MAX9776 Maxim Integrated Products, MAX9776 Datasheet - Page 13

• Manufacturer Part Number: MAX9776
• Description: (MAX9775 / MAX9776) Stereo Class D Audio Subsystem
• Manufacturer: Maxim Integrated Products

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(V
INC gain = 0dB, volume setting = 0dB, mono path gain = 0dB, SHDN = 1, SSM = 1). Speaker load resistors (R
between OUT_+ and OUT_-, headphone load resistors are terminated to GND, unless otherwise stated. C1 = C2 = C3 = 1µF. T
+25°C, unless otherwise noted.)
DD
-100
200
180
160
140
120
100
-10
-20
-30
-40
-50
-60
-70
-80
-90
80
60
40
20
0
= PV
0
10
10
V
V
R
POWER-SUPPLY REJECTION RATIO
DD
IN
L
DD
= 32Ω
THD+N = 1%
= 100mV
= 3.3V
HPR
= CPV
100
2 x 1.5W, Stereo Class D Audio Subsystem
P-P
OUTPUT POWER
vs. FREQUENCY
THD+N = 10%
FREQUENCY (Hz)
DD
vs. LOAD
______________________________________________________________________________________
LOAD (Ω)
100
1k
= 3.3V, GND = PGND = CPGND = 0V, SHDN = V
with DirectDrive Headphone Amplifier
10k
V
f = 1kHz
HPL
DD
= 5V
100k
1000
-100
-120
-140
Typical Operating Characteristics (continued)
200
180
160
140
120
100
-20
-40
-60
-80
80
60
40
20
20
0
0
10
0
V
f = 1kHz
THD+N = 1%
V
f = 1kHz
R
DD
OUTPUT FREQUENCY SPECTRUM
DD
L
= 32Ω
= 3.3V
= 3.3V
5k
OUTPUT POWER
THD+N = 10%
FREQUENCY (Hz)
vs. LOAD
LOAD (Ω)
100
10k
DD
, I
15k
2
C default gain settings (INA gain = +20dB, INB gain =
1000
20k
-100
-110
-120
100
-10
-20
-30
-40
-50
-60
-70
-80
-90
80
60
40
20
0
0
10
10
OUTPUT POWER vs. LOAD RESISTANCE
AND CHARGE-PUMP CAPACITOR SIZE
V
f = 1kHz
THD+N = 1%
OUT_ = 1V
R
C1 = C2 = 0.68µF
DD
L
= 32Ω
= 3.3V
CROSSTALK vs. FREQUENCY
LEFT TO RIGHT
100
C1 = C2 = 2.2µF
P-P
RIGHT TO LEFT
FREQUENCY (Hz)
LOAD (Ω)
LSP
C1 = C2 = 1µF
100
1k
) are terminated
10k
A
1000
100k
=
13