Typical operating characteristics (continued), Headphone amplifier – Rainbow Electronics MAX9877 User Manual
Page 12
MAX9877
Low RF Susceptibility, Mono Audio
Subsystem with DirectDrive Headphone Amplifier
12
______________________________________________________________________________________
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.)
HEADPHONE AMPLIFIER
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9877 toc36
FREQUENCY (Hz)
THD+N (%)
0
0.001
0.01
0.1
10
100
1k
10k
100k
V
DD
= PV
DD
= 3.7V
R
HP
= 32
Ω
P
OUT
= 10mW
P
OUT
= 20mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9877 toc37
FREQUENCY (Hz)
THD+N (%)
1
0.001
0.01
0.1
10
100
1k
10k
100k
V
DD
= PV
DD
= 3.7V
R
HP
= 16
Ω
P
OUT
= 20mW
P
OUT
= 40mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9877 toc38
FREQUENCY (Hz)
THD+N (%)
1
0.001
0.01
0.1
10
100
1k
10k
100k
V
DD
= PV
DD
= 3V
R
HP
= 32
Ω
P
OUT
= 10mW
P
OUT
= 20mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9877 toc39
FREQUENCY (Hz)
THD+N (%)
1
0.001
0.01
0.1
10
100
1k
10k
100k
V
DD
= PV
DD
= 3V
R
HP
= 16
Ω
P
OUT
= 15mW
P
OUT
= 30mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9877 toc40
OUTPUT POWER (mW)
THD+N (%)
30
20
10
0.01
0.1
1
10
0.001
0
40
V
DD
= PV
DD
= 3.7V
R
HP
= 32
Ω
f
IN
= 20Hz
f
IN
= 1kHz f
IN
= 6kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9877 toc41
OUTPUT POWER (mW)
THD+N (%)
0.01
0.1
1
10
0.001
0
20
40
60
10
30
50
70
V
DD
= PV
DD
= 3.7V
R
HP
= 16
Ω
f
IN
= 20Hz AND 1kHz
f
IN
= 6kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9877 toc42
OUTPUT POWER (mW)
THD+N (%)
30
20
10
0.01
0.1
1
10
0.001
0
40
V
DD
= PV
DD
= 3V
R
HP
= 32
Ω
f
IN
= 20Hz
f
IN
= 1kHz
f
IN
= 6kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9877 toc43
OUTPUT POWER (mW)
THD+N (%)
0.01
0.1
1
10
0.001
0
20
40
10
30
50
60
V
DD
= PV
DD
= 3V
R
HP
= 16
Ω
f
IN
= 20Hz AND 1kHz
f
IN
= 6kHz