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 4; 9/06

For pricing, delivery, and ordering information, please contact Maxim/Dallas 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.

+Denotes lead-free package.
*EP = Exposed paddle.

PART TEMP RANGE

MAX9718AEBL-T -40°C to +85°C 3 x 3 UCSP ADX

MAX9718AEBL+T -40°C to +85°C 3 x 3 UCSP +ADX

MAX9718AETB-T -40°C to +85°C 10 TDFN-EP* AAV

PIN­PACKAGE

TOP

MARK

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

Supply Current I

Shutdown Supply Current I
SHDN, SHDN, SHDM

Threshold

SHDN, SHDN, SHDM
Threshold

Output Offset Voltage V

Common-Mode Input Voltage V

Input Impedance R

Common-Mode Rejection Ratio CMRR

Power-Supply Rejection Ratio PSRR

Output Power P

Total Harmonic Distortion Plus
Noise

CC

V

= V

= V

IN+

IN+

= V

= V

BIAS

BIAS

CC

SHDN

V

IH

V

IL

V

IH

V

IL

OS

IN-

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

MAX9718A/B/C/D

MAX9718E/F/G/H

V

IN-

Inferred from
CMRR test

IC

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

IN

f

= 1kHz -60

N

V

= V

= V

IN+

BIAS

= 200m V

= 1µF

BIAS

= 1kHz, P

IN

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

OUT

THD+N

IN-

V

RIPPLE

R

= 8Ω , C

L

THD+N = 1%,

= 1kHz (Note 4)

f

IN

R

= 8Ω, f

L

V

CC

2.7 5.5 V

, TA = -40°C to +85°C,

0.7 x V

5.0 7.5 mA

CC

0.3 x V

1.4

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

±1 ±10

AV = 3dB, MAX971_C/F ±1 ±15

AV = 6dB, MAX971_D/G ±1 ±20

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

AV = 3dB, MAX971_C/F 0.5 V CC - 0.6

A

= 6dB, MAX971_D/G 0.5 V CC - 0.8

V

-50 -60

,

f = 217Hz -93

,

P-P

f = 1kHz -90

R

= 8Ω 0.8 1.1

L

R

= 4Ω 1.4

L

= 0.75W,

OUT

0.002 %

CC

0.4

V

V

mV

V

dB

dB

W

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

Signal-to-Noise Ratio SNR P

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

OUT

= 1W, R

= 8Ω -104 dB

L

Thermal-Shutdown Threshold +160 °C

Thermal-Shutdown Hysteresis 15 °C

Maximum Capacitive Drive C

Power-Up/Enable from
Shutdown Time

Shutdown Time t

Turn-Off Transient V

LOAD

t

PU

SHDN

POP

Bridge-tied capacitance 500 pF

10 ms

3.5 µs

(Note 6) 50 mV

Crosstalk MAX9719, fIN = 1kHz -85 dB

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

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

V

= V

CC

SHDN

V

IH

V

IL

BIAS

IN+

= V

IN-

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

(Note 3)

, TA = -40°C to +85°C,

BIAS

AV = 0dB, MAX971_A/H

OS

V

= V

IN+

= V

IN-

MAX971_B/E

BIAS

AV = 3dB, MAX971_C/F ±1 ±15

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

= 1kHz -70

f

N

= V

V

IN-

V

RIPPLE

R

L

C

BIAS

= 8Ω ,

= 1µF

= V

IN+

= 200m V

BIAS

P-P

,

f = 217Hz -93

,

f = 1kHz -90

0.7 x V

CC

V

/2

CC

- 5%

-50 -60

3.8 6.0 mA

0.3 x V

CC

V

/2

V

CC

CC

/2

+ 5%

±1 ±10

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

Total Harmonic Distortion Plus
Noise

Thermal-Shutdown Threshold +160 °C

Thermal-Shutdown Hysteresis 15 °C

Maximum Capacitive Drive C

Power-Up/Enable from
Shutdown Time

Shutdown Time t

Turn-Off Transient V

Crosstalk MAX9719, fN = 1kHz -85 dB

R

OUT

THD+N

LOAD

t

PU

SHDN

POP

= 8Ω, THD+N = 1%, f

L

R

L

A

V

= 8Ω, f

= 6dB

= 1kHz, P

IN

Bridge-tied capacitance 500 pF

(Note 6) 40 mV

= 1kHz (Note 4) 475 mW

IN

= 0.25W,

OUT

0.003 %

10 ms

3µs

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

_______________________________________________________________________________________ 5

Typical Operating Characteristics (continued)

