MAX9879 查看數據表（PDF） - Maxim Integrated
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MAX9879 Datasheet PDF : 32 Pages
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MAX9879
Stereo Class D Audio Subsystem
with DirectDrive Headphone Amplifier
ELECTRICAL CHARACTERISTICS (continued)
(VDD = VPVDDL = VPVDDR = 3.7V, VCCIO = 1.8V, VGND = VPGNDL = VPGNDR = 0. Single-ended inputs, preamp = 0, volume controls =
0dB, BYPASS = 0, SHDN = 1. Speaker loads connected between OUT_+ and OUT_-. Headphone loads connected from HPL or HPR to
GND. RSPK = ∞, RHP = ∞. C1 = C2 = CBIAS = 1µF. TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
(Notes 3, 4)
PARAMETER
Current Limit
Efficiency
Speaker Gain
Output Noise
Crosstalk
HEADPHONE AMPLIFIERS
Output Offset Voltage
SYMBOL
CONDITIONS
η
POUT = 600mW, f = 1kHz
AV
A-weighted, (ENA = 1 and ENB = 0
or ENA = 0 and ENB = 1), ΔIN_ = 0
OUTL to OUTR, OUTR to OUTL,
f = 20Hz to 20kHz
MIN TYP MAX UNITS
1.5
A
88
%
17.4
18
18.4
dB
63
µVRMS
75
dB
TA = +25°C (volume at mute)
VOS TA = +25°C (Volume at 0dB, ENA = 1 and
ENB = 0 or ENA = 0 and ENB = 1, ΔIN_ = 0)
±0.22 ±0.85 mV
±1.5
mV
Click-and-Pop Level
Power-Supply Rejection Ratio
(Note 5)
Output Power
Headphone Gain
Channel-to-Channel Gain
Tracking
Peak voltage, TA = 25°C Into shutdown
-75
KCP
A-weighted, 32 samples
per second, volume at Out of shutdown
-75
dBV
mute (Note 5)
PSRR TA = +25°C
POUT
AV
THD+N = 1%
PVDD_ = VDD
70
85
= 2.7V to 5.5V
f = 217Hz,
VRIPPLE
= 100mVP-P
f = 1kHz,
84
dB
VRIPPLE
80
= 100mVP-P
f = 20kHz,
VRIPPLE
= 100mVP-P
RHP = 16Ω
RHP = 32Ω
62
58
mW
54
2.6
3
3.4
dB
TA = +25°C, HPL to HPR, volume at 0dB,
ENA=1 and ENB = 0 or ENA = 1 and ENB
= 0, ΔIN_ = 0
±0.3 ±2.5
%
Total Harmonic Distortion + Noise
THD+N
RHP = 32Ω
(POUT = 10mW, f = 1kHz)
RHP = 16Ω
(POUT = 10mW, f = 1kHz)
0.018
%
0.037 0.08
4
Maxim Integrated
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