MAXIM MAX9718, MAX9719 Technical data

General Description

The MAX9718/MAX9719 differential input audio power
amplifiers are ideal for portable audio devices with
internal speakers. The differential input structure
improves noise rejection and provides common-mode
rejection. A bridge-tied load (BTL) architecture mini­mizes external component count, while providing high­quality, power audio amplification. The MAX9718 is a
single-channel amplifier while the MAX9719 is a dual­channel amplifier for stereo systems. Both devices
deliver 1.4W continuous average power per channel to
a 4Ω load with less than 1% THD+N while operating
from a single +5V supply. The devices are available as
adjustable gain amplifiers or with internally fixed gains
of 0dB, 3dB, and 6dB to reduce component count.

A shutdown input disables the bias generator and
amplifiers and reduces quiescent current consumption
to less than 100nA. The MAX9718 shutdown input can
be set as active high or active low. These devices fea­ture Maxim’s comprehensive click-and-pop suppres­sion circuitry that reduces audible clicks and pops
during startup and shutdown.

The MAX9718 is pin compatible with the LM4895,
and is available in 9-bump UCSP™, 10-pin TDFN, and
10-pin µMAX®packages. The MAX9719 is available in
16-pin TQFN, 16-pin TSSOP, and 16-bump UCSP pack­ages. Both devices operate over the -40°C to +85°C
extended temperature range.

Applications

Mobile Phones

PDAs

Portable Devices

Features

♦ 2.7V to 5.5V Single-Supply Operation

♦ Very High -93dB PSRR at 217Hz
♦ 1.4W into 4Ω at 1% THD+N (per Channel)

♦ Differential Input

♦ Internal Fixed Gain to Reduce Component Count

♦ Adjustable Gain Option (MAX9718A/H/MAX9719A)

♦ 100nA Low-Power Shutdown Mode

♦ No Audible Clicks or Pops at Power-Up/Down

♦ Improved Performance Pin-Compatible Upgrade

to LM4895 (MAX9718D/G)

♦ 1.8V Logic Compatible

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

MAX9719

SINGLE SUPPLY

2.7V TO 5.5V

SHDN

INL+

INL-

INR+

INR-

MAX9718

SINGLE SUPPLY

2.7V TO 5.5V

SHDM

SHDN

IN+

OUT+

OUT-

OUTR-

OUTR+

OUTL-

OUTL+

IN-

Simplified Block Diagrams

19-3050; Rev 6; 3/09

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.

Ordering Information continued at end of data sheet.

Pin Configurations appear at end of data sheet.

EVALUATION KIT

AVAILABLE

UCSP is a trademark of Maxim Integrated Products, Inc.
µMAX is a registered trademark of Maxim Integrated Products, Inc.

PART

TEMP RANGE

PIN­PACKAGE

T O P

M A R K

M A X9 7 1 8 AE BL+ TG 45

+ADX

MAX9718AETB+T

+AAV

+Denotes lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.

G45 indicates protective die coating.

-40°C to +85°C 3 x 3 UCSP

-40°C to +85°C 10 TDFN-EP*

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—5V Supply

(VCC= 5V, GND = 0, SHDN/SHDN = VCC(MAX9718/MAX9719), SHDM = GND (MAX9718), RIN= RF= 10kΩ (MAX971_A/H),

T

A

= +25°C. C

BIAS

= 0.1µF, no load. Typical values are at TA= +25°C, unless otherwise noted.) (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.