(VCC= 5V, C

BIAS

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

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

10

VCC = 5V

Ω

= 8

R

L

= 4

A

V

1

0.1

THD+N (%)

0.01

0.001

0.0001
10 100k

OUTPUT POWER = 800mW

OUTPUT POWER = 200mW

100 1k 10k

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

10

VCC = 3V

Ω

= 8

R

L

A

= 2

V

1

0.1

THD+N (%)

0.01

OUTPUT POWER = 100mW

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

10

VCC = 3V

Ω

= 4

R

L

= 4

A

V

1

0.1

THD+N (%)

0.01

0.001

0.0001
10 100k

OUTPUT POWER = 175mW

OUTPUT POWER = 70mW

100 1k 10k

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

100

VCC = 5V

Ω

= 4

R

L

A

= 2

V

10

1

THD+N (%)

fIN = 100Hz

0.1

MAX9718 toc04

MAX9718 toc07

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

10

VCC = 3V

Ω

= 4

R

L

= 2

A

V

1

0.1

THD+N (%)

0.01

0.001

0.0001
10 100k

OUTPUT POWER = 50mW

OUTPUT POWER = 250mW

100 1k 10k

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

10

VCC = 3V

Ω

= 8

R

L

A

= 4

V

1

0.1

THD+N (%)

0.01

OUTPUT POWER = 50mW

MAX9718 toc05

MAX9718 toc08

MAX9718 toc06

MAX9718 toc09

fIN = 10kHz

0.001

0.0001

OUTPUT POWER = 250mW

100 1k 10k

10 100k

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION PLUS NOISE

0.001

0.0001
10 100k

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

100

VCC = 5V

Ω

= 4

R

L

A

= 4

V

10

1

THD+N (%)

0.1

0.01

0.001

02.0

fIN = 100Hz

fIN = 1kHz

0.5 1.51.0
OUTPUT POWER (W)

fIN = 10kHz

MAX9718 toc10

100

VCC = 5V

= 8

R

L

A

= 2

V

10

1

THD+N (%)

0.1

0.01

0.001

0.2 0.6 0.8 1.0 1.20.4

0 1.4

OUTPUT POWER = 200mW

100 1k 10k

FREQUENCY (Hz)

vs. OUTPUT POWER

Ω

fIN = 1kHz

fIN = 100Hz

OUTPUT POWER (W)

fIN = 10kHz

0.01

0.001

0.2 0.4 0.6 0.8 1.2 1.41.0 1.8

02.0
OUTPUT POWER (W)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

100

VCC = 5V

Ω

= 8

R

L

A

MAX9718 toc11

THD+N (%)

0.001

= 4

V

10

1

0.1

0.01

0.2 0.6 0.8 1.0 1.20.4

0 1.4

fIN = 100Hz

fIN = 1kHz

OUTPUT POWER (W)

fIN = 1kHz

1.6

MAX9718 toc12

fIN = 10kHz

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= 5V, C

BIAS

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

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

100

VCC = 3V

Ω

= 4

R

L

= 2

A

V

10

1

THD+N (%)

0.1

0.01

0.001
100 300 400 500200

0600

fIN = 10kHz

fIN = 1kHz

OUTPUT POWER (mW)

fIN = 100Hz

MAX9718 toc13

THD+N (%)

0.01

0.001

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

100

VCC = 3V

Ω

= 8

R

L

A

10

1

THD+N (%)

