Datasheet

MAX9742
Single-/Dual-Supply, Stereo 16W,
Class D Amplifier with Differential Inputs
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
(V
DD
= 15V, V
SS
= V
SUB
= -15V, V
SHDN
= 3.3V, V
MID
= LGND = 0V, C
VDD
= C
VSS
= 1000µF, C
BYP
= 1µF, C
SFT
= 0.22µF, C
FB_1
=
150pF, C
FB_2
= 10pF, C
BOOT
= 0.1µF, C
REGP
= C
REGM
= 1µF, R
IN_
= 30.1kΩ, R
F1A
= 121kΩ, R
F1B
= 562kΩ, R
F2
= 681kΩ, R
REF
=
68kΩ, R
L
= ∞, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Positive Supply Current I
DD
No load, output filter removed 23 36 mA
Negative Supply Current I
SS
No load, output filter removed -36 -23 mA
Positive Supply Shutdown
Current
No load, V
SHDN
= 0V 0.001 1 µA
Negative Supply Shutdown
Current
No load, V
SHDN
= 0V -1 -0.03 µA
Output Offset Voltage
Output referred, affected by R
IN_
and R
F_
tolerances (Note 4)
530mV
IN_ Input Bias Current -1 +1 µA
V
DD
= 10V to 20V 97
V
SS
= -10V to -20V 100
V
DD
= 15V + 500mV
P-P
, f = 1kHz 67
Power-Supply Rejection Ratio
(Note 4)
PSRR
V
SS
= -15V + 500mV
P-P
, f = 1kHz 64
dB
Crosstalk
(Notes 5 and 6)
L to R, R to L, R
L
= 8Ω, P
OUT
= 1W, f = 1kHz -61 dB
R
L
= 8Ω 14
R
L
= 8Ω, V
DD
= 18V,
V
SS
= -18V
21
Continuous Output Power P
OUT
f
IN
= 1kHz,
THD+N = 10%
(Notes 5, 6, and 7)
R
L
= 4Ω, V
DD
= 12V,
V
SS
= -12V
9.5
W
Efficiency
(Notes 5, 6, and 7)
R
L
= 8Ω, P
OUT
= 15W, THD+N = 10% 93 %
R
L
= 8Ω, P
OUT
= 5W 0.06
Total Harmonic Distortion
Plus Noise
THD+N
f
IN
= 1kHz,
BW = 22Hz to 22kHz
(Notes 5, 6, and 7)
R
L
= 4Ω, P
OUT
= 10W 0.08
%
Unweighted 89
Signal-to-Noise Ratio SNR
P
OUT
= 14W,
R
L
= 8Ω, BW = 22Hz to
22kHz (Notes 5 and 6)
A-weighted 94
dB
Shutdown-to-Full Operation t
SON
68 ms
Short-Circuit Output Current I
SC
OUT_ shorted to V
DD
or V
SS
2.9 4.5 A
Into shutdown -36
Click-and-Pop K
CP
P eak vol tag e, 32- sam p l es
p er second , A- w ei g hted
( N otes 4 and 8)
Out of shutdown -36
dBV