Supply Voltage (VCCto GND) ..................................-0.3V to +6V

Any Other Pin to GND ...............................-0.3V to (V

CC

+ 0.3V)

IN_, BIAS, SHDM, SHDN, SHDN Continuous Current ........20mA

OUT_ Short-Circuit Duration to GND or V

CC

.............Continuous

Continuous Power Dissipation (T

A

= +70°C)

9-Bump UCSP (derate 5.2mW/°C above +70°C)..........412mW

10-Pin TDFN (derate 24.4mW/°C above +70°C) ........1951mW

10-Pin µMAX (derate 10.3mW/°C above +70°C) ..........825mW

16-Bump UCSP (derate 8.2mW/°C above +70°C) .......659mW

16-Pin TQFN (derate 16.9mW/°C above +70°C) ........1349mW

16-Pin TSSOP (derate 21.3mW/°C above +70°C) ......1702mW

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

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

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

Bump Temperature (soldering) Reflow............................+235°C

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

PARAMETER

SYMBOL

CONDITIONS MIN

TYP

MAX

UNITS

Supply Voltage V

CC

2.7 5.5 V

Supply Current I

CC

V

IN-

= V

IN+

= V

BIAS

, TA = -40°C to +85°C,

per amplifier (Note 2)

7.5 mA

Shutdown Supply Current

1µA

V

IH

SHDN, SHDN, SHDM
Threshold

V

IL

MAX9718A/B/C/D

V

V

IH

1.4

SHDN, SHDN, SHDM
Threshold

V

IL

MAX9718E/F/G/H

0.4

V

AV = 0dB, MAX971_A/H,
MAX971_B/E

±10

±15

Output Offset Voltage V

OS

±20

mV

0.5

0.5

Inferred from
CMRR test

0.5

Common-Mode Input Voltage V

IC

External gain, MAX971_A/H 0.5

V

Input Impedance R

IN

MAX971_B/E, MAX971_C/F, MAX971_D/G 10 15 20 kΩ

-50

fN = 1kHz

dB

f = 217Hz

PSRR

V

IN-

= V

IN+

= V

BIAS

,

V

RIPPLE

= 200m V

P-P

,

f = 1kHz

dB

R

L

= 8Ω 0.8

Output Power P

OUT

THD+N = 1%,
f

IN

= 1kHz (Note 4)

R

L

= 4Ω

W

Total Harmonic Distortion Plus
Noise

R

L

= 8Ω, f

IN

= 1kHz, P

OUT

= 0.75W,

V

CC

= 5V, AV = 6dB (Note 5)

%

5.0

Common-Mode Rejection Ratio CMRR

Power-Supply Rejection Ratio

I

SHDN

SHDN = SHDM = SHDN = GND, per amplifier 0.1

0.7 x V

CC

0.3 x V

THD+N

V

= V

IN-

IN+

R

= 8Ω , C

L

BIAS

= V

BIAS

AV = 3dB, MAX971_C/F ±1

AV = 6dB, MAX971_D/G ±1

AV = 0dB, MAX971_B/E

AV = 3dB, MAX971_C/F

AV = 6dB, MAX971_D/G

= 1µF

±1

V CC - 0.5

V CC - 0.6

V CC - 0.8

VCC - 1.2

-60

-60

-93

-90

1.1

1.4

0.002

CC

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—5V Supply (continued)

(VCC= 5V, GND = 0, SHDN/SHDN = VCC(MAX9718/MAX9719), SHDM = GND (MAX9718), RIN= RF= 10kΩ (MAX971_A/H),
T

A

= +25°C. C

BIAS

= 0.1µF, no load. Typical values are at TA= +25°C, unless otherwise noted.) (Note 1)

ELECTRICAL CHARACTERISTICS—3V Supply

(VCC= 3V, GND = 0, SHDN/SHDN = VCC(MAX9718/MAX9719), SHDM = GND (MAX9718), RIN= RF= 10kΩ (MAX971_A/H),
T

A

= +25°C. C

BIAS

= 0.1µF, no load. Typical values are at TA= +25°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS MIN

