Datasheet
Maxim Integrated
│
18
MAX98090 Ultra-Low Power Stereo Audio Codec
www.maximintegrated.com
Electrical 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
) connected
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)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Power-Supply Rejection Ratio
(Note 3)
PSRR
V
AVDD
= V
HPVDD
= 1.65V to 2.0V 40 60
dB
V
RIPPLE
= 100mV
P-P
,
A
V_TOTAL
= 0dB
f = 217Hz 61
f = 1kHz 61
f = 10kHz
60
HEADPHONE AMPLIFIER (Note 7)
Output Power P
OUT
f = 1kHz, THD = 1%
R
HP
= 16W 20 40
mW
R
HP
= 32W 30
Total Harmonic Distortion + Noise THD+N
R
HP
= 16W, P
OUT
= 10mW, f = 1kHz -88 -77
dB
R
HP
= 10kW, V
OUT
= 1V
RMS
,
f = 1kHz
-88
Full-Scale Output A
VHP
= 0dB (Note 8) 1 V
RMS
Headphone Volume Control (PGA) A
V_HPPGA
HPVOL_ = 0x00 -69 -67 -65
dB
HPVOL_ = 0x1F 2.5 3 3.5
Volume Control Step Size
(Note 9)
+3dB to +1dB 0.5
dB
+1dB to -5dB 1
-5dB to -19dB 2
-19dB to -43dB 3
-43dB to -67dB 4
Mute Attenuation f = 1kHz 110 dB
Output Offset Voltage V
OS
AV_HP = -67dB
T
A
= +25°C ±0.5 ±1
mV
T
A
= T
MIN
to T
MAX
±3
Capacitive Drive Capability
No sustained
oscillations
R
HP
= 32W 500
pF
R
HP
= ∞
100
Click-and-Pop Level K
CP
Peak voltage,
A-weighted,
32 samples
per second,
A
V_HP
= -67dB
Into shutdown -73
dBV
Out of shutdown
-73
JACK DETECTION
JACKSNS High Threshold V
TH_HIGH
MICBIAS enabled
0.80 x
V
MICBIAS
0.95 x
V
MICBIAS
0.98 x
V
MICBIAS
V
MICBIAS disabled
0.80 x
V
SPKLVDD
0.95 x
V
SPKLVDD
0.98 x
V
SPKLVDD