Datasheet
Maxim Integrated
│
29
MAX98090 Ultra-Low Power Stereo Audio Codec
www.maximintegrated.com
I
2
C Timing 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 (RHP) 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)
Figure 3. I
2
C Interface Timing Diagram
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
I
2
C TIMING CHARACTERISTICS
Serial Clock Frequency f
SCL
Guaranteed by SCL pulse width low
and high
0 400 kHz
Bus Free Time Between STOP
and START Conditions
t
BUF
1.3 µs
Hold Time (Repeated) START
Condition
t
HD,STA
0.6 µs
SCL Pulse-Width Low t
LOW
1.3 µs
SCL Pulse-Width High t
HIGH
0.6 µs
Setup Time for a Repeated START
Condition
t
SU,STA
0.6 µs
Data Hold Time t
HD,DAT
R
PU
= 475Ω, C
B
= 100pF, 400pF 0 900
nsTransmitting 0 900
Receiving 0
Data Setup Time t
SU,DAT
100 ns
SDA and SCL Receiving Rise Time t
R
(Note 14)
20 + 0.1
x C
B
300 ns
SDA and SCL Receiving Fall Time t
F
(Note 14)
20 + 0.1
x C
B
300 ns
SDA Transmitting Fall Time t
F
R
PU
= 475Ω, C
B
= 100pF to 400pF
(Note 14)
20 + 0.1
x C
B
250 ns
Setup Time for STOP Condition t
SU,STO
0.6 µs
Bus Capacitance C
B
Guaranteed by SDA transmitting fall
time
400 pF
Pulse Width of Suppressed Spike t
SP
0 50 ns
SCL
SDA
t
R
t
F
t
BUF
START
CONDITION
STOP
CONDITION
REPEATED START
CONDITION
START CONDITION
t
SU,STO
t
HD,STA
t
SU,STA
t
HD,DAT
t
SU,DAT
t
LOW
t
HIGH
t
HD,STA
t
SP