TYP

MAX

UNITS

Gain Accuracy MAX971_B/E, MAX971_C/F, MAX971_D/G ±1 %

Channel-to-Channel Gain
Matching

MAX9719B/E, MAX9719C/F, MAX9719D/G ±1 %

Signal-to-Noise Ratio SNR P

OUT

= 1W, R

L

= 8Ω

dB

Thermal-Shutdown Threshold

°C

Thermal-Shutdown Hysteresis

15 °C

Maximum Capacitive Drive

Bridge-tied capacitance

pF

Power-Up/Enable from
Shutdown Time

t

PU

10 ms

Shutdown Time

µs

Turn-Off Transient V

POP

(Note 6) 50 mV

Crosstalk MAX9719, fIN = 1kHz

dB

-104

+160

C

LOAD

t

SHDN

500

3.5

-85

Supply Current I

Shutdown Supply Current I

SHDN, SHDN, SHDM
Threshold

Common-Mode Bias Voltage V

Output Offset Voltage V

Common-Mode Input Voltage V

Input Impedance R

Common-Mode Rejection Ratio CMRR

Power-Supply Rejection Ratio PSRR

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

V

= V

CC

SHDN

V

IH

V

IL

BIAS

OS

IN+

= V

IN-

per amplifier (Note 2)
SHDN = SHDM = SHDN = GND, per amplifier 0.1 1 µA

(Note 3)

V

= V

IN+

= V

IN-

, TA = -40°C to +85°C,

BIAS

0.7 x V

CC

V

/2

CC

- 5%

AV = 0dB, MAX971_A/H
MAX971_B/E

BIAS

AV = 3dB, MAX971_C/F ±1 ±15

3.8 6.0 mA

V

/2

CC

±1 ±10

AV = 6dB, MAX971_D/G ±1 ±20

AV = 0dB, MAX971_B/E 0.5 V CC - 0.7

IC

Inferred from
CMRR test

AV = 3dB, MAX971_C/F 0.5 V CC - 0.8

A

= 6dB, MAX971_D/G 0.5 V CC - 1.0

V

External gain, MAX971_A/H 0.5 V CC - 1.2
MAX971_B/E, MAX971_C/F, MAX971_D/G 10 15 20 kΩ

IN

-50 -60

= 1kHz -70

f

N

V

IN-

V

RIPPLE

R

L

C

BIAS

= V

= 8Ω ,

= 1µF

= V

IN+

BIAS

= 200m V

,

f = 217Hz -93

,

P-P

f = 1kHz -90

0.3 x V

V

CC

+ 5%

/2

CC

V

V

mV

V

dB

dB

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

MAX9718 toc01

FREQUENCY (Hz)

THD+N (%)

100 1k 10k

0.001

0.01

0.1

1

10

0.0001
10 100k

VCC = 5V
R

L

= 4

Ω

A

V

= 2

OUTPUT POWER = 1W

OUTPUT POWER = 50mW

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

MAX9718 toc02

FREQUENCY (Hz)

THD+N (%)

100 1k 10k

0.001

0.01

0.1

1

10

0.0001
10 100k

VCC = 5V
R

L

= 4

Ω

A

V

= 4

OUTPUT POWER = 1W

OUTPUT POWER = 200mW

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

MAX9718 toc03

FREQUENCY (Hz)

THD+N (%)

100 1k 10k

0.001

0.01

0.1

1

10

0.0001
10 100k

VCC = 5V
R

L

= 8

Ω

A

V

= 2

OUTPUT POWER = 250mW

OUTPUT POWER = 750mW

Typical Operating Characteristics

(VCC= 5V, C

BIAS

= 0.1µF, THD+N measurement bandwidth = 22Hz to 22kHz, TA= +25°C, unless otherwise noted.)

Note 1: All specifications are 100% tested at T

A

= +25°C. Specifications over temperature (TA= T

MIN

to T

MAX

) are guaranteed by

design, not production tested.

Note 2: Quiescent power-supply current is specified and tested with no load. Quiescent power-supply current depends on the offset

voltage when a practical load is connected to the amplifier. Guaranteed by design.

Note 3: Common-mode bias voltage is the voltage on BIAS and is nominally V

CC

/2.

Note 4: Output power is specified by a combination of a functional output current test and characterization analysis.
Note 5: Measurement bandwidth for THD+N is 22Hz to 22kHz.
Note 6: Peak voltage measured at power-on, power-off, into or out of SHDN. Bandwidth defined by A-weighted filters, inputs at AC

GND. V

CC

rise and fall times greater than or equal to 1ms.

