19-4981; Rev 3; 8/12

TION KIT

EVALUA BLE

AVAILA

Low-Power, Low-Offset, Dual Mode, Class H

DirectDrive Headphone Amplifier

General Description

The MAX97200 is a 45mW Class H headphone amplifier

that runs from a single low 1.8V supply voltage and employs

Maxim’s second-generation DirectDrive



technology.

The MAX97200 features a Dual ModeK internal charge

pump to generate the power rails for the amplifier. The

charge-pump output can be

QPVIN/2

or

QPVIN

depend-

ing on the amplitude of the output signal. When the out-

put voltage is low, the power-supply voltage is

QPVIN/2.

When the output signal demands larger output voltage,

the charge pump switches modes so that a greater

power-supply voltage is realized and more output power

can be delivered to the load.

Second-generation DirectDrive technology improves

power consumption when compared to first-generation

DirectDrive amplifiers. The MAX97200 can be powered

from a regulated 1.8V and have similar power consump-

tion to a traditional DirectDrive amplifier that is powered

from 0.9V.

Maxim’s DirectDrive architecture uses an inverting

charge pump to derive a negative voltage supply. The

headphone amplifier is powered between the positive

supply and the generated negative rail. This scheme

allows the audio output signal to be biased about

ground, eliminating the need for large DC-blocking

capacitors between the amplifier output and the head-

phone load.

Low-output offset voltage provides very good click-and-

pop performance both into and out of shutdown. High

signal-to-noise ratio maintains system fidelity.

The MAX97200 is available in a tiny, 12-bump wafer

level packaging (WLP 1.27mm x 1.65mm) with a small,

0.4mm lead pitch and specified over the -40NC to +85NC

extended temperature range.

Features

S

Second-Generation DirectDrive Technology

S

Dynamic, Class H, Dual Mode Charge Pump

S

Low Voltage Operation, V

PVIN

= 1.8V

S

Low Quiescent Current, 1.15mA (typ) at V

PVIN

=

1.8V

S

Eliminates Large Output DC-Blocking Capacitors

S

Industry-Leading Click-and-Pop Performance

S

High-Fidelity, SNR 105dB (5.6µV Output Noise)

S

Output Power 34mW into 32I (THD+N 1%)

S

Output Power 45mW into 16I (THD+N 10%)

S

Tiny, 12-Bump, 1.27mm x 1.65mm (0.4mm Lead

Pitch) WLP Package

MAX97200

Ordering Information/

Selector Guide

PART

MAX97200AEWC+

MAX97200BEWC+

GAIN

(dB)

3

0

PIN-

PACKAGE

12 WLP

TOP

MARK

ABF

ABG

Note:

All devices operate over the -40°C to +85°C tempera-

ture range.

+Denotes

a lead(Pb)-free and RoHS-compliant package.

Typical Operating Circuit

MAX97200

LEFT AUDIO

INPUT

Applications

Cellular Phones

Smartphones

MP3 Players

VoIP Phones

DirectDrive is a registered trademark of Maxim Integrated

Products, Inc.

Dual Mode is a trademark of Maxim Integrated Products, Inc.

APPLICATIONS

PROCESSOR

LEFT AUDIO OUTPUT

SHDN

RIGHT AUDIO

INPUT

RIGHT AUDIO

OUTPUT

CHARGE

PUMP

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.

1

Low-Power, Low-Offset, Dual Mode, Class H

DirectDrive Headphone Amplifier

MAX97200

ABSOLUTE MAXIMUM RATINGS

PVIN or PVDD to PGND .......................................-0.3V to +2.2V

GND to PGND ......................................................-0.3V to +0.3V

PVSS to PGND .....................................................-2.2V to +0.3V

OUT_ and IN_ to GND ............. (PVSS - 0.2V) to (PVDD + 0.2V)

C1P, C1N ...................................................Cap connection only

SHDN

to GND .........................................................-0.3V to +4V

Output Short-Circuit Current .....................................Continuous

Thermal Limits (Note 1)

Multiple Layer PCB

Continuous Power Dissipation (T

A

= +70NC)

12-Bump WLP (derate 13.7mW/NC above +70NC)....1095mW

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

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

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

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

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-

tion 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.

