MAXIM MAX98309, MAX98310 Technical data

E V A L UA T I ON K IT A V AI L A BL E

19-5912; Rev 0; 6/11

MAX98309/MAX98310

Mono 1.4W Class AB Audio Amplifiers

General Description

The MAX98309/MAX98310 mono 1.4W class AB audio amplifiers offer low quiescent current while maintaining excellent SNR and low 0.008% THD+N. These ICs feature excellent 90dB PSRR and state of the art click-andpop suppression.

The ICs are offered with an internally fixed 0dB, 3dB, 6dB, and 9dB gain (MAX98310) or an externally set gain (MAX98309) through external resistors.

The MAX98309 feature a 10ms or 100ms pin-selectable turn-on time, while the MAX98310 has a preset 5ms turnon time.

The MAX98309/MAX98310 are available in a (1.0mm x

1.0mm) 9-bump, 0.3mm pitch WLP, and are specified over the extended -40NC to +85NC temperature range.

Applications

Cell Phones/Smartphones Digital Cameras GPS Portable Media Players e-Readers Tablets

Benefits and Features

S Enhances System Performance

 Differential Input Improves Noise Immunity  Industry-Leading Click-and-Pop Suppression  High 90dB PSRR (fIN = 217Hz)

S Smaller Solution Size

 1mm x 1mm WLP Footprint

S Extends Battery Life

 Low Quiescent Current

S Delivers Robust System Design

 Thermal Overload Protection  Short-Circuit Protection

S 1.2mA Supply Current (VDD = 3.7V) S 750mW into 8I (VDD = 3.7V) S 2.5V to 5.5V Supply Operation S Pin-Selectable, Internally-Fixed Gain (MAX98310) S 1.8V Logic-Compatible SHDN Input

Ordering Information appears at end of data sheet.

For related parts and recommended products to use with this part, refer to www.maxim-ic.com/MAX98309.related.

Simplified Block Diagram

BIAS V

BIAS

2.5V TO 5.5V

DD

R

V

DD

R

F

GND

F

GAIN

MAX98310

OUT+

OUT-

R

F

2.5V TO 5.5V

0.1µF 1µF

GND

R

V

DD

MAX98309

OUT+

OUT-

F

BIAS TON

BIAS

C

IN

R

IN

C

IN

R

IN

IN-

BIAS

IN+

SHDN

0.1µF 1µF

C

IN

C

IN

IN-

IN+

R

IN

R

IN

SHDN GND

�� 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.

MAX98309/MAX98310

Mono 1.4W Class AB Audio Amplifiers

ABSOLUTE MAXIMUM RATINGS

VDD to GND ............................................................... -0.3V to 6V

SHDN to GND ........................................................... -0.3V to 6V

All Other Pins to GND ...............................-0.3V to (V

Continuous Current

VDD, GND, OUT_ ....................................................... Q750mA

IN_, SHDN, BIAS, GAIN, TON ......................................... Q20mA

OUT_ Short Circuit to GND or VDD Duration ............Continuous

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.

DD

+ 0.3V)

PACKAGE THERMAL CHARACTERISTICS (Note 1)

WLP

Junction-to-Ambient Thermal Resistance (BJA)......... 94°C/W

Junction-to-Case Thermal Resistance (BJC) ...............41°C/W

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-

layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.

OUT+ to OUT- Short Circuit Duration .......................Continuous

Continuous Power Dissipation (TA = +70NC)

WLP (derate 11.9mW/NC above +70NC)......................848mW

Junction Temperature .....................................................+150NC

Operating Temperature Range .......................... -40NC to +85NC

Storage Temperature Range ............................ -65NC to +150NC

Soldering Temperature (reflow).......................................+260NC

ELECTRICAL CHARACTERISTICS

(VDD = 3.7V, V TA = T

MIN to TMAX.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage Range V Undervoltage Lockout UVLO VDD falling 1.8 2.3 V

Quiescent Supply Current I

Shutdown Supply Current I

Turn-On Time t

Gain A

Gain Selection Threshold MAX98310

= 0V, SHDN = VDD, GAIN = VDD (0dB), C

GND

Typical values are at TA = +25°C, unless otherwise noted.) (Note 2)

