Datasheet
(PV
DD
= V
DD
= +20V, PGND = GND = 0V, C
SS
= 0.47µF, C
REG
= 0.01µF, C1 = 0.1µF, C2 = 1µF, R
LOAD
= ∞, MONO = low (stereo
mode), SHDN = MUTE = high, G1 = low, G2 = high (A
V
= 22dB), FS1 = FS2 = high (SSM), SYNCIN = low. All load resistors (R
L
) are
connected between OUT_+ and OUT_-, unless otherwise stated. T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
Note 1: All devices are 100% production tested at +25°C. All temperature limits are guaranteed by design.
Note 2: Inputs AC-coupled to GND.
Note 3: Testing performed with an 8Ω resistive load in series with a 68µH inductive load across the BTL outputs.
Note 4: Minimum output power is guaranteed by pulse testing.
Note 5: Testing performed with an 8Ω resistive load in series with a 68µH inductive load connected across BTL outputs. Mode tran-
sitions are controlled by SHDN.
Note 6: Testing performed with a 4Ω resistive load in series with a 33µH inductive load across the BTL outputs.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Short-Circuit Current
Threshold
I
SC
R
LOAD
= 0Ω 3 A
Click-and-Pop Level K
CP
Peak voltage, 32
samples/second,
A-weighted (Notes 2, 5)
Into shutdown -63
dBV
Out of shutdown -55
MONO MODE (R
LOAD
= 4Ω, MONO = HIGH) (Note 6)
Quiescent Current
MUTE = 1, R
LOAD
= ∞ 20
mA
MUTE = 0 6.5
Output Power P
OUT
f = 1kHz, THD = 10%
R
LOAD
= 8Ω 25
W
R
LOAD
= 4Ω 50
Total Harmonic Distortion Plus
Noise
THD+N
f = 1kHz, BW = 22Hz to 22kHz,
P
OUT
= 22W
0.09 %
Signal-to-Noise Ratio SNR P
OUT
= 10W
20Hz to 20kHz 91
dB
A-weighted 95
Efciency η P
OUT
= 54W, f = 1kHz 86 %
Output Short-Circuit Current
Threshold
I
SC
R
LOAD
= 0Ω 6 A
Click-and-Pop Level K
CP
Peak voltage, 32
samples/second,
A-weighted (Notes 2, 5)
Into shutdown -60
dBV
Out of shutdown -63
DIGITAL INPUTS (SHDN, MUTE, G1, G2, FS1, FS2, TH0, TH1, TH2, SYNCIN, MONO)
Logic-Input Current I
IN
0 to 12V 1 µA
Logic-Input High Voltage V
IH
2.5 V
Logic-Input Low Voltage V
IL
0.8 V
OPEN-DRAIN OUTPUTS (TEMP, SYNCOUT)
Open-Drain Output Low Voltage V
OL
I
SINK
= 3mA 0.4 V
Leakage Current I
LEAK
V
PULLUP
= 5.5V 0.2 µA
MAX9709 25W/50W, Filterless, Spread-Spectrum,
Stereo/Mono, Class D Amplier
www.maximintegrated.com
Maxim Integrated
│
4
Electrical Characteristics (continued)