Rainbow Electronics MAX9820 - Manual (Page 7)

MAX9820
DirectDrive Headphone Amplifier
with External Gain
_______________________________________________________________________________________ 7
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.)
VISTA CROSSTALK vs. FREQUENCY
MAX9820 toc19
FREQUENCY (Hz)
CROSSTALK (dB)
10,000 1000 100
-100
-80
-60
-40
-20
0
-120
10 100,000
R
LOAD
= 32 I
L LOAD = 1µH
FS = 300mV RMS
V OUT = -20dBFS
LEFT TO RIGHT
RIGHT TO LEFT
VISTA CROSSTALK vs. FREQUENCY
MAX9820 toc20
FREQUENCY (Hz)
CROSSTALK (dB)
10,000 1000 100
-120
-100
-80
-60
-40
-20
0
-140
10 100,000
LEFT TO RIGHT
RIGHT TO LEFT
R LOAD = 1k I
L LOAD = 1µH
FS = 707mV RMS
V OUT = -20dBFS
OUTPUT SPECTRUM
MAX9820 toc21
FREQUENCY (kHz)
OUTPUT MAGNITUDE (dBV)
18 16 14 12 10 8 6 4 2
-120
-100
-80
-60
-40
-20
0
-140
0 20
f = 1kHz
R
LOAD = 32 I
L LOAD = 1µH
QUIESCENT CURRENT
vs. SUPPLY VOLTAGE
MAX9820 toc22
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.1 4.7 3.9 4.3 3.5 3.1
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0
2.7 5.5
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
MAX9820 toc23
SUPPLY VOLTAGE (V)
SHUTDOWN CURRENT (nA)
5.1 4.7 4.3 3.9 3.5 3.1
0.05
0.10
0.15
0.25
0.20
0.30
0.40
0.35
0.45
0
2.7 5.5
EXITING SHUTDOWN
MAX9820 toc24
OUT_
1V/div
SHDN
2V/div
100 Fs/div
ENTERING SHUTDOWN
MAX9820 toc25
OUT_
1V/div
SHDN
2V/div
100 Fs/div