MAX9723
Stereo DirectDrive Headphone Amplifier
with BassMax, Volume Control, and I2C
4
_______________________________________________________________________________________
TIMING CHARACTERISTICS
(VDD = SHDN = 3V, PGND = SGND = 0V, C1 = C2 = 1F, BB_ = 0V, gain = 0dB, maximum volume, BassMax disabled. Load connect-
ed between OUT_ and SGND where specified. TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C, see
Timing Diagram.) (Notes 1, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Serial Clock Frequency
fSCL
0
400
kHz
Bus Free Time Between a STOP
and a START Condition
tBUF
1.3
s
START Condition Hold Time
tHD:STA
0.6
s
Low Period of the SCL Clock
tLOW
1.3
s
High Period of the SCL Clock
tHIGH
0.6
s
Setup Time for a Repeated
START Condition
tSU:STA
0.6
s
Data Hold Time
tHD:DAT
0
0.9
s
Data Setup Time
tSU:DAT
100
ns
Maximum Rise Time of SDA and
SCL Signals
tr
300
ns
Maximum Fall Time of SDA and
SCL Signals
tf
300
ns
Setup Time for STOP Condition
tSU:STO
0.6
s
Pulse Width of Suppressed Spike
tSP
100
ns
Maximum Capacitive Load for
Each Bus Line
CL_BUS
400
pF
Note 1: All specifications are 100% tested at TA = +25°C. Temperature limits are guaranteed by design.
Note 2: Inputs AC-coupled to SGND.
Note 3: Guaranteed by design.
Note 4: Headphone mode testing performed with a 32
Ω resistive load connected to GND. Mode transitions are controlled by
SHDN. The KCP level is calculated as: 20 x log [(level peak voltage during mode transition, no input signal)/(peak voltage
under normal operation at rated power)]. Units are expressed in dB.
Note 5: Output power MIN is specified at TA = +25°C.