MAX13330_09 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – Automotive DirectDrive Headphone Amplifiers with Output Protection and Diagnostics

19-4341; Rev 1; 4/09
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,
patented^† DirectDrive^® 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 (V_BAT up to +45V)
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
♦ 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(Pb)-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
V_DD 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.