Typical operating characteristics – Rainbow Electronics MAX9729 User Manual
Page 6
MAX9729
Stereo Headphone Amplifier with BassMax,
Volume Control, and Input Mux
6
_______________________________________________________________________________________
Typical Operating Characteristics
(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.)
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9729 toc01
OUTPUT POWER PER CHANNEL (mW)
THD+N (%)
50
60
70
10
20
30
40
0
80
100
0.01
0.1
1
10
V
DD
= 3V
R
L
= 16
Ω
f
IN
= 100Hz
f
IN
= 5kHz
f
IN
= 1kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9729 toc02
OUTPUT POWER PER CHANNEL (mW)
THD+N (%)
50
60
70
10
20
30
40
0
80
100
0.01
0.1
1
10
V
DD
= 3V
R
L
= 32
Ω
f
IN
= 100Hz
f
IN
= 1kHz
f
IN
= 5kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9729 toc03
OUTPUT POWER PER CHANNEL (mW)
THD+N (%)
0
5
10
15 20
25 30
35
40 45 50
100
0.01
0.1
1
10
V
DD
= 2.4V
R
L
= 16
Ω
f
IN
= 100Hz
f
IN
= 1kHz
f
IN
= 5kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX9729 toc04
OUTPUT POWER PER CHANNEL (mW)
THD+N (%)
0
5
10
15 20
25 30
35
40 45 50
100
0.01
0.1
1
10
V
DD
= 2.4V
R
L
= 32
Ω
f
IN
= 100Hz
f
IN
= 1kHz
f
IN
= 5kHz
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9729 toc05
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.1
0.01
1
0.001
10
100k
V
DD
= 3V
R
L
= 16
Ω
P
OUT
= 42mW
P
OUT
= 9mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9729 toc06
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.01
0.1
1
0.001
10
100k
V
DD
= 3V
R
L
= 32
Ω
P
OUT
= 40mW
P
OUT
= 5mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9729 toc07
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.01
0.1
1
0.001
10
100k
V
DD
= 2.4V
R
L
= 16
Ω
P
OUT
= 23mW
P
OUT
= 8mW
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
MAX9729 toc08
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.01
0.1
1
0.001
10
100k
V
DD
= 2.4V
R
L
= 32
Ω
P
OUT
= 23mW
P
OUT
= 3mW
0
50
200
100
150
300
250
350
0
20
40
60
80 100
140
120
160 180
POWER DISSIPATION
vs. OUTPUT POWER
MAX9729 toc09
OUTPUT POWER (mW)
POWER DISSIPATION (mW)
V
DD
= 3V
f
IN
= 1kHz
P
OUT
= P
OUTL
+ P
OUTR
R
L
= 32
Ω
R
L
= 16
Ω