0.1

= 4

V

fIN = 1kHz

fIN = 10kHz

MAX9718 toc16

0.001

THD+N (%)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

100

VCC = 3V

Ω

= 4

R

L

= 4

A

V

10

1

0.1

fIN = 1kHz

100 300 400 500200

0 600

OUTPUT POWER (mW)

fIN = 10kHz

fIN = 100Hz

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. COMMON-MODE VOLTAGE

0.01

VCC = 5V

= 200mW

P

O

= 2

A

V

MAX9718 toc14

MAX9718 toc17

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

100

VCC = 3V

Ω

= 8

R

L

= 2

A

V

10

1

THD+N (%)

0.1

fIN = 1kHz

0.01

0.001
100 300 400 500200

0600

OUTPUT POWER (mW)

fIN = 10kHz

fIN = 100Hz

MAX9718 toc15

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. COMMON-MODE VOLTAGE

0.01

VCC = 3V

= 200mW

P

0.001

THD+N (%)

O

= 2

A

V

MAX9718 toc18

0.01

fIN = 100Hz

0.001
0

100 300 400 500200

OUTPUT POWER (mW)

OUTPUT POWER

vs. SUPPLY VOLTAGE

2.5

2.0

1.5

1.0

OUTPUT POWER

0.5

Ω

RL = 4
f = 1kHz
A

= 2

V

THD+N = 10%

THD+N = 1%

0

2.5 5.5
SUPPLY VOLTAGE (V)

0.0001
13452

0

COMMON-MODE VOLTAGE (V)

OUTPUT POWER

vs. SUPPLY VOLTAGE

1.8

1.6

MAX9718 toc19

1.4

1.2

1.0

0.8

0.6

OUTPUT POWER (W)

0.4

0.2

5.04.54.03.53.0

Ω

RL = 8
f = 1kHz
A

= 2

V

THD+N = 10%

THD+N = 1%

0

2.5 5.5
SUPPLY VOLTAGE (V)

5.04.54.03.53.0

0.0001

MAX9718 toc20

OUTPUT POWER (W)

0.5 1.5 2.0 2.5 3.01.0

0

COMMON-MODE VOLTAGE (V)

OUTPUT POWER

vs. LOAD RESISTANCE

2.0

VCC = 5V

1.8

f = 1kHz

= 2

A

V

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

1

THD+N = 1%

LOAD RESISTANCE (Ω)

MAX9718 toc21

THD+N = 10%

10010

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

_______________________________________________________________________________________ 7

Typical Operating Characteristics (continued)

(VCC= 5V, C

BIAS

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

600

VCC = 3V
f = 1kHz

500

A

V

400

300

200

OUTPUT POWER (mW)

100

0

1

700

VCC = 3V
R

L

600

f = 1kHz
A

V

500

400

300

200

POWER DISSIPATION (mW)

100

0

0700

OUTPUT POWER

vs. LOAD RESISTANCE

1.8

VCC = 5V

= 4

R

1.6

L

= 2

THD+N = 1%

LOAD RESISTANCE (Ω)

MAX9718 toc22

THD+N = 10%

10010

f = 1kHz

1.4

= 2

A

V

1.2

1.0

0.8

0.6

POWER DISSIPATION (W)

0.4

0.2

0

0 1.8

POWER DISSIPATION

vs. OUTPUT POWER

350

Ω

= 4

= 2

OUTPUT POWER (mW)

MAX9718 toc25

600500400300200100

VCC = 3V

= 8

R

L

300

f = 1kHz

= 2

A

V

250

200

150

100

POWER DISSIPATION (mW)

50

0

0 500

POWER DISSIPATION

vs. OUTPUT POWER

Ω

OUTPUT POWER (W)

POWER DISSIPATION

vs. OUTPUT POWER

Ω

OUTPUT POWER (mW)

POWER DISSIPATION

1.0

MAX9718 toc23

0.8

0.6

0.4

POWER DISSIPATION (W)

