MAX9879 Maxim Integrated Products, MAX9879 Datasheet - Page 10

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

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Stereo Class D Audio Subsystem
with DirectDrive Headphone Amplifier
10
(V
trols = 0dB, BYPASS = 0, SHDN = 1. Speaker loads connected between OUT_+ and OUT_-. Headphone loads connected from HPL
or HPR to GND. R
1000
DD
800
600
400
200
0
______________________________________________________________________________________
= V
1
THD+N = 10%
PVDDL
THD+N = 1%
OUTPUT POWER vs. LOAD
= V
SPK
PVDDR
LOAD (Ω)
-100
-120
-140
-20
-40
-60
-80
= ∞, R
10
0
f = 1kHz
0
= 3.7V, V
V
f = 1kHz
R
UNWEIGHTED
OUT
L
OUTPUT FREQUENCY SPECTRUM
HP
= 8Ω
= -60dBV
= ∞. C1 = C2 = C
5
SPEAKER MODE
CCIO
FREQUENCY (kHz)
SPEAKER AMPLIFIERS (Headphone Disabled)
100
400μs/div
= 1.8V, V
10
-100
-10
-20
-30
-40
-50
-60
-70
-80
-90
Typical Operating Characteristics (continued)
0
BIAS
15
GND
0.01
MAX9879 toc19
R
V
INPUTS AC GROUNDED
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (SPEAKER MODE)
L
RIPPLE
= 1µF. T
= V
= 8Ω
20
PGNDL
= 100mV
0.1
SHDN
1V/div
OUT+ - OUT-
1V/div
FREQUENCY (kHz)
A
P-P
= +25°C, unless otherwise noted.)
= V
1
PGNDR
RIGHT
10
= 0. Single-ended inputs, preamp = 0dB, volume con-
LEFT
-100
-110
-120
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
0
100
WIDEBAND FREQUENCY SPECTRUM
-100
-120
RBW = 1kHz
INPUT AC GROUNDED
(SPEAKER MODE)
-20
-40
-60
-80
FREQUENCY (MHz)
0
1
0.01
2ms/div
R
V
L
IN
= 8Ω
= 1
CROSSTALK vs. FREQUENCY
VP-P
0.1
10
RIGHT TO LEFT
FREQUENCY (kHz)
MAX9879 toc20
1
100
LEFT TO RIGHT
SDA
2V/div
SCL
2V/div
10
100