Ultra-Low Power Stereo Audio Codec
ELECTRICAL CHARACTERISTICS (continued)
(V
= V
REF
= V
= 2.2µF, C
= V
MICBIAS
= +1.8V, R = ∞, headphone load (R ) connected between _OUTP and _OUTN in differential
AVDD
PVDD
DVDD
DVDDIO
= C
L
L
mode, C
= C
= 1µF, AV
= +20dB, AV
= 0dB, AV
= 0dB, AV
= +20dB, AV
=
PREG
REG
PRE
PGAM
DAC
LINE
VOL
0dB, MCLK = 13MHz, T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.) (Note 2)
MAX A
A
MIN
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
MAX9867
S
AVFLT = 0x2
(500Hz Butterworth tuned for 16kHz)
0.0312
x f
S
5th Order Passband Cutoff
(-3dB from Peak, I2C Register
Programmable)
AVFLT = 0x3
(elliptical tuned for 8kHz GSM + 217Hz
notch)
f
Hz
AHPPB
0.0321
x f
S
AVFLT = 0x4
(500Hz Butterworth tuned for 8kHz)
0.0625
x f
S
AVFLT = 0x5
(f /240 Butterworth)
S
0.0042
x f
S
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
Stopband Cutoff (-30dB from
Peak)
AVFLT = 0x3
(elliptical tuned for 8kHz GSM + 217Hz
notch)
f
Hz
AHPSB
0.0279
x f
S
AVFLT = 0x4
(500Hz Butterworth tuned for 8kHz)
0.0312
x f
S
AVFLT = 0x5
(f /240 Butterworth)
S
0.0021
x f
S
DC Attenuation
DC
AVFLT ≠ 000
90
dB
Hz
ATTEN
ADC STEREO AUDIO MODE DIGITAL FIR LOWPASS FILTER
With respect to f within ripple;
0.43 x
f
S
S
f
S
= 8kHz to 48kHz
Passband Cutoff
f
f
PLP
SLP
0.48 x
-3dB cutoff
f
S
-6.02dB cutoff
0.5 x f
0.1
S
Passband Ripple
Stopband Cutoff
f < f
dB
Hz
dB
PLP
0.58 x
With respect to f ; f = 8kHz to 48kHz
S
S
f
S
Stopband Attenuation
f > f , f = 20Hz to 20kHz
SLP
60
6
_______________________________________________________________________________________