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

enced output from a single supply, eliminating the need

for large DC-blocking capacitors, saving board space

and component height. The gain of the amplifier is set

internally (-1.5V/V) on the MAX13330 or adjusted exter-

nally with resistors on the MAX13331.

The MAX13330/MAX13331 deliver 120mW per channel

into a 16

Ω 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 8

Ω, 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

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

Automotive DirectDrive Headphone Amplifiers

with Output Protection and Diagnostics

________________________________________________________________

Maxim Integrated Products

1

MAX13330

MAX13331

OUTR

PGND

OUTL

13

14

15

16

4

3

2

1

SGND

DIAG

12

5

INR

SGND

INL

QSOP

+

PGND

C1N

CPVSS

9

10

11

8

7

6

C1P

CPVDD

SHDN

Pin Configuration

CLICK-AND-POP

SUPPRESSION

RIGHT-CHANNEL

AUDIO IN

LEFT-CHANNEL

AUDIO IN

MAX13330

DIAGNOSTICS

OUTPUT

SHDN

Simplified Block Diagram

19-4341; Rev 3; 7/11

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.

Ordering Information

/V denotes an automotive qualified part.

+

Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

Typical Application Circuits appear at end of data sheet.

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