MAX9880A 查看數據表（PDF） - Maxim Integrated
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MAX9880A Datasheet PDF : 70 Pages
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Low-Power, High-Performance
Dual I2S Stereo Audio Codec
ELECTRICAL CHARACTERISTICS (continued)
(VAVDD = VPVDD = VMICVDD = VDVDD = VDVDDS1 = +1.8V, RL = ∞, headphone load (RL) connected between _OUTP and _OUTN, dif-
ferential modes, CREF = 2.2µF, CMICBIAS = CPREG = CREG = 1µF, AVPRE = +20dB, AVPGAM = 0dB, AVDAC = 0dB, AVLINE = +20dB,
AVVOL = 0dB, AVLO = 0dB, fMCLK = 13MHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
Total Harmonic
Distortion
THD f = 1kHz, fS = 8kHz, TA = +25°C, -20dB input
ADC Level Adjust
AVADC AVL/AVR = 0xF to 0x0
-12
VAVDD = 1.65V to 1.95V, input referred
60
Power-Supply Rejection
Ratio
PSRR
f = 217Hz, VRIPPLE = 100mVP-P, AVADC = 0dB,
input referred
f = 1kHz, VRIPPLE = 100mVP-P, AVADC = 0dB, input
referred
TYP
-80
80
80
78
MAX UNITS
-70
dB
+3
dB
dB
f = 10kHz, VRIPPLE = 100mVP-P, AVADC = 0dB,
72
input referred
ADC VOICE MODE DIGITAL IIR LOWPASS FILTER
Passband Cutoff
fPLP
With respect to fS within ripple; fS = 8kHz to 48kHz
-3dB cutoff
0.445 x fS
0.449 x fS
Hz
Passband Ripple
f < fPLP
±0.1
dB
Stopband Cutoff
fSLP With respect to fS; fS = 8kHz to 48kHz
0.469 x fS
Hz
Stopband Attenuation
f > fSLP, f = 20Hz to 20kHz
74
dB
ADC VOICE MODE DIGITAL 5th-ORDER IIR HIGHPASS FILTER
AVFLT = 0x1
(Elliptical tuned for 16kHz GSM + 217Hz notch)
0.0161 x
fS
Passband Cutoff
(-3dB from Peak)
fAHPPB
AVFLT = 0x2
(500Hz Butterworth tuned for 16kHz)
AVFLT = 0x3
(Elliptical tuned for 8kHz GSM + 217Hz notch)
0.0312 x
fS
0.0321 x
Hz
fS
AVFLT = 0x4
(500Hz Butterworth tuned for 8kHz)
0.0625 x
fS
AVFLT = 0x5 (fS/240 Butterworth)
0.0042 x fS
AVFLT = 0x1 (Elliptical tuned for 16kHz GSM +
217Hz notch)
0.0139 x
fS
Stopband Cutoff
(-30dB from Peak)
fAHPSB
AVFLT = 0x2 (500Hz Butterworth tuned for 16kHz)
AVFLT = 0x3 (Elliptical tuned for 8kHz GSM +
217Hz notch)
AVFLT = 0x4 (500Hz Butterworth tuned for 8kHz)
AVFLT = 0x5 (fS/240 Butterworth)
DC Attenuation
DCATTEN AVFLT 000
ADC STEREO AUDIO MODE DIGITAL FIR LOWPASS FILTER
0.0156 x fS
0.0279 x
Hz
fS
0.0312 x fS
0.0021 x fS
90
dB
With respect to fS within ripple; fS = 8kHz to 48kHz
0.43 x fS
Passband Cutoff
fPLP -3dB cutoff
0.48 x fS
Hz
-6.02dB cutoff
0.5 x fS
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