PACKAGE THERMAL CHARACTERISTICS (Note 1)

Junction-to-Ambient Thermal Resistance (B

JA

) ..............73NC/W

Junction-to-Case Thermal Resistance (B

CA

) ..................30NC/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.

ELECTRICAL CHARACTERISTICS

(V

PVIN

= 1.8V, V

PGND

= V

GND

= 0V, V

SHDN

= 1.8V, C1 = C2 = C3 = 1FF, C4 = 10FF, T

A

= T

MIN

to T

MAX

, unless otherwise noted.

Typical values are at T

A

= +25NC.) (Note 2)

PARAMETER

POWER SUPPLY

Supply Voltage Range

UVLO Rising

UVLO Falling

Quiescent Supply Current

Shutdown Current

Turn-On Time

CHARGE PUMP

Oscillator Frequency

f

OSC1

f

OSC2

f

OSC3

V

OUT

= 0V, T

A

= +25NC

V

OUT

= 0.2V, R

L

=

J,

f

IN

= 1kHz

V

OUT

= 0.5V, R

L

=

J,

f

IN

= 1kHz

V

OUT

= 0.2V, R

L

=

J

V

OUT

= 0.5V, R

L

=

J

Negative Output Voltage

V

PVSS

V

OUT

= 0.2V, R

L

=

J

V

OUT

= 0.5V, R

L

=

J

R

L

=

J,

output voltage at which the

charge pump switches modes, V

OUT

rising, transition from 1/8 to normal

frequency

78

83

665

500

PVIN/2

PVIN

-PVIN/2

-PVIN

QPVIN

x

0.08

V

88

kHz

I

DD

I

SHDN

t

ON

Inputs grounded, T

A

= +25NC, no load

16I load, inputs grounded, T

A

= +25NC

V

SHDN

= 0V, T

A

= +25NC

1.36

PVIN

Guaranteed by PSRR

1.62

1.80

1.48

1.46

1.15

1.16

0.2

0.6

1

1.7

1.98

1.58

V

mA

FA

ms

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Positive Output Voltage

V

PVDD

V

Output Voltage Threshold

V

TH1

V

2

Low-Power, Low-Offset, Dual Mode, Class H

DirectDrive Headphone Amplifier

ELECTRICAL CHARACTERISTICS (continued)

(V

PVIN

= 1.8V, V

PGND

= V

GND

= 0V, V

SHDN

= 1.8V, C1 = C2 = C3 = 1FF, C4 = 10FF, T

A

= T

MIN

to T

MAX

, unless otherwise noted.

Typical values are at T

A

= +25NC) (Note 2)

PARAMETER

Output Voltage Threshold

SYMBOL

V

TH2

CONDITIONS

R

L

=

J,

output voltage at which the

charge pump switches modes, V

OUT

rising, transition from high-efficiency

mode to high-power mode

Time it takes for the charge pump to

transition from high-power mode to

high-efficiency mode; R

L

=

J

Time it takes for the charge pump to

transition from high-efficiency mode to high-

power mode (90% of its value); R

L

=

J

MAX97200A

MAX97200B

R

L

= 10kI, THD+N = 1%

R

L

= 10kI, THD+N = 10%

2.75

-0.17

MIN

TYP

QPVIN

x

0.24

MAX

UNITS

V

MAX97200

t

HOLD

Charge-Pump Mode Transition

Timeouts (Figure 2)

t

RISE

AMPLIFIER

Voltage Gain

Maximum Output Voltage

Channel-to-Channel Gain

Matching

Total Output Offset Voltage

Input Resistance

V

OS

R

IN

A

V

32

ms

20

Fs

2.92

0

1.295

1.44

Q0.1

3.09

+0.17

dB

V

PK

dB

T

A

= +25NC

MAX97200A

MAX97200B

V

PVDD

= 1.62V to 1.98V, T

A

= +25NC

f

IN

= 217Hz

100mV

P-P

ripple

f

IN

= 1kHz

f

IN

= 20kHz

R

L

= 10kI

6

7.2

62

Q0.1

10

12

83

96

94

61

0.16

34

45

1

0.02

0.003

0.008

5.6

4.7

105

Into shutdown

Out of shutdown

80

Q0.3

14

16.8

mV

kI

Power-Supply Rejection Ratio

PSRR

dB

Output Power

Line Output Voltage

Total Harmonic Distortion Plus

Noise

Output Noise

Signal-to-Noise Ratio

P

OUT

V

LINE

THD+N

THD+N = 1%

R

L

= 10kI

R

L

= 32I

R

L

= 16I

mW

V

RMS

%

R

L

= 16I, P

OUT

= 0.1mW, f

IN

= 1kHz (Note 3)

