Datasheet
Maxim Integrated
│
20
MAX98090 Ultra-Low Power Stereo Audio Codec
www.maximintegrated.com
Digital Filter Specications
(V
AVDD
= V
HPVDD
= V
DVDDIO
= 1.8V, V
DVDD
= 1.2V, V
SPKLVDD
= V
SPKRVDD
= V
SPKVDD
= 3.7V. Receiver load (R
RCV
) connected
between RCVP/LOUTL and RCVN/LOUTR (LINMOD = 0). Line Output loads (R
LOUT
) connected between from RCVP/LOUTL and
RCVN/LOUTR to GND (LINMOD = 1). Headphone loads (R
HP
) connected from HPL or HPR to GND. Speaker loads (Z
SPK
) connected
between SPK_P and SPK_N. R
RCV
= J, R
LOUT
= J, R
HP
= J, Z
SPK
= J. C
REF
= 2.2µF, C
BIAS
= C
MICBIAS
= 1µF, C
C1N-C1P
=
C
CPVDD
= C
CPVSS
= 1µF. A
V_MICPRE_
= A
V_MICPGA_
= A
V_LINEPGA_
= 0dB, A
V_ADCLVL
= A
V_ADCGAIN
= 0dB, A
V_DACLVL
=
A
V_DACGAIN
= 0dB, A
V_MIXGAIN
= 0dB, A
V_RCV
= A
V_LOUT
= A
V_HP
= A
V_SPK
= 0dB. f
MCLK
= 12.288MHz, f
LRCLK
= 48kHz, MAS =
0, 20-bit source data. T
A
= T
MIN
to T
MAX
unless otherwise noted. Typical values are at T
A
= +25°C.) (Notes 2, 10)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RECORD PATH LEVEL CONTROL
Record Level Adjust Range A
V_ADCLVL
AVL/AVR = 0xF to 0x0 (Note 6) -12 +3 dB
Record Level Adjust Step Size 1 dB
Record Gain Adjust Range A
V_ADCGAIN
AVLG/AVRG = 0x0 to 0x3 (Note 6) 0 42 dB
Record Gain Adjust Step Size 6 dB
RECORD PATH VOICE MODE IIR LOWPASS FILTER (MODE = 0)
Passband Cutoff f
PLP
Ripple limit cutoff
0.444
x f
S
Hz
-3dB cutoff
0.449
x f
S
Passband Ripple f < f
PLP
-0.1 0.1 dB
Stopband Cutoff f
SLP
0.47
x f
S
Hz
Stopband Attenuation f > f
SLP
74 dB
RECORD PATH STEREO MUSIC MODE FIR LOWPASS FILTER (MODE = 1, DHF = 0, f
LRCLK
< 50kHz)
Passband Cutoff f
PLP
Ripple limit cutoff
0.43
x f
S
Hz-3dB cutoff
0.48
x f
S
-6.02dB cutoff
0.5
x f
S
Passband Ripple f < f
PLP
-0.1 +0.1 dB
Stopband Cutoff f
SLP
0.58
x f
S
Hz
Stopband Attenuation f < f
SLP
60 dB
RECORD PATH STEREO MUSIC MODE FIR LOWPASS FILTER (MODE = 1, DHF = 1, f
LRCLK
> 50kHz)
Passband Cutoff f
PLP
Ripple Limit cutoff
0.208
x f
S
Hz
-3dB cutoff
0.28
x f
S
Passband Ripple f < f
PLP
-0.1 +0.1 dB
Stopband Cutoff f
SLP
0.45
x f
S
Hz
Stopband Attenuation f < f
SLP
60 dB