= 20Hz
f
IN
= 1kHz
V
DD
= PV
DD
= 3V
Z
SPK
= 8Ω + 68μH
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9877 toc16
OUTPUT POWER (W)
THD+N (%)
0.1
1
10
0.01
0 1.20.80.4 1.00.60.2
V
DD
= PV
DD
= 3V
Z
SPK
= 4Ω + 33μH
DASHED LINES ARE LIMITED
BY THE ABS. MAX RATINGS
f
IN
= 6kHz
f
IN
= 20Hz
f
IN
= 1kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9877 toc17
OUTPUT POWER (mW)
THD+N (%)
600400200
1
0.01
0.1
0 800
V
DD
= PV
DD
= 3.7V
f
IN
= 1kHz
Z
SPK
= 8Ω + 68μH
f
OSC
= 1176kHz SSM
f
OSC
= 700kHz
f
OSC
= 1100kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9877 toc18
OUTPUT POWER (mW)
THD+N (%)
600400200
1
0.01
0.1
0 800
V
DD
= PV
DD
= 3.7V
f
IN
= 6kHz
Z
SPK
= 8Ω + 68μH
f
OSC
= 1176kHz SSM
f
OSC
= 700kHz
f
OSC
= 1100kHz