Datasheet

Maxim Integrated │ 15
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
Line Output Volume
Control (PGA)
A
V_LOUTPGA
(Notes 6 and 9)
RCV_VOL = 0x00 -63 -61 -59.5
dB
RCV_VOL = 0x1F +7.2 +8 +8.75
Volume Control Step Size
(Note 9)
8dB to 6dB 0.5
dB
6dB to 0dB 1
0dB to -14dB 2
-14dB to -38dB 3
-38dB to -62dB
4
Mute Attenuation f = 1kHz 87 97 dB
Capacitive Drive Capability
No sustained
oscillations
R
LOUT
= 1kW 500
pF
R
LOUT
= ∞ 100
DAC PLAYBACK PATH TO SPEAKER AMPLIFIER PATH
Dynamic Range (Note 5) DR 91 dB
Total Harmonic Distortion + Noise THD+N
f = 1kHz, P
OUT
= 200mW, Z
SPK
= 8W +
68µH, f
MCLK
= 12.288MHz
-70 dB
Crosstalk
SPKL to SPKR and SPKR to SPKL,
P
OUT
= 640mW, f = 1kHz
-104 dB
Output Noise 27 µV
RMS
DIFFERENTIAL ANALOG INPUT TO SPEAKER AMPLIFIER PATH
Dynamic Range (Note 5) DR Output referenced to 2V
RMS
91 dB
Total Harmonic Distortion + Noise THD+N
f = 1kHz, P
OUT
= 200mW,
Z
SPK
= 8W + 68mH
-70 dB
Output Noise 28 µV
RMS
Power-Supply Rejection Ratio
(Note 3)
PSRR
V
SPK_VDD
= 2.8V to 5.5V 50 80
dB
V
RIPPLE
= 100mV
P-P
f = 217Hz 68
f = 1kHz 67
f = 10kHz
61