MAX9879
Stereo Class D Audio Subsystem
with DirectDrive Headphone Amplifier
ELECTRICAL CHARACTERISTICS (continued)
(V
= V
= V
= 3.7V, V
= 1.8V, V
= V
= V
= 0. Single-ended inputs, preamp = 0, volume controls =
DD
PVDDL
PVDDR
CCIO
GND
PGNDL
PGNDR
0dB, BYPASS = 0, SHDN = 1. Speaker loads connected between OUT_+ and OUT_-. Headphone loads connected from HPL or HPR to
GND. R = ∞, R = ∞. C1 = C2 = C = 1µF. T = T to T , unless otherwise noted. Typical values are at T = +25°C.)
SPK
HP
BIAS
A
MIN
MAX
A
(Notes 3, 4)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input Voltage High (SHDN)
Input Voltage Low (SHDN)
Input Hysteresis (SHDN)
V
1.4
V
V
IH
V
0.4
IL
V
100
10
mV
HYS
SDA, SCL, SHDN Input
Capacitance
C
pF
IN
Input Leakage Current
I
I
SDA, SCL, SHDN, T = +25°C
1.0
1.0
µA
µA
IN
IN
A
Input Leakage Current
V
= 0, T = +25°C
CCIO A
DIGITAL OUTPUTS (SDA open drain)
Output Low-Voltage SDA
V
I
I
= 3mA
= 3mA
0.4
V
V
OL
SINK
V
-
CCIO
0.4
Output High-Voltage SDA
V
OH
SINK
V
to V
bus capacitance
L(MAX)
H(MIN)
Output Fall Time SDA
t
250
ns
OF
= 10pF to 400pF, I
= 3mA
SINK
2-WIRE INTERFACE TIMING
External Pullup Voltage Range
(SDA and SCL)
1.7
DC
1.3
3.6
V
Serial-Clock Frequency
f
400
kHz
µs
SCL
Bus Free Time Between STOP
and START Conditions
t
BUF
START Condition Hold
START Condition Setup Time
Clock Low Period
t
0.6
0.6
1.3
0.6
100
0
µs
µs
µs
µs
ns
ns
HD:STA
t
SU:STA
t
LOW
Clock High Period
Data Setup Time
t
HIGH
t
SU:DAT
HD:DAT
Data Hold Time
t
900
300
20 +
0.1 x C
SCL/SDA Receiving Rise Time
SCL/SDA Receiving Fall Time
t
(Note 6)
ns
ns
R
B
20 +
0.1 x C
t
300
F
F
B
B
20 +
0.1 x C
V
V
=1.8V (Note 6)
250
250
CCIO
CCIO
SDA Transmitting Fall Time
t
ns
20 +
0.05 x C
= 3.6V (Note 6)
B
6
Maxim Integrated