Datasheet
MAX9742
Single-/Dual-Supply, Stereo 16W,
Class D Amplifier with Differential Inputs
10 ______________________________________________________________________________________
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9742 toc35
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
30
0.8
1.0
0
0.4
0.6
0.2
20 4025 35
SINGLE SUPPLY
INPUTS AC GROUNDED
NO LOAD CONNECTED
WIDEBAND OUTPUT SPECTRUM
MAX9742 toc36
FREQUENCY (MHz)
OUTPUT AMPLITUDE (dBV)
10
-20
0
-120
-60
-40
-100
-80
0.1 1001.0
RBW = 10kHz
MEASURED AT SINGLE-
ENDED FILTER OUTPUT
INPUTS AC GROUNDED
OUTPUT SPECTRUM FFT
MAX9742 toc37
FREQUENCY (Hz)
OUTPUT AMPLITUDE (dBV)
10k 15k
-20
0
-120
-60
-40
-100
-80
0 20k5k
SINGLE SUPPLY
R
L
= 8
Ω
f
IN
= 1kHz
V
OUT_
= -60dBV
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9742 toc38
FREQUENCY (Hz)
PSRR (dB)
1k 10k
-10
0
-80
-30
-20
-50
-60
-70
-40
10 100k100
DUAL SUPPLY
R
L
= 8
Ω
V
DD
= 15V + 500mV
P-P
V
SS
= -15V + 500mV
P-P
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9742 toc39
FREQUENCY (Hz)
PSRR (dB)
10k1k100
-100
-80
-60
-40
-20
0
20
-120
10 100k
OUT_ PSRR
SINGLE SUPPLY
V
DD
= 24V + 500mV
P-P
R
L
= 8
Ω
MID PSRR
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9742 toc40
FREQUENCY (Hz)
PSRR (dB)
1k 10k
0
-100
-20
-60
-90
-40
-10
-50
-80
-70
-30
10 100k100
BTL
V
DD
= 24V + 500mV
P-P
R
L
= 8
Ω
CROSSTALK vs. FREQUENCY
MAX9742 toc41
FREQUENCY (Hz)
CROSSTALK (dB)
1k 10k
0
-90
-20
-60
-80
-40
-10
-50
-70
-30
10 100k100
L INTO R
R INTO L
DUAL SUPPLY
R
L
= 8Ω
P
OUT
= 1W
CROSSTALK vs. FREQUENCY
MAX9742 toc42
FREQUENCY (Hz)
CROSSTALK (dB)
10k1k100
-100
-80
-60
-40
-20
0
20
-120
10 100k
R INTO L
L INTO R
SINGLE SUPPLY
R
L
= 8Ω
P
OUT
= 1W
EXITING SHUTDOWN
(DUAL SUPPLY)
MAX9742 toc43
20ms/div
V
OUT_
20V/div
V
SHDN
2V/div
FILTERED
V
OUT_
5V/div
DUAL SUPPLY
R
L
= 8Ω
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.)