0.2

0

1.51.20.90.60.3

MAX9718 toc26

400300200100

01.4

150

120

90

60

30

0

-30

GAIN/PHASE (°/dB)

-60

-90

-120

-150
10 100k

vs. OUTPUT POWER

VCC = 5V

Ω

= 8

R

L

f = 1kHz

= 2

A

V

GAIN AND PHASE

AV = 60dB

MAX9718 toc24

1.21.00.80.60.40.2

OUTPUT POWER (W)

vs. FREQUENCY

MAX9718 toc27

10k1k100

FREQUENCY (Hz)

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

0

V

= 200mV

RIPPLE

-10

RL = 8
C

BIAS

-20

-30

-40

-50

PSRR (dB)

-60

-70

-80

-90

-100
10 100k

Ω

= 1μF

VCC = 5V

P-P

VCC = 3V

FREQUENCY (Hz)

MAX9718 toc28

10k1k100

COMMON-MODE REJECTION RATIO

vs. FREQUENCY

0

V

= 200mV

RIPPLE

-10

RL = 8
C

BIAS

-20

-30

-40

-50

CMRR (dB)

-60

-70

-80

-90

-100
10 100k

Ω

= 1μF

VCC = 5V

VCC = 3V

P-P

FREQUENCY (Hz)

MAX9718 toc29

10k1k100

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

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

_______________________________________________________________________________________ 9

Typical Operating Characteristics (continued)

(VCC= 5V, C

BIAS

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

Pin Description

6

5

4

3

2

SUPPLY CURRENT (mA)

1

0

-40 85

MAX9718 MAX9719

TDFN/

µMAX

1 C2 — — — SHDN

—— 9 B311SHDN Shutdown Input. Active-low shutdown input.

2 C1 — — — IN- Inverting Input

3 B2 — — — SHDM

4 A1 — — — IN+ Noninverting Input

5 A2 5 B2 7 BIAS DC Bias Bypass

6 A3 — — — OUT- Bridge Amplifier Negative Output

7 B3 1, 6, 11

8 — 13 — 15 N.C. No Connection. Not internally connected.

9 B1 8, 14 A4, D3 16, 10 V

10 C3 — — — OUT+ Bridge Amplifier Positive Output

— — 2 C1 4 INR+ Right-Channel Noninverting Input

— — 3 B1 5 INL- Left-Channel Inverting Input

— — 4 A1 6 INL+ Left-Channel Noninverting Input

— — 7 A3 9 OUTL+ Left-Channel Bridge Amplifier Positive Output

— — 10 B4 12 OUTL- Left-Channel Bridge Amplifier Negative Output

SUPPLY CURRENT

vs. TEMPERATURE

VCC = 5V

VCC = 3V

TEMPERATURE (°C)

0.03

0.02

MAX9718 toc36

0.01

0

-0.01

SHUTDOWN CURRENT (μA)

-0.02

-0.03

603510-15

-40 85

SHUTDOWN CURRENT

vs. TEMPERATURE

VCC = 5V

TEMPERATURE (°C)

VCC = 3V

603510-15

MAX9718 toc37

TURN-ON TIME (ms)

vs. DC BIAS BYPASS CAPACITOR

80

TO -3dB OF FINAL VALUE

70

60

50

40

30

20

10

0

0 1.00

PIN

NAME FUNCTION

UCSP TQFN UCSP TSSOP

Shutdown Input. The polarity of SHDN is dependent on the state
of SHDM.

Shutdown-Mode Polarity Input. SHDM controls the polarity of
SHDN. Connect SHDM high for an active-high SHDN input.
Connect SHDM low for an active-low SHDN input (see Table 1).

