EVALUATION KIT AVAILABLE
Click here to ask about the production status of specific part numbers.
MAX13330/MAX13331
Automotive DirectDrive Headphone Amplifiers
with Output Protection and Diagnostics
General Description
Features
The MAX13330/MAX13331 stereo headphone ampli-
fiers are designed for automotive applications requiring
output short-circuit and ESD protection to battery/ground
with diagnostics. These devices use Maxim’s unique
● 4V to 5.5V Single-Supply Operation
● 2MHz Charge Pump Prevents AM Radio Interference
● Ground-Referenced Outputs Eliminate Bulky DC-
Blocking Capacitors
®
DirectDrive architecture to produce a ground-referenced
● Short-to-Ground and Battery (V
up to +45V)
BAT
output from a single supply, eliminating the need for large
DC-blocking capacitors, saving board space and com-
ponent height. The gain of the amplifier is set internally
(-1.5V/V) on the MAX13330 or adjusted externally with
resistors on the MAX13331.
Output Protection, Load Dump Protection
● Short-Circuit Diagnostic Output
● Adjustable Gain (MAX13331) or Fixed -1.5V/V Gain
(MAX13330)
● 125mW per Channel into 32Ω at 0.01% THD+N
● Integrated Click-and-Pop Suppression
● High PSRR Eliminates LDO
The MAX13330/MAX13331 deliver 120mW per channel
into a 16Ω load or 135mW into a 32Ω load and have a low
0.01% THD+N. Low output impedance and the efficient
integrated charge pump allows the device to drive loads
as low as 8Ω, enabling the use of small loudspeakers. An
80dB at 217Hz PSRR allows these devices to operate
from noisy digital supplies without an additional linear reg-
ulator. These devices include ±15kV Human Body Model
ESD protection and short-circuit protection up to +45V at
the headphone outputs. Comprehensive click-and-pop
circuitry suppresses audible clicks and pops on startup
and shutdown. A low-power shutdown mode reduces the
supply current to 3μA (typ).
● No Degradation of Low-Frequency Response Due
to Output Capacitors
● ±15kV Human Body Model ESD Protection for
Output Pins
Ordering Information
TEMP
RANGE
PIN-
PACKAGE
PART
GAIN
MAX13330GEE/V+T -1.5V/V -40°C to +105°C 16 QSOP
The MAX13330/MAX13331 are specified from -40°C to
+105°C AEC-Q100 Level 2 automotive temperature range
and are available in a 16-pin QSOP package.
Externally
MAX13331GEE/V+T
-40°C to +105°C 16 QSOP
Set
/V denotes an automotive qualified part.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Applications
● Automotive Entertainment Systems
Typical Application Circuits appear at end of data sheet.
● Automotive Rear Seat Entertainment Systems
Simplified Block Diagram
Pin Configuration
ꢂ
INL
SGND
INR
OUTL
PGND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
MAX13330
LEFT-CHANNEL
AUDIO IN
V
SS
MAX13330
MAX13331
SGND
OUTR
DIAG
V
CLICK-AND-POP
SUPPRESSION
DD
DIAGNOSTICS
OUTPUT
SHDN
SHDN
CPVDD
C1P
CPVSS
C1N
PGND
RIGHT-CHANNEL
AUDIO IN
ꢀꢁOP
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
19-4341; Rev 5; 3/21