Datasheet
MAX98090 Ultra-Low Power Stereo Audio Codec
Maxim Integrated
│
45
www.maximintegrated.com
Typical Operating Characteristics (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
) con-
nected 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.) (Note 2)
DAC PLAYBACK PATH INPUT TO RECEIVER OUTPUT
MAX98090 toc47
FREQUENCY (kHz)
OUTPUT AMPLITUDE (dBFS)
15105
02
0
-140
-120
-100
-80
-60
-40
-20
0
20
-160
f
MCLK
= 13MHz
f
LRCLK
= 44.1kHz
A
V_TOTAL
= 0dB
R
HP
= 32I
C
IN
= 10µF
INBAND OUTPUT SPECTRUM,
-60dBFS INPUT
(LINE TO ADC TO DAC TO HEADPHONE)
MAX98090 toc48
FREQUENCY (kHz)
OUTPUT AMPLITUDE (dBFS)
15105
02
0
-140
-120
-100
-80
-60
-40
-20
0
20
-160
f
MCLK
= 12.288MHz
f
LRCLK
= 48kHz
A
V_TOTAL
= 0dB
R
HP
= 32
I
C
IN
= 10µF
INBAND OUTPUT SPECTRUM,
-3dBFS INPUT
(LINE TO ADC TO DAC TO HEADPHONE)
MAX98090 toc49
FREQUENCY (kHz)
OUTPUT AMPLITUDE (dBFS)
15105
02
0
-140
-120
-100
-80
-60
-40
-20
0
20
-160
f
MCLK
= 12.288MHz
f
LRCLK
= 48kHz
A
V_TOTAL
= 0dB
R
HP
= 32I
C
IN
= 10µF
INBAND OUTPUT SPECTRUM,
-60dBFS INPUT
(LINE TO ADC TO DAC TO HEADPHONE)
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
(DAC TO RECEIVER)
MAX98090 toc50
OUTPUT POWER (W)
THD+N RATIO (dB)
0.100.080.060.040.02
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
0 0.12
BIAS_MODE = 0
f
MCLK
= 13MHz
f
LRCLK
= 8kHz
A
V_REC
= +8dB
R
REC
= 32I
f
IN
= 100Hz
f
IN
= 1000Hz
f
IN
= 3000Hz
TOTAL HARMONIC DISTORTION
vs. OUTPUT POWER (DAC TO RECEIVER)
MAX98090 toc51
OUTPUT POWER (W)
THD+N RATIO (dB)
0.100.080.060.040.02
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
0 0.12
BIAS_MODE = 1
f
MCLK
= 13MHz
f
LRCLK
= 8kHz
A
V_REC
= +8dB
R
REC
= 32I
f
IN
= 100Hz
f
IN
= 1000Hz
f
IN
= 3000Hz
ADC RECORD PATH TO DAC PLAYBACK INTERNAL LOOP THROUGH (CONTINUED)
TOTAL HARMONIC DISTORTION
vs. FREQUENCY (DAC TO RECEIVER)
MAX98090 toc52
FREQUENCY (Hz)
THD+N RATIO (dB)
1k10010 10k
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
f
MCLK
= 13MHz
f
LRCLK
= 8kHz
A
V_REC
= +8dB
R
REC
= 32I
P
OUT
= 25mW
P
OUT
= 50mW