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MAX9706/MAX9707
3-Channel, 2.3W, Filterless Class D Amplifiers
with Active Crossover
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VDD = PVDD = HPVDD = 5V, GND = PGND = CPGND = 0V, SHDN = VDD, GAIN1 = GAIN2 = GND (SPKR = +9dB, HP = 0dB), HPS =
GND, FS0 = FS1 = GND (800Hz), MGAIN = float (-6dB), SYNC_IN = VDD (SSM), speaker load RL connected between OUT_+ and
OUT_-, unless otherwise noted, RL =
∞. Headphone load RLH connected between HPR/HPL to GND, RLH = ∞. CBIAS = 1F to GND,
C1 = 1F, C2 = 1F. TA = TMIN to TMAX, unless otherwise noted. Typical values at TA = +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VDD, PVDD, HPVDD, CPVDD to GND ........................-0.3V to +6V
GND to PGND, CPGND.........................................-0.3V to +0.3V
CPVSS, VSS to GND..................................................-6V to +0.3V
C1N to GND ...........................................(CPVSS - 0.3V) to +0.3V
C1P to GND ...........................................-0.3V to (CPVDD + 0.3V)
HPL, HPR.....................................................................-3V to +3V
All Other Pins to GND.................................-0.3V to (VDD + 0.3V)
OUT_+, OUT_ -, Short Circuit to GND or PVDD ...........Continuous
OUT_+ Short Circuit to OUT_-....................................Continuous
HPR, HPL Short Circuit to GND..................................Continuous
MONO_OUT Short Circuit to GND or VDD ....................Continuous
Continuous Current (PVDD, OUT_+, OUT_-, PGND).............1.7A
Continuous Current (MONO_OUT, CPVDD, C1N, C1P,
CPGND, CPVSS, VSS, HPVDD, HPR, HPL) ......................0.85A
Continuous Current (all other pins) .....................................20mA
Continuous Power Dissipation (TA = +70°C)
Single-Layer Board
36-Pin TQFN (derate 26.3mW/°C above +70°C) .......2105mW
Multilayer Board
36-Pin TQFN (derate 35.7mW/°C above +70°C) .......2857mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Speaker Amplifier Supply Voltage
Range
VDD, PVDD Inferred from PSRR test
4.5
5.5
V
Headphone Amplifier Supply
Voltage Range
HPVDD,
CPVDD
Inferred from PSRR test (MAX9706)
3.0
5.5
V
Speaker mode
25
35
Quiescent Supply Current
IDD
Headphone mode, HPS = VDD (MAX9706)
7
12
mA
Shutdown Supply Current
ISHDN
SHDN = GND
0.5
3
A
Input Resistance
RIN
15
25
35
k
Speaker mode
87
Turn-On Time, Shutdown to Full
Operation
Headphone mode (MAX9706)
87
ms
SPEAKER AMPLIFIERS (OUTL_, OUTR_, OUTM_)
RL = 8
, THD+N = 1%
1.4
Output Power (Note 2)
POUT
RL = 4
, THD+N = 1%
2.3
W
RL = 8
0.06
Total Harmonic Distortion Plus
Noise
THD+N
POUT = 1W,
bandwidth = 22Hz to
22kHz (Note 2)
RL = 4
0.07
%
Bandwidth =
22Hz to 22kHz
87
Signal-to-Noise Ratio
SNR
RL = 8
, POUT = 1W
(Note 2)
A-weighted
92
dB
VDD = PVDD = 4.5V to 5.5V, TA = +25°C
50
71
f = 2kHz, OUTL_, OUTR_
51
Power-Supply Rejection Ratio
PSRR
100mVP-P ripple
(Note 3)
f = 100Hz, OUTM_
65
dB