A2,

C2, C4

3, 8,13 GND Ground

Power Supply

CC

TURN-ON TIME

VCC = 5V

VCC = 3V

0.800.600.20 0.40

C

(μF)

BIAS

MAX9718 toc38

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

10 ______________________________________________________________________________________

Pin Description (continued)

Detailed Description

The MAX9718/MAX9719 are 1.4W BTL speaker ampli­fiers. The MAX9718 is a mono speaker amplifier, while
the MAX9719 is a stereo speaker amplifier. Both
devices feature a low-power shutdown mode, and
industry-leading click-and-pop suppression. The
MAX9718 features a two-input shutdown scheme to
configure shutdown for active high or active low. These
devices consist of high output-current audio amps con­figured as BTL amplifiers (see the Functional Diagrams).
Both adjustable and fixed gain (0dB, 3dB, 6dB) versions
are available.

BIAS

These devices operate from a single 2.7V to 5.5V sup­ply and feature an internally generated, common-mode
bias voltage of VCC/ 2 referenced to ground. BIAS pro­vides both click-and-pop suppression and sets the DC
bias level for the audio outputs. Choose the value of the
bypass capacitor as described in the BIAS Capacitor
section. Do not connect external loads to BIAS as this
can affect the overall performance.

Shutdown Mode

The MAX9718/MAX9719 feature a 100nA low-power
shutdown mode that reduces quiescent current con­sumption. Entering shutdown disables the device’s bias
circuitry, the amplifier outputs go high impedance, and
BIAS is driven to GND. The MAX9718 SHDM input con­trols the polarity of SHDN. Drive SHDM high for an
active-high SHDN input. Drive SHDM low for an active­low SHDN input (see Table 1). The MAX9719 features
an active-low shutdown input, SHDN.

Click-and-Pop Suppression

The MAX9718/MAX9719 feature Maxim’s industry-lead­ing click-and-pop suppression circuitry. During startup,
the amplifier common-mode bias voltage ramps to the
DC bias point. When entering shutdown, the amplifier
outputs are high impedance to 100kΩ between both
outputs. This scheme minimizes the energy present in
the audio band.

Applications Information

BTL Amplifier

The MAX9718/MAX9719 are designed to drive a load
differentially, a configuration referred to as bridge-tied
load or BTL. The BTL configuration (Figure 1) offers
advantages over the single-ended configuration, where
one side of the load is connected to ground. Driving the
load differentially doubles the output voltage compared
to a single-ended amplifier under similar conditions.

Substituting 2 x V

OUT(P-P)

for V

OUT(P-P)

into the following
equations yields four times the output power due to
doubling of the output voltage:

Since the differential outputs are biased at midsupply,
there is no net DC voltage across the load. This elimi­nates the need for DC-blocking capacitors required for
single-ended amplifiers. These capacitors can be
large, expensive, consume board space, and degrade
low-frequency performance.

P

V

R

OUT

RMS

L

=

2

V

V

RMS

OUT P P

=

−()

22

Table 1. Shutdown Mode Selection
(MAX9718 Only)

PIN

MAX9718 MAX9719

TDFN/

µMAX

— — 12 D4 14 OUTR+ Right-Channel Bridge Amplifier Positive Output

— — 15 D2 1 OUTR- Right-Channel Bridge Amplifier Negative Output

— — 16 D1 2 INR- Right-Channel Inverting Input

EP — EP — EP EP Exposed Pad. Connect EP to GND.

UCSP TQFN UCSP TSSOP

NAME FUNCTION

SHDM SHDN OPERATIONAL MODE

0 0 Shutdown

0 1 Normal operation

1 0 Normal operation

1 1 Shutdown

Power Dissipation and Heat Sinking

Under normal operating conditions, the MAX9718/
MAX9719 dissipate a significant amount of power. The
maximum power dissipation for each package is given
in the Absolute Maximum Ratings section under
Continuous Power Dissipation or can be calculated by
the following equation:

where T

J(MAX)

is +150°C, TAis the ambient tempera-

ture, and θJAis the reciprocal of the derating factor in
°C/W as specified in the Absolute Maximum Ratings
section. For example, θJAof the TQFN package is
+59.2°C/W.

