Typical operating characteristics (continued) – Rainbow Electronics MAX9729 User Manual
Page 7
MAX9729
Stereo Headphone Amplifier with BassMax,
Volume Control, and Input Mux
_______________________________________________________________________________________
7
0
50
150
100
200
250
0
40
60
20
80
100
120
POWER DISSIPATION
vs. OUTPUT POWER
MAX9729 toc10
OUTPUT POWER (mW)
POWER DISSIPATION (mW)
V
DD
= 2.4V
f
IN
= 1kHz
P
OUT
= P
OUTL
+ P
OUTR
R
L
= 32
Ω
R
L
= 16
Ω
90
0
10
100
1000
OUTPUT POWER
vs. LOAD RESISTANCE
MAX9729 toc11
LOAD RESISTANCE (
Ω)
OUTPUT POWER PER CHANNEL (mW)
10
20
30
40
50
80
70
60
V
DD
= 3V
f
IN
= 1kHz
THD+N = 10%
THD+N = 1%
50
0
10
100
1000
OUTPUT POWER
vs. LOAD RESISTANCE
MAX9729 toc12
LOAD RESISTANCE (
Ω)
OUTPUT POWER PER CHANNEL (mW)
10
5
15
20
25
30
45
40
35
V
DD
= 2.4V
f
IN
= 1kHz
THD+N = 10%
THD+N = 1%
120
100
80
60
40
20
0
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9729 toc13
SUPPLY VOLTAGE (V)
OUTPUT POWER PER CHANNEL (mW)
3.4
3.2
2.8 3.0
2.2 2.4 2.6
2.0
1.8
3.6
f
IN
= 1kHz
R
L
= 16
Ω
THD+N = 10%
THD+N = 1%
120
100
80
60
40
20
0
OUTPUT POWER
vs. SUPPLY VOLTAGE
MAX9729 toc14
SUPPLY VOLTAGE (V)
OUTPUT POWER PER CHANNEL (mW)
3.4
3.2
2.8 3.0
2.2 2.4 2.6
2.0
1.8
3.6
f
IN
= 1kHz
R
L
= 32
Ω
THD+N = 10%
THD+N = 1%
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9729 toc15
FREQUENCY (Hz)
PSRR (dB)
10k
1k
100
0
-120
-100
-80
-60
-40
-20
10
100k
V
DD
= 3V
SUPPLY RIPPLE 100mV
P-P
R
L
= 32
Ω
HPR
HPL
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9729 toc16
FREQUENCY (Hz)
PSRR (dB)
10k
1k
100
0
-120
-100
-80
-60
-40
-20
10
100k
V
DD
= 2.4V
SUPPLY RIPPLE 100mV
P-P
R
L
= 32
Ω
HPR
HPL
CROSSTALK vs. FREQUENCY
MAX9729 toc17
FREQUENCY (Hz)
CROSSTALK (dB)
10k
1k
100
0
-120
-100
-80
-60
-40
-20
10
100k
GAIN = 3.5dB
V
OUT
= 1V
P-P
R
L
= 32
Ω
R TO L
L TO R
CROSSTALK vs. FREQUENCY
MAX9729 toc18
FREQUENCY (Hz)
CROSSTALK (dB)
10k
1k
100
0
-120
-100
-80
-60
-40
-20
10
100k
GAIN = 19.5dB
V
OUT
= 1V
P-P
R
L
= 32
Ω
L TO R
R TO L
Typical Operating Characteristics (continued)
(V
DD
= PV
DD
=
SHDN = 3V, PGND = SGND = 0V, C1 = C2 = C3 = 1µF, C
IN
= 1µF (1206 case size, X7R dielectric ceramic capacitor),
BM_ = 0V, maximum gain setting = 3.5dB, volume attenuation setting = 0dB (total voltage gain = 3.5dB), BassMax disabled. Load
connected between OUT_ and PGND where specified. THD+N measurement BW = 22Hz to 22kHz. Both channels loaded and driven
in phase. T
A
= +25°C, unless otherwise noted.)