DD

VDD

VDD_SD

ON

Guaranteed by PSRR test 2.5 5.5 V

SHDN = V

V

SHDN

MAX98309 shutdown to full operation

MAX98310 shutdown to full operation 5.7 11.5

MAX98310

V

DD

= 0V, TA = +25NC

= 0.1µF, C

BIAS

V

= 3.7V 1.2

DD

V

= 5V 1.9 1.8

DD

TON = GND 10 22.8

TON = V

GAIN = V

GAIN = GND 2.75 3 3.25

GAIN = unconnected 5.75 6 6.25

GAIN = BIAS 8.75 9 9.25

GAIN = V

GAIN = GND

GAIN = unconnected

GAIN = BIAS

= 0.47µF, no load: RIN = RF = 10kI (MAX98309),

IN

2 3

DD

-0.25 0 +0.25

0.80 x V

DD

0.16 x V

DD

0.35 x V

DD

100

0.05 x V

DD

0.24 x V

DD

0.69 x V

DD

mA

FA

ms

dB

V

�� Maxim Integrated Products 2

Mono 1.4W Class AB Audio Amplifiers

ELECTRICAL CHARACTERISTICS (continued)

(VDD = 3.7V, V = T

MIN to TMAX.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Differential Input Resistance R

Input Bias Current I

Shutdown Input Bias Current

Output Offset Voltage

= 0V, SHDN = VDD, GAIN = VDD (0dB), C

GND

Typical values are at TA = +25°C, unless otherwise noted.) (Note 2)

MAX98309, SHDN = VDD

INDIFF

INBIAS

I

INBIAS_

SHDN

V

OS

MAX98310

MAX98309/MAX98310, SHDN = V

SHDN = GND, IN_ = VDD or IN_ = GND

TA = +25NC (Note 3) Q0.2 Q1

= 0.1µF, C

BIAS

MAX98309/MAX98310

= 0.47µF, no load: RIN = RF = 10kI (MAX98309), TA

IN

1000

GAIN = 0dB 38.2 GAIN = 3dB 31.7 GAIN = 6dB 25.5

DD

-5 +5

Q1 FA

kI

FA

mV

RL = 8I, 32 samples per

Click-and-Pop Level K

Common-Mode Bias Voltage V

Input Common-Mode Voltage Range

Common-Mode Rejection Ratio CMRR MAX98310/MAX98310

Power-Supply Rejection Ratio PSRR

Output Power P

BIAS

V

OUT

CP

CM

second, A-weighted, TA = +25NC (Notes 3, 4)

Voltage at BIAS

Inferred from CMRR test 0.5

DC 2.5V to 5.5V 73 93

V

= 200mV

RIPPLE

(Note 3)

VDD = 3.7V, 1% THD+N

V

= 3.7V, 10% THD+N

DD

V

= 5V, 1% THD+N

DD

(Note 5)

VDD = 5V, 10% THD+N (Note 5)

P-P

Into shutdown -66

Out of shutdown -66

0.475 x V

Guaranteed over input commonmode voltage range

fIN = 1kHz, RL = 8I + 33FH

fIN = 217Hz 90 fIN = 1kHz 90 fIN = 10kHz 72 RL = 8I + 68FH RL = 4I + 33FH RL = 8I + 68FH RL = 4I + 33FH RL = 8I + 68FH

RL = 4I + 33FH, thermally limited

RL = 8I + 68FH

RL = 4I + 33FH, thermally limited

-50 -76

DD

0.5 x V

-62

0.750

1.2

0.9

1.5

1.4

2.1

1.7

2.7

DD

0.525

x V

DD

VDD -

0.6

dBV

V

dB

W

�� Maxim Integrated Products 3

MAX98309/MAX98310

Mono 1.4W Class AB Audio Amplifiers

ELECTRICAL CHARACTERISTICS (continued)

(VDD = 3.7V, V TA = T

MIN to TMAX.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Total Harmonic Distortion Plus Noise

