Datasheet
MAX9742
Single-/Dual-Supply, Stereo 16W,
Class D Amplifier with Differential Inputs
_______________________________________________________________________________________
7
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9742 toc10
OUTPUT POWER (W)
THD+N (%)
2010
0.1
0.01
1
10
100
0.001
04030
BTL CONFIGURATION
V
DD
= 24V
R
L
= 8
Ω
f = 1kHz
f = 100Hz
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9742 toc11
OUTPUT POWER PER CHANNEL (W)
THD+N (%)
105
0.1
1
10
100
0.01
015
f = 1kHz
f = 100Hz
SINGLE SUPPLY
V
DD
= 24V
R
L
= 8
Ω
T
A
= 40
°
C
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9742 toc12
OUTPUT POWER PER CHANNEL (W)
THD+N (%)
105
0.1
1
10
100
0.01
02015
f = 1kHz
f = 100Hz
SINGLE SUPPLY
V
DD
= 24V
R
L
= 8
Ω
T
A
= 40
°
C
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9742 toc13
OUTPUT POWER (W)
THD+N (%)
2010
0.1
1
10
100
0.001
0.01
04030
f = 1kHz
f = 100Hz
BTL CONFIGURATION
V
DD
= 24V
R
L
= 8
Ω
T
A
= 40
°
C
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9742 toc14
FREQUENCY (Hz)
THD+N (%)
10k1k
0.1
1
10
100
0.01
100 100k
DUAL SUPPLY
R
L
= 8
Ω
P
OUT
= 8W
P
OUT
= 4W
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9742 toc15
FREQUENCY (Hz)
THD+N (%)
10k1k
0.1
1
10
100
0.01
100 100k
DUAL SUPPLY
R
L
= 4
Ω
P
OUT
= 13W
P
OUT
= 8W
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9742 toc16
FREQUENCY (Hz)
THD+N (%)
10k1k
0.1
1
10
100
0.001
0.01
100 100k
SINGLE SUPPLY
V
DD
= 24V
R
L
= 8
Ω
P
OUT
= 5W
P
OUT
= 3W
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9742 toc17
FREQUENCY (Hz)
THD+N (%)
10k1k
0.1
1
10
100
0.001
0.01
100 100k
SINGLE SUPPLY
V
DD
= 24V
R
L
= 4
Ω
P
OUT
= 9W
P
OUT
= 5W
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9742 toc18
FREQUENCY (Hz)
THD+N (%)
10k1k
0.1
1
10
100
0.001
0.01
100 100k
BTL CONFIGURATION
V
DD
= 24V
R
L
= 8
Ω
P
OUT
= 17W
P
OUT
= 12W
Typical Operating Characteristics (continued)
(24V single-supply mode, ±15V dual-supply mode, both channels driven in phase, THD+N measurement bandwidth = 22Hz to
22kHz, T
A
= +25°C, unless otherwise noted. See Figure 1 for test circuits, see
Typical Application Circuits/Functional Diagrams
for
test circuit component values.)