Datasheet

MAX98090 Ultra-Low Power Stereo Audio Codec
Maxim Integrated │ 58
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 SPEAKER OUTPUT
WIDEBAND FREQUENCY SPECTRUM
(DAC TO SPEAKER)
MAX98090 toc121
FREQUENCY (MHz)
AMPLITUDE (dBV)
101
-100
-80
-60
-40
-20
0
-120
0.1 100
f
MCLK
= 12.88MHz
f
LRCLK
= 48kHz
A
V_SPKPGA
= 0dB
Z
SPK
= 8W + 68µH
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (LINE TO SPEAKER)
MAX98090 toc122
OUTPUT POWER (W)
THD+N RATIO (dB)
0.2 0.4 0.6 0.8
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
0 1.0
A
V_LINEPGA
= 0dB
A
V_SPKPGA
= +8dB
Z
SPK
= 8I + 68µH
C
IN
= 10µF
f = 6000Hz
f = 100Hz
f = 1000Hz
GAIN vs. FREQUENCY
(LINE TO SPEAKER)
MAX98090 toc124
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
10k1k100
-4
-3
-2
-1
0
1
2
3
4
5
-5
10 100k
A
V_LINEPGA
= 0dB
A
V_SPKPGA
= +8dB
Z
SPK
= 8I + 68µH
C
IN
= 10µF
10k1k10010 100k
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (LINE TO SPEAKER)
MAX98090 toc123
FREQUENCY (Hz)
THD+N RATIO (dB)
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
A
V_LINEPGA
= 0dB
A
V_SPKPGA
= +8dB
Z
SPK
= 8I + 68µH
C
IN
= 10µF
P
OUT
= 0.60W
P
OUT
= 0.15W
INBAND OUTPUT SPECTRUM,
-60dBFS INPUT (DAC TO SPEAKER)
MAX98090 toc120
FREQUENCY (kHz)
OUTPUT AMPLITUDE (dBV)
15105
-120
-100
-80
-60
-40
0
-20
20
-160
-140
02
0
f
MCLK
= 12.88MHz
f
LRCLK
= 48kHz
A
V_SPKPGA
= -6dB
Z
SPK
= 4I + 33µH
DAC PLAYBACK PATH INPUT TO SPEAKER OUTPUT (CONTINUED)