The increase in power delivered by the BTL configura­tion directly results in an increase in internal power dis­sipation over the single-ended configuration. The
maximum internal power dissipation for a given V

CC

and load is given by the following equation:

If the internal power dissipation for a given application
exceeds the maximum allowed for a given package,
reduce power dissipation by increasing the ground
plane heat-sinking capability and the size of the traces
to the device (see the Layout and Grounding section).
Other methods for reducing power dissipation are to
reduce V

CC

, increase load impedance, decrease ambi-

ent temperature, reduce gain, or reduce input signal.

Thermal-overload protection limits total power dissipa­tion in the MAX9718/MAX9719. When the junction tem­perature exceeds +160°C, the thermal protection
circuitry disables the amplifier output stage. The ampli­fiers are enabled once the junction temperature cools

by 15°C. A pulsing output under continuous thermal
overload results as the device heats and cools.

For optimum power dissipation and heat sinking, con­nect the exposed pad found on the µMAX, TDFN,
TQFN, and TSSOP packages to a large ground plane.

Fixed Differential Gain

The MAX9718B/E, MAX9718C/F, MAX9718D/G,
MAX9719B, MAX9719C, and MAX9719D feature inter­nally fixed gains (see the Selector Guide). This simpli­fies design, decreases required footprint size, and
eliminates external gain-setting resistors. Resistors R1
and R2 shown in the Typical Operating Circuit are used
to achieve each fixed gain.

Adjustable Differential Gain

Gain-Setting Resistors

External feedback resistors set the gain of the
MAX9718A/H and MAX9719A. Resistors RFand R

IN

(Figure 2) set the gain of the amplifier as follows:

where AVis the desired voltage gain. Hence, an RINof
10kΩ and an RFof 20kΩ yields a gain of 2V/V, or 6dB.

RFcan be either fixed or variable, allowing the use of a
digitally controlled potentiometer to alter the gain under
software control.

A

R

R

V

F

IN

=

P

V

R

D MAX

CC

()

=

2

2

2

π

P

TT

D MAX

J MAX A

JA

()

()

=

−

θ

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

______________________________________________________________________________________ 11

Figure 1. Bridge-Tied Load Configuration

Figure 2. Setting the MAX9718A/H/MAX9719A Gain

+1

-1

V

OUT(P-P)

2 x V

V

OUT(P-P)

OUT(P-P)

R

F

R

F

MAX9718A/H

R

INVERTING

DIFFERENTIAL

INPUT

(OPTIONAL)

NONINVERTING

DIFFERENTIAL

INPUT

(OPTIONAL)

IN

R

IN

MAX9719A

IN-

OUT+

OUT-

GENERATOR

IN+

BIAS

MAX9718/MAX9719

Input Filter

The fully differential amplifier inputs can be biased at
voltages other than midsupply. The common-mode
feedback circuit adjusts for input bias, ensuring the
outputs are still biased at midsupply. Input capacitors
are not required as long as the common-mode input
voltage is within the specified range listed in the
Electrical Characteristics table.

If input capacitors are used, input capacitor CIN, in
conjunction with RIN, forms a highpass filter that
removes the DC bias from an incoming signal. The AC­coupling capacitor allows the amplifier to bias the sig­nal to an optimum DC level. Assuming zero-source
impedance, the -3dB point of the highpass filter is
given by:

Setting f

-3dB

too high affects the low-frequency
response of the amplifier. Use capacitors with
dielectrics that have low-voltage coefficients, such as
tantalum or aluminum electrolytic. Capacitors with high­voltage coefficients, such as ceramics, can increase
distortion at low frequencies.

BIAS Capacitor

BIAS is the output of the internally generated V

CC

/2

bias voltage. The BIAS bypass capacitor, C

BIAS

,
improves PSRR and THD+N by reducing power supply
and other noise sources at the common-mode bias
node, and also generates the clickless/popless startup
DC bias waveform for the speaker amplifiers. Bypass
BIAS with a 0.1µF capacitor to GND. Larger values of
C

BIAS

(up to 1µF) improve PSRR, but slow down

tON/t

OFF

times. A 1µF C

BIAS

capacitor slows turn-on
and turn-off times by 10 and improves PSRR by 20dB
(at 1kHz). Do not connect external loads to BIAS.

