Rainbow Electronics MAX9820 - Manual (Page 5)

MAX9820
DirectDrive Headphone Amplifier
with External Gain
_______________________________________________________________________________________ 5
THD+N vs. FREQUENCY
MAX9820 toc07
FREQUENCY (Hz)
10,000 1000 100 10 100,000
THD+N (%)
0.01
0.1
1
10
0.001
V DD = 3.6V
R LOAD = 16 I
L LOAD = 1 FH
P OUT = 20mW
P OUT = 10mW
THD+N vs. FREQUENCY
MAX9820 toc08
FREQUENCY (Hz)
10,000 1000 100 10 100,000
THD+N (%)
0.01
0.1
1
10
0.001
V DD = 3.6V
R LOAD = 32 I
L LOAD = 1 FH
P OUT = 30mW
P OUT = 10mW
VISTA THD+N vs. FREQUENCY
MAX9820 toc09
FREQUENCY (Hz)
THD+N (dBFS)
10,000 1000 100
-100
-80
-60
-40
-20
0
-120
10 100,000
V DD = 5.0V
R LOAD = 32 I
L LOAD = 1 FH
V OUT = -3dBFS
FS = 300mV RMS
FS = 1V
RMS
VISTA THD+N vs. FREQUENCY
MAX9820 toc10
FREQUENCY (Hz)
THD+N (dBFS)
10,000 1000 100
-100
-80
-60
-40
-20
0
-120
10 100,000
V DD = 5.0V
R LOAD = 10k I
L LOAD = 1µH
V OUT = -3dBFS
FS = 707mV RMS
FS = 1V RMS
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX9820 toc11
SUPPLY VOLTAGE (V)
P
OUT
(mW)
5.1 4.7 4.3 3.9 3.5 3.1
30
60
90
120
150
180
0
2.7 5.5
R LOAD = 16 I
L LOAD = 1µH
THD+N = 10%
THD+N = 1%
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX9820 toc12
SUPPLY VOLTAGE (V)
P
OUT
(mW)
5.1 4.7 4.3 3.9 3.5 3.1
30
60
90
120
150
180
0
2.7 5.5
R LOAD = 32 I
L
LOAD
= 1µH
THD+N = 10%
THD+N = 1%
Typical Operating Characteristics
(V DD = V SHDN = 5V, V GND = 0V, R IN = R FB = 40.2k
Ω (gain = -1V/V), C1 = C2 = 1µF, C3 = 10µF, R
LOAD =
∞. Typical values are at T
A
= +25°C, unless otherwise noted.)