Signal-to-Noise Ratio SNR

Output Noise Voltage V

Overcurrent Protection Threshold

Thermal-Protection Threshold +160

= 0V, SH DN = VDD, GAIN = VDD (0dB), C

GND

Typical values are at TA = +25°C, unless otherwise noted.) (Note 2)

fIN = 1kHz, BW = 22Hz to

THD+N

22kHz

fIN = 6kHz, BW = 22Hz to 22kHz

A-weighted, VDD = 5V, P RL = 8I + 33FH

A-weighted (Note 3) 9

N

= 0.1µF, C

BIAS

RL = 8I + 68FH, P

RL = 4I + 33FH, P

RL = 8I + 68FH, P

= 1.4W,

OUT

= 0.47µF, no load: RIN = RF = 10kI (MAX98309),

IN

= 375mW

OUT

= 750mW

OUT

= 375mW

OUT

0.06 0.02

0.008

0.01

110 dB

%

FV

2 A

NC

Thermal-Protection Hysteresis 15

Maximum Capacitive Load Drive

LOGIC INPUT (SHDN, TON) (MAX98309)

Input Logic-High V Input Logic-Low V Input Leakage Current High I Input Leakage Current Low I

Note 2: All specifications are 100% tested at TA = +25°C; temperature limits are guaranteed by design. Note 3: Inputs AC-coupled to GND. Note 4: Mode transitions controlled by SHDN. Note 5: Thermally limited by package.

C

IH

Bridge-tied load capacitance 500 pF

L

1.8V logic compliant 1.4 V

IH

1.8V logic compliant 0.4 V

IL

TA = +25NC TA = +25NC

IL

NC

1 1

FA FA

�� Maxim Integrated Products 4

MAX98309/MAX98310

Mono 1.4W Class AB Audio Amplifiers

Typical Operating Characteristics

(VDD = 3.7V, V

= 0V, SHDN = VDD, GAIN = GND (RF = RIN = 10kI), C

GND

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. FREQUENCY

10

VDD = 4.2V R

= 4I

L

1

P

= 300mW

0.1

THD+N (%)

0.01

0.001

OUT

P

= 50mW

OUT

10 100k

FREQUENCY (kHz)

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. FREQUENCY

100

VDD = 3.7V

= 8I

R

L

10

1

THD+N (%)

0.1

0.01

0.001 10 100k

P

= 50mW

OUT

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION PLUS

100

10

MAX98309 toc01

10k1k100

MAX98309 toc04

P

= 500mW

OUT

10k1k100

NOISE vs. OUTPUT POWER

VDD = 3.7V R

= 4I

L

BIAS

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. FREQUENCY

100

VDD = 5V RL = 8I

10

1

P

THD+N (%)

0.1

0.01

0.001

P

= 200mW

OUT

10 100k

FREQUENCY (Hz)

OUT

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. OUTPUT POWER

100

VDD = 4.2V R

= 4I

L

10

1

THD+N (%)

0.001

fIN = 300Hz

0.1

0.01

0 2000

OUTPUT POWER (mW)

MAX98309 toc07

fIN = 6kHz

fIN = 1kHz

= 0.1µF, CIN = 1µF, no load, unless otherwise noted.)

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. FREQUENCY

100

VDD = 3.7V

MAX98309 toc02

= 1.2W

10k1k100

RL = 4I

10

1

P

= 800mW

THD+N (%)

0.1

0.01

0.001 10 100k

OUT

P

= 50mW

OUT

FREQUENCY (Hz)

10k1k100

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. OUTPUT POWER

100

VDD = 5V R

= 8I

MAX98309 toc05

THD+N (%)

0.001

15001000500

L

10

1

0.1

0.01

fIN = 300Hz

0 1750

OUTPUT POWER (mW)

fIN = 6kHz

fIN = 1kHz

150012501000750500250

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. OUTPUT POWER

100

VDD = 3.7V RL = 8I

10

MAX98309 toc08

MAX98309 toc03

MAX98309 toc06

1

fIN = 300Hz

THD+N (%)

0.1

0.01

0.001 0 1600

fIN = 6kHz

fIN = 1kHz

OUTPUT POWER (mW)

1200800400

1

THD+N (%)

0.1

0.01

0.001

fIN = 300Hz

0 1000

fIN = 6kHz

fIN = 1kHz

OUTPUT POWER (mW)

800600400200

�� Maxim Integrated Products 5