Datasheet

MAX98090 Ultra-Low Power Stereo Audio Codec
Maxim Integrated │ 37
www.maximintegrated.com
Typical Operating Characteristics
(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)
ANALOG MICROPHONE INPUT TO ADC RECORD PATH OUTPUT
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (MIC TO ADC)
MAX98090 toc01
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
V
IN
= 707mV
RMS
A
V_MIC
= 0dB
C
IN
= 10µF
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (MIC TO ADC)
MAX98090 toc04
FREQUENCY (Hz)
10k1k100
0
10 100k
THD+N RATIO (dB)
-90
-80
-70
-60
-50
-40
-30
-20
-10
-100
f
MCLK
= 12.288MHz
f
LRCLK
= 96kHz
V
IN
= 707mV
RMS
A
V_MIC
= 0dB
C
IN
= 10µF
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (MIC TO ADC)
MAX98090 toc02
FREQUENCY (Hz)
10k1k100
0
10 100k
THD+N RATIO (dB)
-90
-80
-70
-60
-50
-40
-30
-20
-10
f
MCLK
= 13MHz
f
LRCLK
= 44.1kHz
V
IN
= 707mV
RMS
A
V_MIC
= 0dB
C
IN
= 10µF
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (MIC TO ADC)
MAX98090 toc05
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
V
IN
= 70.7mV
RMS
A
V_MIC
= +20dB
C
IN
= 10µF
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (MIC TO ADC)
MAX98090 toc03
FREQUENCY (Hz)
10k1k100
0
10 100k
THD+N RATIO (dB)
-90
-80
-70
-60
-50
-40
-30
-20
-10
-100
f
MCLK
= 12.288MHz
f
LRCLK
= 48kHz
V
IN
= 707mV
RMS
A
V_MIC
= 0dB
C
IN
= 10µF
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY (MIC TO ADC)
MAX98090 toc06
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
V
IN
= 22.4mV
RMS
A
V_MIC
= +30dB
C
IN
= 10µF