Datasheet

MAX9759
3.2W, High Efficiency, Low-EMI, Filterless,
Class D Audio Amplifier
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (V
DD
= 5.0V) (continued)
(V
DD
= PV
DD
= SHDN = MUTE = 5V, GND = PGND = 0V, SYNC = 0V (FFM). Gain = 12dB (G1 = 0, G2 = 1). Speaker load resistor
(R
L
) connected between OUT+ and OUT-, unless otherwise noted, R
L
= ∞, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical val-
ues are at T
A
= +25°C.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
R
L
= 3Ω 3.4
R
L
= 4Ω 2.6THD+N = 1%
R
L
= 8Ω 1.4
R
L
= 3Ω 4.3
R
L
= 4Ω 3.2
Output Power P
OUT
THD+N = 10%
R
L
= 8Ω 1.8
W
R
L
= 3Ω
0.08
R
L
= 4Ω
0.05
Total Harmonic Distortion Plus
Noise
THD+N
f
IN
= 1kHz, either
FFM or SSM,
P
OUT
= 1W
R
L
= 8Ω
0.02
%
FFM 93
BW = 22Hz to
22kHz
SSM 89
FFM 96
Signal-to-Noise Ratio SNR
P
OUT
= 1W,
R
L
= 8Ω
A-weighted
SSM 92
dB
SYNC = GND (FFM mode)
1000 1100 1200
SYNC = FLOAT (FFM mode)
1102 1500 1837
Oscillator Frequency f
OSC
SYNC = V
DD
(SSM mode)
1200
±70
kHz
SYNC Frequency Lock Range TTL-compatible clock input
1000 1600
kHz
Into shutdown -50
Click-and-Pop Level K
CP
Peak voltage,
A-weighted, 32 samples
per second (Notes 3, 4)
Out of shutdown
-57
dBV
Efficiency η
P
OUT
= 1W, f
IN
= 1kHz, R
L
= 8Ω in series
with 68µH
92 %
DIGITAL INPUTS (SHDN, MUTE, G1, G2, SYNC)
SYNC, G1, G2 Input Voltage High
V
INH
V
DD
x 0.9 V
SYNC, G1, G2 Input Voltage Low
V
INL
V
DD
x 0.1
V
SHDN, MUTE Voltage High V
INH
2V
SHDN, MUTE Voltage Low V
INL
0.8 V
SYNC Input Resistance
200
kΩ
SYNC Input Current ±35 µA
SHDN, MUTE, G1, G2 Input
Current
±1µA
SYNC Capacitance 10 pF
DIGITAL OUTPUTS (SYNC_OUT)
Output Voltage High V
OH
I
OH
= 3mA 2.4 V
Output Voltage Low V
OL
I
OL
= 3mA 0.4 V
SYNC_OUT Capacitive Drive TTL-compatible clock output
100
pF