Rainbow Electronics MAX9892 User Manual

General Description

The MAX9892 is an audio click-and-pop eliminator for
portable multimedia devices. Operating from a 1.7V to

3.6V supply, the MAX9892 connects to the output of the
existing system amplifier and provides a low-imped­ance path to ground during startup and shutdown. The
inputs INL and INR accept voltage swings from V

DD

to

5.5V below V

DD

. See the

Setting the Supply Voltage

section for more information. The power-up and power­down transients are shunted to ground to prevent clicks
and pops from becoming audible.

The MAX9892 features two low-impedance analog
switches controlled by MUTE that opens and closes the
switches. The switches are open during normal opera­tion and have no impact on the output signal. During
startup and shutdown of the amplifier, the MAX9892
can be activated to short the outputs to ground and
prevent clicks and pops from pulling current through
the headphones.

The MAX9892 is available in 6-bump UCSP (1mm x

1.52mm x 0.6mm) and 6-pin µDFN (2mm x 2mm x

0.75mm) packages. The MAX9892 is specified over the

-40°C to +85°C temperature range.

Applications

Mobile Phones

Smart Phones

Mobile Internet Devices

Portable Gaming Consoles

Portable Media Players

Notebook Computers

Features

♦ Distortion-Free, Click-and-Pop Elimination

♦ Less than 1µA Supply Current

♦ 1.7V to 3.6V Single-Supply Operation

♦ Tiny Packages

6-Bump UCSP (1mm x 1.52mm x 0.6mm)
6-Pin µDFN (2mm x 2mm x 0.75mm)

MAX9892

Shunt Mode Audio Click-and-Pop Eliminator

________________________________________________________________

Maxim Integrated Products

1

19-4295; 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.

+

Denotes a lead-free/RoHS-compliant package.

123

A

B

UCSP

TOP VIEW

(BUMPS ON BOTTOM)

INL

GND

INR

V

DD

SET

MUTE

4

3

INL

MUTE

5

2

GND

V

DD

6

1

INR

SET

μDFN

TOP VIEW

MAX9892

MAX9892

+

Pin Configurations

MAX9892

MUTE

SET

C

SET

V

DD

GND

1.7V TO 3.6V

HEADPHONE

AMPLIFIER

INL INR

R

SERIES

R

SERIES

0.1μF

Typical Operating Circuit

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX9892ERT+ -40°C to +85°C 6 UCSP

MAX9892ELT+ -40°C to +85°C 6 µDFN

MAX9892

Shunt Mode Audio Click-and-Pop Eliminator

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= 3.0V, V

GND

= 0, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

VDD, MUTE, SET to GND..........................................-0.3V to +6V

INL, INR to GND.................................(V

DD

- 6V) to (VDD+ 0.3V)

Continuous Current In/Out of V

DD

......................................30mA

Continuous Current In/Out of MUTE ...................................30mA

Continuous Current In/Out of SET.......................................30mA

Continuous Current In/Out of INL, INR and GND .............390mA

Continuous Power Dissipation (T

A

= +70°C)

6-Bump UCSP (derate 3.9mW/°C above +70°C) .....308.3mW

6-Pin µDFN (derate 4.5mW/°C above +70°C) ..........357.8mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Bump Temperature (soldering)

Reflow ..........................................................................+235°C

Note 1: All devices are 100% production tested at TA= +25°C. All temperature limits are guaranteed by design.
Note 2: Operating within the recommended supply voltage range ensures that negative audio signals are not limited by the device.

Supply voltages above the recommended supply voltage range may limit the headphone amplifier’s maximum output voltage.

Note 3: Supply current is measured when switches are off.

Supply Voltage Range V

Recommended Supply Voltage
Range

Supply Current I

Input Voltage Range V

Turn-On Time (Figure 1) t

Turn-Off Time (Figure 1) t

Turn-On Time Resistor R

Click-and-Pop Reduction R

Input Leakage Current I

MUTE Leakage Current I
MUTE Input-Voltage High V
MUTE Input-Voltage Low V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Guaranteed by RON test 1.7 5.5 V

(Note 2) 1.7 3.6 V

VDD = 5.5V, TA = +25°C (Note 3) 0.6 1 µA

Guaranteed by input leakage current test

IN

Measured from MUTE = GND and input
voltage settled to 90% of its final value

C

= 500pF 4 10 17

SET

C

= 50pF 1

SET

C

= 50nF 1000

SET

C

= 500pF 350 800 1300 kΩ

SET

V

OFF

DD

DD

DD

ON

SET

VDD = 3.0V 0.3

ON

VDD = 1.7V 2Switch On-Resistance R

VDD = 5.5V 1

= 30Ω, R

SERIES

IN

MUTE

TA = +25°C

VDD = 5.5V, V

IH

IL

V

-

DD

5.5V

V

DD

130 ns

= 16Ω 35 dB

LOAD

VIN = VDD - 5.5V, VDD = 1.7V ±1

V

= VDD, VDD = 5.5V ±1

IN

= 0 or 5.5V, TA = +25°C ±1 µA

MUTE

1.5 V

0.4 V

V

ms

Ω

µA

MAX9892

Shunt Mode Audio Click-and-Pop Eliminator

_______________________________________________________________________________________ 3

Typical Operating Characteristics

(VDD= 3.0V, V

GND

= 0, TA = +25°C, unless otherwise noted.)

0

-10

-20

-30

-40

-50

-60

CLICK AND POP (dBV)

-70

-80
INTO SHUTDOWN

-90

02010 4030 6050 8070 10090

1.0

0.8

0.6

(μA)

DD

I

0.4

0.2

CLICK AND POP vs. R

TESTED WITH THE MAX4338

OUT OF SHUTDOWN

R

SERIES

SERIES

MAX9892 toc01

(Ω)

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX9892 toc04

t

vs. C

OFF

1200

1000

800

(ms)

600

OFF

t

400

200

0

020155 10 253035404550

CLICK AND POP vs. V

0

-20

-40

-60

CLICK AND POP (dBV)

-80

SET

C

(nF)

SET

TESTED WITH THE MAX4338

OUT OF SHUTDOWN

INTO SHUTDOWN

RON vs. SUPPLY VOLTAGE

0.8

0.7

MAX9892 toc02

0.6

0.5

(Ω)

0.4

ON

R

0.3

0.2

0.1

0

1.5 2.5 3.5 4.5 5.5
VDD (V)

DD

MAX9892 toc05

SWITCH TURN-OFF/ON TIME

C

= 500pF

SET

MAX9892 toc06

MAX9892 toc03

MUTE
2V/div

IN_
2V/div

0

1.5 3.52.5 4.5 5.5
VDD (V)

-100

1.5 3.52.5 4.5 5.5
VDD (V)

CROSSTALK vs. FREQUENCY

0

-20

-40

-60

CROSSTALK (dB)

-80

-100

-120

0.01 100
FREQUENCY (kHz)

2ms/div

MAX9892 toc07

1010.1