MAX9779 查看數據表（PDF） - Maxim Integrated
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MAX9779 Datasheet PDF : 19 Pages
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2.6W Stereo Audio Power Amplifier and
DirectDrive Headphone Amplifier
ELECTRICAL CHARACTERISTICS (continued)
(VDD = PVDD = CPVDD = HPVDD = 5V, GND = PGND = CPGND = 0V, SHDN = VDD, CBIAS = 1µF, C1 = C2 = 1µF, speaker load
terminated between OUT_+ and OUT_-, headphone load terminated between HPOUT_ and GND, GAIN1 = GAIN2 = 0V, TA = TMIN to
TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
Output Power (Note 4)
Total Harmonic Distortion
Plus Noise
Signal-to-Noise Ratio
Noise
Capacitive-Load Drive
Crosstalk
POUT
THD+N
SNR
Vn
CL
THD+N = 1%,
f = 1kHz,
TA = +25°C
RL = 8Ω
RL = 4Ω
RL = 3Ω
RL = 8Ω, POUT = 500mW, f = 1kHz
RL = 4Ω, POUT = 1W, f = 1kHz
RL = 8Ω, POUT = 500mW,
BW = 22Hz to 22kHz
BW = 22Hz to 22kHz, A-weighted
No sustained oscillations
L to R, R to L, f = 10kHz
Slew Rate
SR
GAIN1 = 0, GAIN2 = 0
GAIN1 = 1, GAIN2 = 0
Gain (Maximum Volume Setting) AVMAX(SPKR)
GAIN1 = 0, GAIN2 = 1
GAIN1 = 1, GAIN2 = 1
HEADPHONE AMPLIFIER (HPS = VDD)
Output Offset Voltage
VOS
Power-Supply Rejection Ratio
(Note 3)
PSRR
TA = +25°C
HPVDD = 3V to 5.5V, TA = +25°C
f = 1kHz, VRIPPLE = 200mVP-P
f = 10kHz, VRIPPLE = 200mVP-P
Output Power
POUT
THD+N = 1%,
f = 1kHz, TA = +25°C
RL = 32Ω
RL = 16Ω
Total Harmonic Distortion
Plus Noise
THD+N
RL = 32Ω, POUT = 20mW, f = 1kHz
RL = 16Ω, POUT = 75mW, f = 1kHz
Signal-to-Noise Ratio
SNR
RL = 32Ω, POUT = 50mW,
BW = 22Hz to 22kHz
Noise
Capacitive-Load Drive
Crosstalk
Vn
BW = 22Hz to 22kHz
CL
No sustained oscillations
L to R, R to L, f = 10kHz
Off-Isolation
Any unselected input to any active input,
f = 10kHz, input referred
Slew Rate
SR
ESD
ESD
IEC air discharge
Gain
GAIN2 = 0, GAIN1 = X
AV
GAIN2 = 1, GAIN1 = X
MIN TYP MAX UNITS
0.9
1.4
2.3
W
2.6
0.01
%
0.02
90
dB
80
µVRMS
200
pF
75
dB
1.4
V/µs
15
16.5
dB
18
19.5
±2
±7
mV
60
75
73
dB
63
40
50
mW
110
0.007
%
0.03
95
dB
12
µVRMS
200
pF
88
dB
74
0.4
V/µs
±8
kV
0
dB
3
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