Datasheet

MAX13330/MAX13331
Automotive DirectDrive Headphone Amplifiers
with Output Protection and Diagnostics
_______________________________________________________________________________________ 7
Pin Description
Typical Operating Characteristics (continued)
(V
DD
= V
CPVDD
= 5V, V
SGND
= V
PGND
= 0V, C1 = C2 = 1µF, R
L
= ∞, gain = -1.5V/V, THD+N measurement bandwidth = 22Hz to 22kHz,
T
A
= +25°C, unless otherwise noted.)
PIN NAME FUNCTION
1 INL Inverting Left-Channel Audio Input
2, 4 SGND
Amplifier Signal Ground. The noninverting inputs of the amplifiers are connected to the amplifier
signal ground. Connect both to the signal ground plane.
3 INR Inverting Right-Channel Audio Input
5V
DD
Amplifier Positive-Power Supply. Connect to positive supply. Bypass with a 1µF capacitor to
SGND as close to the pin as possible.
6 SHDN Active-Low Shutdown Input
7 CPVDD
Charge-Pump Power Supply. Powers charge-pump inverter, charge-pump logic, and oscillator.
Connect to positive supply. Bypass with a 1µF capacitor to PGND as close to the pin as possible.
8 C1P Flying-Capacitor Positive Terminal. Connect a 1µF capacitor between C1P and C1N.
9, 15 PGND Power Ground. Connect both to the power ground plane.
10 C1N Flying-Capacitor Negative Terminal. Connect a 1µF capacitor between C1P and C1N.
11 CPVSS Charge-Pump Output. Connect to V
SS
and bypass with a 1µF capacitor to PGND.
12 DIAG Diagnostic Voltage Output
13 OUTR Right-Channel Output
14 V
SS
Amplifier Negative Power Supply. Connect to CPVSS.
16 OUTL Left-Channel Output
ENTERING SHUTDOWN TRANSIENT
MAX13330/31 toc27
200
μ
s/div
V
OUTL
1V/div
V
OUTR
1V/div
V
SHDN
5V/div
POWER-UP/-DOWN TRANSIENT
MAX13330/31 toc28
10ms/div
V
OUTL
1V/div
V
OUTR
1V/div
V
SHDN
5V/div