Datasheet
MAX98090 Ultra-Low Power Stereo Audio Codec
Maxim Integrated
│
66
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)
LINE INPUT TO HEADPHONE OUTPUT
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
(LINE TO HEADPHONE)
MAX98090 toc162
OUTPUT POWER (W)
THD+N RATIO (dB)
0.040.030.020.01
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-120
-100
-110
0 0.05
A
V_LINEPGA
= 0dB
A
V_HP
= +3dB
R
HP
= 32I
C
IN
= 10µF
f
IN
= 100Hz
f
IN
= 1000Hz
f
IN
= 6000Hz
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
(LINE TO HEADPHONE)
MAX98090 toc163
FREQUENCY (Hz)
THD+N RATIO (dB)
10k1k10010 100k
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
P
OUT
= 10mW
P
OUT
= 20mW
A
V_LINEPGA
= 0dB
A
V_HP
= +8dB
R
HP
= 32I
C
IN
= 10µF
GAIN vs. FREQUENCY
(LINE TO HEADPHONE)
MAX98090 toc164
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
10k1k10010 100k
-4
-3
-2
-1
0
1
2
3
4
5
-5
A
V_LINEPGA
= 0dB
A
V_HP
= 0dB
R
HP
= 32I
C
IN
= 10µF
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (LINE TO HEADPHONE)
MAX98090 toc165
FREQUENCY (Hz)
PSRR (dB)
10k1k10010 100k
20
40
60
80
100
120
0
BIAS_MODE = 0
BIAS_MODE = 1
V
RIPPLE
= 100mV
P-P
R
HP
= 32I
C
IN
= 10µF
CROSSTALK vs. FREQUENCY
(LINE TO HEADPHONE)
MAX98090 toc166
FREQUENCY (Hz)
CROSSTALK (dB)
10k1k10010 100k
f
MCLK
= 12.288MHz
f
LRCLK
= 48kHz
A
V_HP
= 0dB
R
HP
= 32I
LEFT TO RIGHT
RIGHT TO LEFT
-100
-80
-60
-40
-20
0
-120
COMMON-MODE REJECTION RATIO
vs. FREQUENCY (LINE TO HEADPHONE)
MAX98090 toc167
FREQUENCY (Hz)
CMRR (dBV)
10k1k10010 100k
10
20
30
40
50
60
70
80
90
100
0
R
HP
= 32I
C
IN
= 10µF
A
V_HP
= 0dB
A
V_LINEPGA
= 0dB