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—3V Supply (continued)

(VCC= 3V, GND = 0, SHDN/SHDN = VCC(MAX9718/MAX9719), SHDM = GND (MAX9718), RIN= RF= 10kΩ (MAX971_A/H),
T

A

= +25°C. C

BIAS

= 0.1µF, no load. Typical values are at TA= +25°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS MIN

TYP

MAX

UNITS

Output Power P

OUT

R

L

= 8Ω, THD+N = 1%, f

IN

= 1kHz (Note 4)

mW

Total Harmonic Distortion Plus
Noise

R

L

= 8Ω, f

IN

= 1kHz, P

OUT

= 0.25W,

A

V

= 6dB

%

Thermal-Shutdown Threshold

°C

15 °C

Maximum Capacitive Drive

Bridge-tied capacitance

pF

Power-Up/Enable from
Shutdown Time

t

PU

10 ms

Shutdown Time

3µs

Turn-Off Transient V

POP

(Note 6) 40 mV

Crosstalk MAX9719, fN = 1kHz

dB

475

THD+N

0.003

+160

Thermal-Shutdown Hysteresis

C

LOAD

t

SHDN

500

-85

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

_______________________________________________________________________________________ 5

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

MAX9718 toc04

FREQUENCY (Hz)

THD+N (%)

100 1k 10k

0.001

0.01

0.1

1

10

0.0001
10 100k

VCC = 5V
R

L

= 8

Ω

A

V

= 4

OUTPUT POWER = 200mW

OUTPUT POWER = 800mW

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

MAX9718 toc05

FREQUENCY (Hz)

THD+N (%)

100 1k 10k

0.001

0.01

0.1

1

10

0.0001
10 100k

VCC = 3V
R

L

= 4

Ω

A

V

= 2

OUTPUT POWER = 250mW

OUTPUT POWER = 50mW

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

MAX9718 toc06

FREQUENCY (Hz)

THD+N (%)

100 1k 10k

0.001

0.01

0.1

1

10

0.0001
10 100k

VCC = 3V
R

L

= 4

Ω

A

V

= 4

OUTPUT POWER = 70mW

OUTPUT POWER = 175mW

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

MAX9718 toc07

FREQUENCY (Hz)

THD+N (%)

100 1k 10k

0.001

0.01

0.1

1

10

0.0001

10 100k

VCC = 3V
R

L

= 8

Ω

A

V

= 2

OUTPUT POWER = 250mW

OUTPUT POWER = 100mW

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

MAX9718 toc08

FREQUENCY (Hz)

THD+N (%)

100 1k 10k

0.001

0.01

0.1

1

10

0.0001
10 100k

VCC = 3V
R

L

= 8

Ω

A

V

= 4

OUTPUT POWER = 200mW

OUTPUT POWER = 50mW

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

MAX9718 toc09

OUTPUT POWER (W)

THD+N (%)

0.2 0.4 0.6 0.8 1.2 1.41.0 1.8

0.01

0.1

1

10

100

0.001

02.0

fIN = 1kHz

fIN = 100Hz

fIN = 10kHz

1.6

VCC = 5V
R

L

= 4

Ω

A

V

= 2

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

MAX9718 toc10

OUTPUT POWER (W)

THD+N (%)

0.5 1.51.0

0.01

0.1

1

10

100

0.001

02.0

fIN = 1kHz

fIN = 100Hz

fIN = 10kHz

VCC = 5V
R

L

= 4

Ω

A

V

= 4

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

MAX9718 toc11

OUTPUT POWER (W)

THD+N (%)

0.2 0.6 0.8 1.0 1.20.4

0.01

0.1

1

10

100

0.001
0 1.4

fIN = 1kHz

fIN = 100Hz

fIN = 10kHz

VCC = 5V
R

L

= 8

Ω

A

V

= 2

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

MAX9718 toc12

OUTPUT POWER (W)

THD+N (%)

0.2 0.6 0.8 1.0 1.20.4

0.01

0.1

1

10

100

0.001
0 1.4

fIN = 100Hz

fIN = 1kHz

fIN = 10kHz

VCC = 5V
R

L

= 8

Ω

A

V

= 4

Typical Operating Characteristics (continued)

(VCC= 5V, C

BIAS

= 0.1µF, THD+N measurement bandwidth = 22Hz to 22kHz, TA= +25°C, unless otherwise noted.)

