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
STEREO AUDIO MODE DC BLOCKING HIGHPASS FILTER (MODE1 = 1)
Passband Cutoff
(-3dB from Peak)
f
AHPPB
AVFLT ≠ 000
0.000125
x f
S
Hz
DC Attenuation DC
Atten
AVFLT ≠ 000
90 dB
MICROPHONE AUTOMATIC GAIN CONTROL
AGC Hold Duration
AGCHLD = 01 50
ms
AGCHLD = 11 400
AGC Attack Time
AGCATK = 00 2
ms
AGCATK = 11 123
AGC Release Time
AGCRLS = 000 0.078
s
AGCRLS = 111 10
AGC Threshold Level AGCTH = 0x0 to 0xF -3 +18 dB
AGC Threshold Step Size 1 dB
AGC Gain (Note 5) 0 20 dB
ADC NOISE GATE
NG Threshold Level ANTH = 0x3 to 0xF, referred to 0dBFS -64 -16 dB
NG Attenuation (Note 5) 0 12 dB
ADC-TO-DAC DIGITAL SIDETONE (MODE = 0)
Sidetone Gain Adjust Range AV
STGA
DVST = 0x01 -0.5
dB
DVST = 0x1F -60.5
Sidetone Gain Adjust Step
Size
2 dB
Sidetone Path Phase Delay
1kHz, 0dB input, highpass filter
disabled
8kHz 2.2
ms
16kHz 1.1
ADC-TO-DAC DIGITAL LOOP-THROUGH PATH
Dynamic Range (Note 4) DR
f
S
= 48kHz, MCLK = 12.288MHz, MODE = 1
(FIR audio), MIC to HP output, T
A
= +25NC
83 93 dB
Total Harmonic Distortion +
Noise
THD+N
f = 1kHz, f
S
= 48kHz, MCLK = 12.288MHz, MODE =
1 (FIR audio), MIC to HP output
81 dB
DAC LEVEL CONTROL
DAC Attenuation Range AV
DACATTN
DV_ = 0xF to 0x0 (Note 5) -15 0 dB
DAC Attenuation Step Size 1 dB
DAC Gain Adjust Range AV
DACGAIN
DV1G = 00 to 11 (Note 5) 0 18 dB
DAC Gain Adjust Step Size 6 dB