MAX9879 Maxim Integrated Products, MAX9879 Datasheet - Page 12

• 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
(V
trols = 0dB, BYPASS = 0, SHDN = 1. Speaker loads connected between OUT_+ and OUT_-. Headphone loads connected from HPL
or HPR to GND. R
12
0.001
DD
-100
0.01
100
160
140
120
100
-10
-20
-30
-40
-50
-60
-70
-80
-90
0.1
10
80
60
40
20
0
0
______________________________________________________________________________________
= V
0.01
0.1
2.7
vs. OUTPUT POWER (HEADPHONE MODE)
TOTAL HARMONIC DISTORTION + NOISE
OUTPUT POWER vs. SUPPLY VOLTAGE
vs. FREQUENCY (HEADPHONE MODE)
V
INPUTS AC GROUNDED
V
POWER SUPPLY REJECTION RATIO
PVDDL
RIPPLE
DD
3.1
= 3.7V
LEFT
= 100mV
0.1
R
3.5
= V
L
OUTPUT POWER (mW)
SUPPLY VOTAGE (V)
= 16Ω
FREQUENCY (kHz)
1
SPK
PVDDR
P-P
3.9
THD+N = 10%
= ∞, R
1
R
f
4.3
IN
RIGHT
L
= 3.7V, V
= 16Ω
= 1kHz
THD+N = 1%
10
HP
4.7
10
= ∞. C1 = C2 = C
R
L
= 32Ω
5.1
CCIO
HEADPHONE AMPLIFIERS (Speaker Disabled)
100
100
5.5
= 1.8V, V
-100
-120
-140
250
225
200
175
150
125
100
100
-20
-40
-60
-80
Typical Operating Characteristics (continued)
75
50
25
90
80
70
60
50
40
30
20
10
BIAS
0
0
0
GND
POWER DISSIPATION vs. OUTPUT POWER
10
0
0
OUTPUT POWER vs. LOAD RESISTANCE
vs. FREQUENCY (HEADPHONE MODE)
V
V
f =1kHz
R
POWER-SUPPLY REJECTION RATIO
= 1µF. T
DD
OUT
L
= V
= 32Ω
= 3.0V
= -60dB
PGNDL
THD+N = 1%
TOTAL OUTPUT POWER (mW)
(HEADPHONE MODE)
(HEADPHONE MODE)
5
R
LOAD RESISTANCE (Ω)
L
= 16Ω
FREQUENCY (kHz)
A
1
= +25°C, unless otherwise noted.)
= V
10
PGNDR
R
L
THD+N = 10%
= 32Ω
10
15
= 0. Single-ended inputs, preamp = 0dB, volume con-
V
f = 1kHz
DD
= 3.3V
100
100
20
100
-10
-20
-30
-40
-50
-60
-70
-80
80
75
60
50
40
30
20
10
90
80
70
50
30
20
10
0
0
0
0.01
2.7
10
OUTPUT POWER vs. LOAD RESISTANCE
OUTPUT POWER vs. SUPPLY VOLTAGE
C1 = C2 = 2.2μF
R
f = 1kHz
V
L
IN
= 16Ω
3.1
= 1V
C1 = C2 = 1μF
CROSSTALK vs. FREQUENCY
C1 = C2 = 0.47μF
P-P
LEFT TO RIGHT
0.1
(HEADPHONE MODE)
(HEADPHONE MODE)
3.5
LOAD RESISTANCE (Ω)
SUPPLY VOLTAGE (V)
FREQUENCY (Hz)
3.9
THD+N = 10%
THD+N = 10%
1
RIGHT TO LEFT
4.3
4.7
f = 1kHz
THD+N = 1%
R
f
IN
L
10
= 32Ω
= 1kHz
5.1
100
100
5.5