Instruction Manual

MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= PV
DD
= CPV
DD
= 3.3V, GND = PGND = CPGND = 0V, SHDN = V
DD
, I
2
C settings (INA gain = +20dB, INB gain = INC gain =
0dB, volume setting = 0dB, mono path gain = 0dB, SHDN = 1, SSM = 1). Speaker load resistors (R
LSP
) are terminated between
OUT+ and OUT-, headphone load resistors are terminated to GND, unless otherwise noted. C1 = C2 = C3 = 1µF. T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RECEIVER AMPLIFIER
Output Offset Voltage V
OS
T
A
= +25°C ±1.8 mV
Into shutdown -62
Into mute -67
Out of shutdown -63
Click-and-Pop Level K
CP
Peak voltage, T
A
=
+25°C, A-weighted,
32 samples per
second (Notes 3, 5)
Out of mute -66
dB
V
DD
= 2.7V to 5.5V 58 80
f = 217Hz, 100mV
P-P
ripple
80
f = 1kHz, 100mV
P-P
ripple
70
Power-Supply Rejection Ratio
(Note 3)
PSRR T
A
= +25°C
f = 20kHz, 100mV
P-P
ripple
62
dB
R
L
= 16Ω 60
Output Power P
OUT
T
A
= +25°C,
THD+N = 1%
R
L
= 32Ω 50
mW
Gain A
V
3dB
R
L
= 16Ω (V
OUT
= 800mV
RMS
, f = 1kHz) 0.03
Total Harmonic Distortion Plus
Noise
THD+N
R
L
= 32Ω (V
OUT
= 800mV
RMS
, f = 1kHz) 0.024
%
BW = 20Hz to 20kHz 87
Signal-to-Noise Ratio SNR
R
L
= 16Ω, V
OUT
=
800mV
RMS
(Note 3)
A-weighted 89
dB
Slew Rate SR 0.3 V/µs
Capacitive Drive C
L
300 pF
HEADPHONE AMPLIFIERS
Output Offset Voltage V
OS
T
A
= +25°C ±1.8 mV
Into shutdown -61
Into mute -65
Out of shutdown -60
Click-and-Pop Level K
CP
Peak voltage, T
A
=
+25°C, A-weighted,
32 samples per
second (Notes 2, 5)
Out of mute -64
dB
Contact ±4
ESD Protection HP_
Air ±8
kV
V
DD
= 2.7V to 5.5V 58 80
f = 217Hz, 100mV
P-P
ripple
80
f = 1kHz, 100mV
P-P
ripple
70
Power-Supply Rejection Ratio
(Note 3)
PSRR T
A
= +25°C
f = 20kHz, 100mV
P-P
ripple
62
dB