User Manual

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MAX98089
Low-Power, Stereo Audio Codec
with FlexSound Technology
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
PVDD
= V
DVDD
= V
DVDDS1
= V
DVDDS2
= 1.8V, V
SPKLVDD
= V
SPKRVDD
= 3.7V. Speaker loads (Z
SPK
) connected between
SPK_P and SPK_N. Receiver load (R
REC
) connected between RECP and RECN. Headphone loads (R
HP
) connected from HPL or HPR
to HPGND. Line out loads (R
LOUT
) connected from LOUTL or LOUTR to SPKLGND. R
LOAD
= R
HP
= J, R
REC
= J, Z
SPK
= J, C
REF
=
2.2FF, C
MICBIAS
= C
REG
= 1FF, C
C1N-C1P
= 1FF, C
HPVDD
= C
HPVSS
= 1FF. AV
MICPRE_
= +20dB, AV
MICPGA_
= 0dB, AV
DACATTN
=
0dB, AV
DACGAIN
= 0dB, AV
ADCLVL
= 0dB, AV
ADCGAIN
= 0dB, AV
PGAIN_
= 0dB, AV
HP_
= 0dB, AV
REC
= 0dB, AV
SPK_
= 0dB, MCLK
= 12.288MHz, LRCLK = 48kHz, MAS = 0. T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25NC.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Volume Control Step Size
+8dB to +6dB 0.5
dB
+6dB to +0dB 1
0dB to -14dB 2
-14dB to -38dB 3
-38dB to -64dB 4
Mute Attenuation f = 1kHz 86 dB
Output Offset Voltage V
OS
AV
SPK_
= -61dB, T
A
= +25NC Q0.5 Q3
mV
EXCURSION LIMITER
Upper Corner Frequency
Range
DHPUCF = 001 to 100 400 1000 Hz
Lower Corner Frequency DHPLCF = 01 to 10 400 Hz
Biquad Minimum Corner
Frequency
DHPUCF = 000 (fixed mode) 100
Hz
DHPUCF = 001 200
DHPUCF = 010 300
DHPUCF = 011 400
DHPUCF = 100 500
Threshold Voltage
Z
SPK
= 8I + 68FH, V
SP-
KLVDD
= V
SPKRVDD
= 5.5V,
AV
SPK_
= 8dB
DHPTH = 000 0.34
V
P
DHPTH = 111 0.95
Release Time
ALCRLS = 101 0.25
s
ALCRLS = 000 4
POWER LIMITER
Attenuation -64 dB
Threshold
Z
SPK
= 8I + 68FH, V
SP-
KLVDD
= V
SPKRVDD
= 5.5V,
AV
SPK_
= 8dB
PWRTH = 0x1 0.08
W
PWRTH = 0xF 1.23
Time Constant 1 t
PWR1
PWRT1 = 0x1 0.5
s
PWRT1 = 0xF 8.7
Time Constant 2 t
PWR2
PWRT2 = 0x1 to 0xF 0.5
min
PWRT2 = 0xF 8.7
Weighting Factor
k
PWR
PWRK = 000 to 111 12.5 100 %
DISTORTION LIMITER
Distortion Limit
THDCLP = 0x1 < 1
%
THDCLP = 0xF 24
Release Time Constant
THDT1 = 000 0.76
s
THDT1 = 111 6.2