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

6 _______________________________________________________________________________________

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

MAX9718 toc13

OUTPUT POWER (mW)

THD+N (%)

100 300 400 500200

0.01

0.1

1

10

100

0.001
0600

fIN = 10kHz

fIN = 1kHz

fIN = 100Hz

VCC = 3V
R

L

= 4

Ω

A

V

= 2

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

MAX9718 toc14

OUTPUT POWER (mW)

THD+N (%)

100 300 400 500200

0.01

0.1

1

10

100

0.001
0 600

fIN = 1kHz

fIN = 100Hz

fIN = 10kHz

VCC = 3V
R

L

= 4

Ω

A

V

= 4

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

MAX9718 toc15

OUTPUT POWER (mW)

THD+N (%)

100 300 400 500200

0.01

0.1

1

10

100

0.001
0600

fIN = 1kHz

fIN = 100Hz

fIN = 10kHz

VCC = 3V
R

L

= 8

Ω

A

V

= 2

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

MAX9718 toc16

OUTPUT POWER (mW)

THD+N (%)

100 300 400 500200

0.01

0.1

1

10

100

0.001
0

fIN = 1kHz

fIN = 100Hz

fIN = 10kHz

VCC = 3V
R

L

= 8

Ω

A

V

= 4

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. COMMON-MODE VOLTAGE

MAX9718 toc17

COMMON-MODE VOLTAGE (V)

THD+N (%)

13452

0.001

0.01

0.0001
0

VCC = 5V
P

O

= 200mW

A

V

= 2

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. COMMON-MODE VOLTAGE

MAX9718 toc18

COMMON-MODE VOLTAGE (V)

THD+N (%)

0.5 1.5 2.0 2.5 3.01.0

0.001

0.01

0.0001
0

VCC = 3V
P

O

= 200mW

A

V

= 2

OUTPUT POWER

vs. SUPPLY VOLTAGE

MAX9718 toc19

SUPPLY VOLTAGE (V)

OUTPUT POWER

5.04.54.03.53.0

0.5

1.0

1.5

2.0

2.5

0

2.5 5.5

RL = 4

Ω

f = 1kHz
A

V

= 2

THD+N = 10%

THD+N = 1%

OUTPUT POWER

vs. SUPPLY VOLTAGE

MAX9718 toc20

SUPPLY VOLTAGE (V)

OUTPUT POWER (W)

5.04.54.03.53.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0

2.5 5.5

RL = 8

Ω

f = 1kHz
A

V

= 2

THD+N = 10%

THD+N = 1%

OUTPUT POWER

vs. LOAD RESISTANCE

MAX9718 toc21

LOAD RESISTANCE (Ω)

OUTPUT POWER (W)

10010

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

0

1

VCC = 5V
f = 1kHz
A

V

= 2

THD+N = 10%

THD+N = 1%

Typical Operating Characteristics (continued)

(VCC= 5V, C

BIAS

= 0.1µF, THD+N measurement bandwidth = 22Hz to 22kHz, TA= +25°C, unless otherwise noted.)

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

_______________________________________________________________________________________ 7

OUTPUT POWER

vs. LOAD RESISTANCE

MAX9718 toc22

LOAD RESISTANCE (Ω)

OUTPUT POWER (mW)

10010

200

100

300

400

500

600

0

1

THD+N = 10%

THD+N = 1%

VCC = 3V
f = 1kHz
A

V

= 2

POWER DISSIPATION

vs. OUTPUT POWER

MAX9718 toc23

OUTPUT POWER (W)

POWER DISSIPATION (W)

1.51.20.90.60.3

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0

0 1.8

VCC = 5V
R

L

= 4

Ω

f = 1kHz
A

V

= 2

POWER DISSIPATION

vs. OUTPUT POWER

MAX9718 toc24

OUTPUT POWER (W)