R

L

= 16I, P

OUT

= 10mW, f

IN

= 1kHz (Note 4)

R

L

= 10kI, V

OUT

= 1V, f

IN

= 1kHz (Note 4)

V

N

SNR

Inputs grounded, A-weighted, MAX97200A

Inputs grounded, A-weighted, MAX97200B

A-weighted, MAX97200B

R

L

= 32I, peak

voltage, A-weighted,

32 samples/second,

MAX97200B

FV

dB

Click-and-Pop Level

V

CP

dBV

68

100

200

dB

pF

Crosstalk

Maximum Capacitive Load

X

TALK

R

L

= 16I, 1kHz, P

OUT

= 5mW

3

Low-Power, Low-Offset, Dual Mode, Class H

DirectDrive Headphone Amplifier

MAX97200

ELECTRICAL CHARACTERISTICS (continued)

(V

PVIN

= 1.8V, V

PGND

= V

GND

= 0V, V

SHDN

= 1.8V, C1 = C2 = C3 = 1FF, C4 = 10FF, T

A

= T

MIN

to T

MAX

, unless otherwise noted.

Typical values are at T

A

= +25NC) (Note 2)

PARAMETER

DIGITAL INPUT (SHDN)

Input High Voltage

Input Low Voltage

Input Leakage Current

SYMBOL

V

IH

V

IL

I

IH

I

IL

V

SHDN

= 4V, T

A

= +25NC

V

SHDN

= 1.8V, T

A

= +25NC

V

SHDN

= 0V, T

A

= +25NC

-1

CONDITIONS

MIN

1.4

0.4

+1

FA

TYP

MAX

UNITS

V

Note 2:

All specifications are 100% tested at T

A

= +25NC. Temperature limits are guaranteed by design.

Note 3:

V

PVDD

= 0.9V, V

PVSS

= -0.9V.

Note 4:

V

PVDD

= 1.8V, V

PVSS

= -1.8V.

Typical Operating Characteristics

(V

PVIN

= 1.8V, V

PGND

= V

GND

= 0V, V

SHDN

= 1.8V, C1 = C2 = C3 = 1FF, C4 = 10FF, both channels driven in phase, T

A

= +25NC,

unless otherwise noted.)

THD+N vs. OUTPUT POWER

MAX97200 toc01

THD+N vs. OUTPUT POWER

MAX97200 toc02

THD+N vs. OUTPUT VOLTAGE

R

L

= 10kI

MAX97200 toc03

100

10

THD+N (%)

1

0.1

R

L

= 16I

100

10

THD+N (%)

1

0.1

0.01

R

L

= 32I

100

10

THD+N (%)

1

0.1

f

IN

= 100Hz

0.01

0.001

0

10

20

30

40

f

IN

= 1kHz

f

IN

= 6kHz

50

60

70

80

P

OUT

(mW)

f

IN

= 100Hz

f

IN

= 1kHz

f

IN

= 1kHz

0.01

f

IN

= 6kHz

0.001

f

IN

= 100Hz

0.001

0

10

20

30

P

OUT

(mW)

40

50

60

f

IN

= 6kHz

0

0.5

1.0

1.5

2.0

2.5

V

OUT

(V

RMS

)

THD+N vs. FREQUENCY

MAX97200 toc04

THD+N vs. FREQUENCY

MAX97200 toc05

THD+N vs. FREQUENCY

R

L

= 10kI

MAX97200 toc06

10

R

L

= 16I

10

R

L

= 32I

10

1

THD+N (%)

1

THD+N (%)

1

THD+N (%)

0.1

P

OUT

= 20mW

P

OUT

= 25mW

0.1

P

OUT

= 20mW

0.01

P

OUT

= 2mW

0.01

0.1

P

OUT

= 25mW

0.1

V

OUT

= 0.868V

RMS

0.01

V

OUT

= 0.316V

RMS

0.01

0.1

1

FREQUENCY (kHz)

