MAX9879 Maxim Integrated Products, MAX9879 Datasheet - Page 11

• Manufacturer Part Number: MAX9879
• Description: Stereo Class D Audio Subsystem
• Manufacturer: Maxim Integrated Products

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(V
trols = 0dB, BYPASS = 0, SHDN = 1. Speaker loads connected between OUT_+ and OUT_-. Headphone loads connected from HPL
or HPR to GND. R
0.001
0.001
DD
0.01
0.01
0.1
0.1
10
10
1
1
= V
0.01
vs. OUTPUT POWER (HEADPHONE MODE)
TOTAL HARMONIC DISTORTION + NOISE
TOTAL HARMONIC DISTORTION + NOISE
0
vs. FREQUENCY (HEADPHONE MODE)
V
R
V
R
PVDDL
DD
L
DD
L
= 32Ω
= 16Ω
f
f
IN
IN
OUTPUT POWER = 10mW
= 3.0V
= 3.7V
= 1kHz
= 100Hz
20
OUTPUT POWER = 30mW
0.1
= V
OUTPUT POWER (mW)
FREQUENCY (kHz)
SPK
PVDDR
40
______________________________________________________________________________________
2ms/div
= ∞, R
1
f
IN
60
= 3.7V, V
= 6kHz
HP
10
with DirectDrive Headphone Amplifier
= ∞. C1 = C2 = C
80
MAX9879 toc21
CCIO
HEADPHONE AMPLIFIERS (Speaker Disabled)
100
100
= 1.8V, V
SDA
2V/div
SCL
2V/div
OUT+ - OUT-
1V/div
Stereo Class D Audio Subsystem
Typical Operating Characteristics (continued)
0.001
0.001
0.001
BIAS
0.01
GND
0.01
0.01
100
0.1
0.1
0.1
10
10
10
1
1
0.01
0.01
vs. OUTPUT POWER (HEADPHONE MODE)
TOTAL HARMONIC DISTORTION + NOISE
0
TOTAL HARMONIC DISTORTION + NOISE
TOTAL HARMONIC DISTORTION + NOISE
= 1µF. T
= V
vs. FREQUENCY (HEADPHONE MODE)
vs. FREQUENCY (HEADPHONE MODE)
V
R
V
R
V
R
DD
L
OUTPUT POWER = 45mW
DD
L
DD
L
= 32Ω
= 16Ω
= 32Ω
f
IN
PGNDL
= 3.7V
OUTPUT POWER = 20mW
10
= 3.0V
= 3.0V
OUTPUT POWER = 22mW
= 100Hz
f
IN
0.1
0.1
= 1kHz
A
20
OUTPUT POWER (mW)
= +25°C, unless otherwise noted.)
FREQUENCY (kHz)
FREQUENCY (kHz)
= V
OUTPUT POWER = 7mW
30
PGNDR
1
1
40
= 0. Single-ended inputs, preamp = 0dB, volume con-
50
f
IN
10
10
= 6kHz
60
100
100
70
0.001
0.001
0.001
0.01
0.01
0.01
100
0.1
0.1
0.1
10
10
10
1
1
0.01
0.01
vs. OUTPUT POWER (HEADPHONE MODE)
TOTAL HARMONIC DISTORTION + NOISE
0
TOTAL HARMONIC DISTORTION + NOISE
TOTAL HARMONIC DISTORTION + NOISE
vs. FREQUENCY (HEADPHONE NOISE)
vs. FREQUENCY (HEADPHONE MODE)
V
R
V
R
V
R
DD
L
f
DD
L
DD
L
IN
= 16Ω
= 32Ω
= 16Ω
OUTPUT POWER = 40mW
= 100Hz
= 3.7V
= 3.7V
= 3.0V
f
IN
10
OUTPUT POWER = 10mW
= 1kHz
0.1
0.1
f
OUTPUT POWER (mW)
IN
f
IN
FREQUENCY (kHz)
20
FREQUENCY (kHz)
= 6kHz
= 1kHz
30
1
1
f
IN
40
= 6kHz
f
10
IN
10
= 100Hz
50
100
11
100
60