Electrical characteristics (continued) – Rainbow Electronics MAX9796 User Manual
Page 3
MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
_______________________________________________________________________________________
3
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SPEAKER AMPLIFIER
T
A
= +25°C
±5.5
±23.5
Output Offset Voltage
V
OS
T
MIN
≤ T
A
≤ T
MAX
±40
mV
Into shutdown
-62
Out of shutdown
-60
Into mute
-63
Click-and-Pop Level
K
CP
Peak voltage, T
A
=
+25°C, A-weighted,
32 samples per
second (Notes 3, 4)
Out of mute
-62
dB
V
DD
= 2.7V to 5.5V
48
70
f = 217Hz, 100mV
P-P
ripple
68
f = 1kHz, 100mV
P-P
ripple
60
Power-Supply Rejection Ratio
(Note 3)
PSRR
T
A
= +25°C
f = 20kHz, 100mV
P-P
ripple
50
dB
R
L
= 4
Ω, V
DD
= 5V,
f = 1kHz
2300
R
L
= 8
Ω, V
DD
= 3.3V,
f = 1kHz
600
Output Power (Note 4)
P
OUT
THD+N = 1%,
T
A
= +25°C
R
L
= 8
Ω, V
DD
= 5V,
f = 1kHz
1300
mW
Current Limit
1.6
A
R
L
= 8
Ω,
P
OUT
= 800mW
0.03
Total Harmonic Distortion Plus
Noise (Note 4)
THD+N
f = 1kHz
R
L
= 4
Ω,
P
OUT
= 830mW
0.04
%
BW = 20Hz to 20kHz
81
Signal-to-Noise Ratio
SNR
V
OUT
= 1.8V
RMS
,
R
L
= 8
Ω (Note 3)
A-weighted
84
dB
Fixed-frequency modulation (SSM = 0)
1100
Output Frequency
f
OSC
Spread-spectrum modulation (SSM = 1)
1100
±30
kHz
Efficiency
η
P
OUT
= 470mW, f = 1kHz both channel
driven, L = 68µH in series with 8
Ω load
80
%
Gain
A
V
12
dB
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)