POWER DISSIPATION (W)

1.21.00.80.60.40.2

0.2

0.4

0.6

0.8

1.0

0

01.4

VCC = 5V
R

L

= 8

Ω

f = 1kHz
A

V

= 2

POWER DISSIPATION

vs. OUTPUT POWER

MAX9718 toc25

OUTPUT POWER (mW)

POWER DISSIPATION (mW)

600500400300200100

100

200

300

400

500

600

700

0

0700

VCC = 3V
R

L

= 4

Ω

f = 1kHz
A

V

= 2

POWER DISSIPATION

vs. OUTPUT POWER

MAX9718 toc26

OUTPUT POWER (mW)

POWER DISSIPATION (mW)

400300200100

50

100

150

200

250

300

350

0

0 500

VCC = 3V
R

L

= 8

Ω

f = 1kHz
A

V

= 2

GAIN AND PHASE

vs. FREQUENCY

MAX9718 toc27

FREQUENCY (Hz)

GAIN/PHASE (°/dB)

10k1k100

-120

-90

-60

-30

0

30

60

90

120

150

-150
10 100k

AV = 60dB

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

MAX9718 toc28

FREQUENCY (Hz)

PSRR (dB)

10k1k100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

-100
10 100k

V

RIPPLE

= 200mV

P-P

RL = 8

Ω

C

BIAS

= 1μF

VCC = 5V

VCC = 3V

COMMON-MODE REJECTION RATIO

vs. FREQUENCY

MAX9718 toc29

FREQUENCY (Hz)

CMRR (dB)

10k1k100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

-100
10 100k

V

RIPPLE

= 200mV

P-P

RL = 8

Ω

C

BIAS

= 1μF

VCC = 5V

VCC = 3V

Typical Operating Characteristics (continued)

(VCC= 5V, C

BIAS

= 0.1µF, THD+N measurement bandwidth = 22Hz to 22kHz, TA= +25°C, unless otherwise noted.)

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= 5V, C

BIAS

= 0.1µF, THD+N measurement bandwidth = 22Hz to 22kHz, TA= +25°C, unless otherwise noted.)

CROSSTALK

vs. FREQUENCY

MAX9718 toc31

FREQUENCY (Hz)

CROSSTALK (dB)

10k1k100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

-100

-110

-120
10 100k

CHANNEL 2

CHANNEL 1

VCC = 3V
V

RIPPLE

= 200mV

P-P

RL = 8

Ω

C

BIAS

= 1μF

ENTERING SHUTDOWN

MAX9718 toc32

100μs/div

C

BIAS

= 0.1μF

V

CC

= 3V

R

L

= 8Ω

SHDN
2V/div

OUT+
1V/div

OUT­1V/div

OUT+ - OUT­200mV/div

EXITING SHUTDOWN

MAX9718 toc33

4ms/div

C

BIAS

= 0.1μF

V

CC

= 3V

R

L

= 8Ω

SHDN
2V/div

OUT+
1V/div

OUT­1V/div

OUT+ - OUT­200mV/div

ENTERING POWER-DOWN

MAX9718 toc34

100μs/div

C

BIAS

= 0.1μF

V

CC

= 3V

R

L

= 8Ω

SHDN
1V/div

OUT+
1V/div

OUT­1V/div

OUT+ - OUT­200mV/div

EXITING POWER-DOWN

MAX9718 toc35

SHDN
2V/div

OUT+
1V/div

OUT­1V/div

4ms/div

C

BIAS

= 0.1μF

V

CC

= 3V

R

L

= 8Ω

OUT+ - OUT­200mV/div

CROSSTALK

vs. FREQUENCY

MAX9718 toc30

FREQUENCY (Hz)

CROSSTALK (dB)

10k1k100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

-100

-110

-120
10 100k

CHANNEL 2

CHANNEL 1

VCC = 5V
V

RIPPLE

= 200mV

P-P

RL = 8Ω,
C

BIAS

= 1μF