Rainbow Electronics MAX13331 - Manual

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
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)
♦ 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
MAX13330/MAX13331
Automotive DirectDrive Headphone Amplifiers
with Output Protection and Diagnostics
________________________________________________________________ Maxim Integrated Products 1
MAX13330
MAX13331
OUTR
V SS
PGND
OUTL
13
14
15
16
4
3
2
1
SGND
DIAG 12 5 V
DD
INR
SGND
INL
QSOP
+
PGND
C1N
CPVSS
9
10
11
8
7
6
C1P
CPVDD
SHDN
Pin Configuration
CLICK-AND-POP
SUPPRESSION
OUTPUT PROTECTION & DIAGNOSTICS
RIGHT-CHANNEL
AUDIO IN
LEFT-CHANNEL
AUDIO IN
MAX13330
DIAGNOSTICS
OUTPUT SHDN
Simplified Block Diagram
19-4341; Rev 0; 10/08
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.
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
† U.S. Patent #7,061,327
Ordering Information
+ 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.
PART GAIN
TEMP
RANGE
PIN-
PACKAGE
M A X1 3 3 3 0 GE E /V + T -1.5V/V - 40°C to + 105°C 16 QSOP
M A X1 3 3 3 1 GE E /V + T
E xter nal l y
Set
- 40°C to + 105°C 16 QSOP