10

100

V

OUT

= 1.12V

RMS

0.01

P

OUT

= 2mW

0.001

0.01

0.1

1

FREQUENCY (kHz)

10

100

0.001

1

FREQUENCY (kHz)

10

100

4

Low-Power, Low-Offset, Dual Mode, Class H

DirectDrive Headphone Amplifier

Typical Operating Characteristics (continued)

(V

PVIN

= 1.8V, V

PGND

= V

GND

= 0V, V

SHDN

= 1.8V, C1 = C2 = C3 = 1FF, C4 = 10FF, both channels driven in phase, T

A

= +25NC,

unless otherwise noted.)

OUTPUT POWER

vs. LOAD RESISTANCE

MAX97200 toc07

MAX97200

OUTPUT POWER vs. LOAD RESISTANCE

AND CHARGE-PUMP CAPACITOR

MAX97200 toc08

POWER CONSUMPTION

vs. OUTPUT POWER

140

POWER CONSUMPTON (mW)

120

100

80

60

40

20

0

MAX97200 toc09

80

70

OUTPUT POWER (mW)

60

50

40

30

20

10

0

1

10

100

1000

80

70

OUTPUT POWER (mW)

60

50

40

30

20

10

160

10% THD + N

C

1

= C

2

= C

3

= 1µF

C

1

= C

2

= C

3

= .47µF

C

1

= C

2

= C

3

= 2.2µF

1% THD + N

10,000

0

10

100

1000

10,000

LOAD RESISTANCE (I)

1

10

OUTPUT POWER (mW)

100

LOAD RESISTANCE (I)

POWER DISSIPATION

vs. OUTPUT POWER

MAX97200 toc10

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX97200 toc11

SHUTDOWN SUPPLY CURRENT

vs. SUPPLY VOLTAGE

0.18

0.16

SUPPLY CURRENT (µA)

0.14

0.12

0.1

0.08

0.06

0.04

0.02

0

RL =

J

MAX97200 toc12

100

90

POWER DISSIPATION (mW)

80

70

60

50

40

30

20

10

0

1

10

OUTPUT POWER (mW)

R

L

= 32I

R

L

= 16I

1.20

1.15

SUPPLY CURRENT (mA)

1.10

1.05

1.00

0.95

0.90

0.85

0.80

RL =

J

0.20

100

1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00

SUPPLY VOLTAGE (V)

1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00

SUPPLY VOLTAGE (V)

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

MAX97200 toc13

CROSSTALK vs. FREQUENCY

5mW 16I

MAX97200 toc14

IN-BAND OUTPUT SPECTRUM

f = 1kHz

-20

OUTPUT MAGNITUDE (dBV)

-40

-60

-80

-100

-120

-140

-160

MAX97200 toc15

0

-20

-40

PSRR (dB)

-60

-80

-100

-120

V

RIPPLE

= 200mV

P-P

0

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

-110

-120

CROSSTALK (dB)

0

OUTPUT POWER = 5mW

R

L

= 16I

0.01

0.1

1

FREQUENCY (kHz)

10

100

10

100

1k

FREQUENCY (Hz)

10k

100k

0.01

0.1

1

FREQUENCY (Hz)

10

100

5

参数名称	属性值
Product Attribute	Attribute Value
制造商 Manufacturer	Maxim(美信半导体)
产品种类 Product Category	Audio Amplifiers
RoHS	Details
产品 Product	Headphone Amplifiers
类 Class	Class-H
Output Power	1095 mW
安装风格 Mounting Style	SMD/SMT
封装 / 箱体 Package / Case	WLP-12
THD plus Noise	0.02 %
最大工作温度 Maximum Operating Temperature	+ 85 C
最小工作温度 Minimum Operating Temperature	- 40 C
系列 Packaging	Cut Tape
系列 Packaging	MouseReel
系列 Packaging	Reel
工作电源电流 Operating Supply Current	1.15 mA
工作电源电压 Operating Supply Voltage	1.8 V
Pd-功率耗散 Pd - Power Dissipation	1095 mW
工厂包装数量 Factory Pack Quantity	2500

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