Rainbow Electronics MAX9867 - Manual (Page 6)

MAX9867
Ultra-Low Power Stereo Audio Codec
6 _______________________________________________________________________________________
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ADC VOICE MODE DIGITAL 5th ORDER IIR HIGHPASS FILTER
AVFLT = 0x1
(elliptical tuned for 16kHz GSM + 217Hz
notch)
0.0161
x f S
AVFLT = 0x2
(500Hz Butterworth tuned for 16kHz) 0.0312
x f S
AVFLT = 0x3
(elliptical tuned for 8kHz GSM + 217Hz
notch)
0.0321
x f S
AVFLT = 0x4
(500Hz Butterworth tuned for 8kHz) 0.0625
x f S
5th Order Passband Cutoff
(-3dB from Peak, I
2 C Register
Programmable)
f AHPPB
AVFLT = 0x5
(f
S /240 Butterworth)
0.0042
x f S
Hz
AVFLT = 0x1
(elliptical tuned for 16kHz GSM + 217Hz
notch)
0.0139
x f S
AVFLT = 0x2
(500Hz Butterworth tuned for 16kHz) 0.0156
x f S
AVFLT = 0x3
(elliptical tuned for 8kHz GSM + 217Hz
notch)
0.0279
x f S
AVFLT = 0x4
(500Hz Butterworth tuned for 8kHz) 0.0312
x f S
Stopband Cutoff (-30dB from
Peak)
f AHPSB
AVFLT = 0x5
(f
S /240 Butterworth)
0.0021
x f S
Hz
DC Attenuation DC ATTEN AVFLT ≠ 000 90 dB
ADC STEREO AUDIO MODE DIGITAL FIR LOWPASS FILTER
With respect to f S within ripple;
f S = 8kHz to 48kHz
0.43 x
f S
-3dB cutoff
0.48 x
f S
Passband Cutoff f
PLP
-6.02dB cutoff 0.5 x f S
Hz
Passband Ripple f < f PLP ±0.1 dB
Stopband Cutoff f SLP With respect to f S ; f S = 8kHz to 48kHz
0.58 x
f S
Hz
Stopband Attenuation f > f SLP , f = 20Hz to 20kHz 60 dB
ELECTRICAL CHARACTERISTICS (continued)
(V AVDD = V PVDD = V DVDD = V DVDDIO = +1.8V, R L = ∞, headphone load (R L ) connected between _OUTP and _OUTN in differential
mode, C REF = 2.2μF, C MICBIAS = C PREG = C REG = 1μF, AV PRE = +20dB, AV PGAM = 0dB, AV DAC = 0dB, AV LINE = +20dB, AV VOL =
0dB, MCLK = 13MHz, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 2)