Typical operating characteristics (continued), Speaker amplifier – Rainbow Electronics MAX9877 User Manual
Page 8
MAX9877
Low RF Susceptibility, Mono Audio
Subsystem with DirectDrive Headphone Amplifier
8
_______________________________________________________________________________________
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9877 toc10
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
1
0.1
0.01
10
100k
V
DD
= PV
DD
= 3.7V
P
OUT
= 200mW
Z
SPK
= 8
Ω + 68μH
f
OSC
= 700kHz
f
OSC
= 1176kHz
f
OSC
= 1100kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9877 toc11
OUTPUT POWER (W)
THD+N (%)
1.5
1.0
0.5
0.1
1
10
0.01
0
2.0
f
IN
= 20Hz
f
IN
= 1kHz
f
IN
= 6kHz
V
DD
= PV
DD
= 5V
Z
SPK
= 8
Ω + 68μH
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9877 toc12
OUTPUT POWER (W)
THD+N (%)
1.5
0.1
1
10
0.01
0
2.5
1.0
3.0
0.5
2.0
V
DD
= PV
DD
= 5V
Z
SPK
= 4
Ω + 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 toc13
OUTPUT POWER (mW)
THD+N (%)
0.1
1
10
0.01
0
1000
600
400
800
200
f
IN
= 6kHz
f
IN
= 20Hz
f
IN
= 1kHz
V
DD
= PV
DD
= 3.7V
Z
SPK
= 8
Ω + 68μH
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.)
SPEAKER AMPLIFIER
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9877 toc06
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.1
1
10
0.01
10
100k
V
DD
= PV
DD
= 3.7V
Z
SPK
= 8
Ω + 68μH
P
OUT
= 200mW
P
OUT
= 675mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9877 toc07
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.1
1
10
0.01
10
100k
V
DD
= PV
DD
= 3.7V
Z
SPK
= 4
Ω + 33μH
DASHED LINES ARE LIMITED
BY THE ABS. MAX RATINGS
P
OUT
= 1100mW
P
OUT
= 650mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9877 toc08
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.1
1
10
0.01
10
100k
P
OUT
= 425mW
P
OUT
= 200mW
V
DD
= PV
DD
= 3V
Z
SPK
= 8
Ω + 68μH
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9877 toc09
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.1
1
10
0.01
10
100k
P
OUT
= 700mW
P
OUT
= 250mW
V
DD
= PV
DD
= 3V
Z
SPK
= 4
Ω + 33μH