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Maxim Integrated Products - (MAX13330 / MAX13331) Automotive DirectDrive Headphone Amplifiers

Numéro de référence MAX13331
Description (MAX13330 / MAX13331) Automotive DirectDrive Headphone Amplifiers
Fabricant Maxim Integrated Products 
Logo Maxim Integrated Products 





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MAX13331 fiche technique
19-4341; Rev 0; 10/08
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Automotive DirectDrive Headphone Amplifiers
with Output Protection and Diagnostics
General Description
The MAX13330/MAX13331 stereo headphone amplifiers
are designed for automotive applications requiring out-
put short-circuit and ESD protection to battery/ground
with diagnostics. These devices use Maxim’s unique,
patentedDirectDrive® architecture to produce a
ground-referenced output from a single supply, elimi-
nating the need for large DC-blocking capacitors, sav-
ing board space and component height. The gain of the
amplifier is set internally (-1.5V/V) on the MAX13330 or
adjusted externally with resistors on the MAX13331.
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 effi-
cient integrated charge pump allows the device to drive
loads as low as 8Ω, enabling the use of small loud-
speakers. An 80dB at 217Hz PSRR allows these
devices to operate from noisy digital supplies without
an additional linear regulator. 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).
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.
Applications
Automotive Entertainment Systems
Automotive Rear Seat Entertainment Systems
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
U.S. Patent #7,061,327
Simplified Block Diagram
Features
4V to 5.5V Single-Supply Operation
2MHz Charge Pump Prevents AM Radio
Interference
Ground-Referenced Outputs Eliminate Bulky DC-
Blocking Capacitors
Short-to-Ground and Battery (VBAT up to +45V)
Output Protection, Load Dump Protection
Short-Circuit Diagnostic Output
Adjustable Gain (MAX13331) or Fixed -1.5V/V Gain
(MAX13330)
135mW per Channel into 32Ω at 1% THD+N
Low 0.01% THD+N
Integrated Click-and-Pop Suppression
High PSRR Eliminates LDO
No Degradation of Low-Frequency Response Due
to Output Capacitors
±15kV Human Body Model ESD Protection for
Output Pins
Ordering Information
PART
GAIN
TEMP
RANGE
PIN-
PACKAGE
MAX13330GEE/V+T -1.5V/V -40°C to +105°C 16 QSOP
MAX13331GEE/V+T
Externally
Set
-40°C to +105°C
16 QSOP
+Denotes a lead-free/RoHS-compliant package.
T = Tape-and-reel.
/V denotes an automotive qualified part.
Typical Application Circuits appear at end of data sheet.
Pin Configuration
LEFT-CHANNEL
AUDIO IN
MAX13330
SHDN
RIGHT-CHANNEL
AUDIO IN
CLICK-AND-POP
SUPPRESSION
DIAGNOSTICS
OUTPUT
INL 1 +
SGND 2
INR 3
SGND 4
VDD 5
SHDN 6
CPVDD 7
C1P 8
MAX13330
MAX13331
16 OUTL
15 PGND
14 VSS
13 OUTR
12 DIAG
11 CPVSS
10 C1N
9 PGND
QSOP
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

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