PAM8404
3W/CH Filterless Stereo Class-D Audio Amplifier
Typical Operating Characteristics (TA=25°C)
QFN 4x4 20-Pin
THD+N vs Frequency
VDD=5V, RL=8Ω, CIN=1μF,Gain=23dB
THD+N vs Frequency
VDD=5V, RL=4Ω, CIN=1μF,Gain=23dB
30
30
20
20
10
5
10
5
PO=1W
PO=1W
2
1
2
1
PO=1.3W
PO=0.5W
%
0.5
%
0.5
0.2
0.1
0.2
0.1
PO=0.5W
0.0 5
0.05
P =2
O
W
0.0 2
0.0 1
0.02
0.01
20
50
100
200
500
Hz
1k
2k
5k
10k 20k
20
50
100
200
500
Hz
1k
2k
5k
10k 20k
Frequency Response
VDD=5V, RL=4Ω, CIN=1μF
PSSR vs Frequency
Input ac-ground, VDD=5V 200mVpp,
RL=4Ω, CIN=1μF, gain=16dB
+0
+25
+2 2.5
+2 0
G0=1G1=1
-10
-20
-30
-40
-50
-60
-70
-80
+1 7.5
+1 5
G0=0 G1=1
G0=1G1=0
d
B
r
d
R
+1 2 .5
+1 0
B
A
+7.5
G0=0 G1=0
+5
L
+2.5
-90
+0
20
-100
20
50
100
200
500
Hz
1k
2k
5k
10 k 20 k
50 100 200
500 1k
Hz
2k
5k
10k 20k
Crosstalk vs Frequency
VDD=5V, RL=4Ω, Gain=23dB
Noise Floor FFT
Inputs ac-ground, VDD=5V, CIN=1μF, RL=4Ω,
Gain=23dB
-65
-70
-50
T T
-60
-75
-80
-85
-90
-70
-80
-90
R to L
d
B
r
L
d
B
-95
A
-100
-105
-110
-115
-100
-110
-120
L to R
R
-120
20
50
100
200
500
Hz
1k
2k
5k
10k 20k
20
50
100 200
500
Hz
1k
2k
5k
10k 20k
Power Analog Microelectronics,Inc
www.poweranalog.com
03/2009 Rev 1.1
8
PAM [ POWER ANALOG MICOELECTRONICS ]
