Instruction Manual

MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= PV
DD
= CPV
DD
= 3.3V, GND = PGND = CPGND = 0V, SHDN = V
DD
, I
2
C settings (INA gain = +20dB, INB gain = INC gain =
0dB, volume setting = 0dB, mono path gain = 0dB, SHDN = 1, SSM = 1). Speaker load resistors (R
LSP
) are terminated between
OUT+ and OUT-, headphone load resistors are terminated to GND, unless otherwise noted. C1 = C2 = C3 = 1µF. T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DIGITAL OUTPUTS (SDA Open Drain)
Output Low Voltage SDA V
OL
I
SINK
= 6mA 0.4 V
Output Fall Time SDA t
OF
V
H(MIN)
to V
L(MAX)
bus capacitance = 10pF
to 400pF, I
SINK
= 3mA
250 ns
I
2
C INTERFACE TIMING
Serial-Clock Frequency f
SCL
DC 400 kHz
Bus Free Time Between STOP
and START Conditions
t
BUF
1.3 µs
START Condition Hold t
HD:STA
0.6 µs
STOP Condition Setup Time t
SU:STA
0.6 µs
Clock Low Period t
LOW
1.3 µs
Clock High Period t
HIGH
0.6 µs
Data Setup Time t
SU:DAT
100 ns
Data Hold Time t
HD:DAT
0 900 ns
Maximum Receive SCL/SDA Rise
Time
t
R
300 ns
Maximum Receive SCL/SDA Fall
Time
t
F
300 ns
Setup Time for STOP Condition t
SU:STO
0.6 µs
Capacitive Load for Each Bus
Line
C
b
400 pF
Note 1: All devices are 100% production tested at room temperature. All temperature limits are guaranteed by design.
Note 2: Measured at headphone outputs.
Note 3: Amplifier inputs AC-coupled to GND.
Note 4: Testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For R
L
= 8Ω L = 68µH,
R
L
= 4Ω L = 47µH.
Note 5: Testing performed at room temperature with an 8Ω resistive load in series with 68µH inductive load connected across BTL
outputs for speaker amplifier. Testing performed with 32Ω resistive load connected between OUT_ and GND for headphone
amplifier. Testing performed with a 32Ω resistive load connected between OUTRx and GND for mono receiver amplifier.
Mode transitions are controlled by SHDN pin.