Rainbow Electronics MAX9820 - Manual (Page 6)

MAX9820
DirectDrive Headphone Amplifier
with External Gain
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(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.)
OUTPUT POWER vs. LOAD RESISTANCE
MAX9820 toc13
LOAD RESISTANCE ( I)
P
OUT
(mW)
100 10
30
60
90
120
150
0
1 1000
V
DD
= 5.0V
L LOAD = 1µH
THD+N = 10%
THD+N = 1%
OUTPUT POWER vs. LOAD RESISTANCE
LOAD RESISTANCE ( I)
P
OUT
(mW)
100 10
15
30
45
60
75
0
1 1000
V DD = 3.6V
L LOAD = 1µH
THD+N = 10%
THD+N = 1%
MAX9820 toc14
POWER DISSIPATION
vs. OUTPUT POWER
MAX9820 toc15
OUTPUT POWER PER CHANNEL (mW)
POWER DISSIPATION (mW)
100 80 60 40 20
100
200
300
400
500
600
0
0 120
V DD = 5.0V
L LOAD = 1µH
R LOAD = 16 I
R LOAD = 32 I
POWER DISSIPATION
vs. OUTPUT POWER
MAX9820 toc16
OUTPUT POWER PER CHANNEL (mW)
POWER DISSIPATION (mW)
100 80 20 40 60
50
100
150
200
250
300
350
400
0
0 120
V DD = 3.6V
L LOAD = 1µH
R LOAD = 16 I
R LOAD = 32 I
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9820 toc17
FREQUENCY (Hz)
PSRR (dB)
10,000 1000 100
-100
-80
-60
-40
-20
0
-120
10 100,000
LEFT CHANNEL
RIGHT CHANNEL
V RIPPLE = 200mV P-P
POWER-SUPPLY REJECTION RATIO
vs. SUPPLY VOLTAGE
MAX9820 toc18
SUPPLY VOLTAGE (V)
PSRR (dB)
5.1 4.7 4.3 3.9 3.5 3.1
-80
-60
-40
-20
0
-100
2.7 5.5
V RIPPLE = 200mV P-P
f = 1kHz
RIGHT CHANNEL
LEFT CHANNEL