Datasheet

Maxim Integrated │ 21
MAX98090 Ultra-Low Power Stereo Audio Codec
www.maximintegrated.com
Digital Filter Specications (continued)
(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 DC-BLOCKING HIGHPASS FILTER
DC Attenuation A
V_ADCHPF
AHPF = 1 90 dB
RECORD PATH PROGRAMMALE BIQUAD FILTER
Preattenuator Gain Range -15 0 dB
Preattenuator Step Size 1 dB
Cutoff Frequency
Highpass lter
0.0008
x f
S
Hz
High-frequency shelving lter
0.02
x f
S
Lowpass lter
0.002
x f
S
Low-frequency shelving lter
0.0008
x f
S
Peak lter
0.0008
x f
S
Quality Factor Q Peak lter 10
DIGITAL SIDETONE: RECORD PATH TO PLAYBACK PATH (MODE = 0)
Sidetone Level Adjust Range A
V_STLVL
DVST = 0x1F to 0x01 -60.5 -0.5 dB
Sidetone Level Adjust Step Side 2 dB
Sidetone Path Phase Delay
f
IN
= 1kHz, full-scale amplitude,
highpass lter disabled
f
S
= 8kHz 1.8
ms
f
S
= 16kHz 0.9
PLAYBACK PATH LEVEL CONTROL
Playback Path Attenuation
Range
A
V_DACLVL
DV = 0xF to 0x0 (Note 6) -15 0 dB
Playback Path Attenuation Step
Size
1 dB
Playback Path Gain Adjust
Range
A
V_DACGAIN
DVG = 00 to 11 (Note 6) 0 18 dB