Supply Bypassing

Proper power-supply bypassing ensures low-noise,
low-distortion performance. Connect a 1µF ceramic
capacitor from VCCto GND. Add additional bulk
capacitance as required by the application. Locate the
bypass capacitor as close to the device as possible.

Layout and Grounding

Good PC board layout is essential for optimizing perfor­mance. Use large traces for the power-supply inputs and
amplifier outputs to minimize losses due to parasitic trace
resistance and route heat away from the device. Good
grounding improves audio performance, minimizes
crosstalk between channels, and prevents any digital
switching noise from coupling into the audio signal.

The MAX9718/MAX9719 TDFN, TQFN, TSSOP, and
µMAX packages feature exposed thermal pads on their
undersides. This pad lowers the thermal resistance of the
package by providing a direct-heat conduction path
from the die to the PC board. Connect the exposed pad
to the ground plane using multiple vias, if required.

UCSP Applications Information

For the latest application details on UCSP construction,
dimensions, tape carrier information, PC board tech­niques, bump-pad layout, and recommended reflow
temperature profile, as well as the latest information on
reliability testing results, refer to the Application Note:
UCSP—A Wafer-Level Chip-Scale Package available
on Maxim’s website at www.maxim-ic.com/ucsp.

f

RC

dB

IN IN

−

=

3

1

2π

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

12 ______________________________________________________________________________________

Selector Guide

PART MONO STEREO

MAX9718A/H √ — Adjustable √
MAX9718B/E √ —0 √
MAX9718C/F √ —3 √
MAX9718D/G √ —6 √
MAX9719A — √ Adjustable —
MAX9719B — √ 0—
MAX9719C — √ 3—
MAX9719D — √ 6—

GAIN

(dB)

SELECTABLE

SHUTDOWN

POLARITY

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

______________________________________________________________________________________ 13

Ordering Information (continued)

Chip Information

MAX9718 TRANSISTOR COUNT: 2359

MAX9719 TRANSISTOR COUNT: 4447

PROCESS: BiCMOS

UCSP Marking Information:

■: A1 Bump indicator

AAA: Product code

XXX: Lot code

+Denotes lead-free package.
*EP = Exposed paddle.

PART TEMP RANGE

MAX9718AETB+T -40°C to +85°C 10 TDFN-EP* +AAV

MAX9718AEUB -40°C to +85°C 10 µMAX-EP* AAAA

MAX9718AEUB+ -40°C to +85°C 10 µMAX-EP* +AAAA

MAX9718BEBL-T -40°C to +85°C 3 x 3 UCSP ADY

MAX9718BEBL+T -40°C to +85°C 3 x 3 UCSP +ADY

MAX9718BETB-T -40°C to +85°C 10 TDFN-EP* AAW

MAX9718BETB+T -40°C to +85°C 10 TDFN-EP* +AAW

MAX9718BEUB -40°C to +85°C 10 µMAX-EP* AAAB

MAX9718BEUB+ -40°C to +85°C 10 µMAX-EP* +AAAB

MAX9718CEBL-T -40°C to +85°C 3 x 3 UCSP ADZ

MAX9718CEBL+T -40°C to +85°C 3 x 3 UCSP +ADZ

MAX9718CETB-T -40°C to +85°C 10 TDFN-EP* AAX

MAX9718CETB+T -40°C to +85°C 10 TDFN-EP* +AAX

MAX9718CEUB -40°C to +85°C 10 µMAX-EP* AAAC

MAX9718CEUB+ -40°C to +85°C 10 µMAX-EP* +AAAC

MAX9718DEBL-T -40°C to +85°C 3 x 3 UCSP AEA

MAX9718DEBL+T -40°C to +85°C 3 x 3 UCSP +AEA

MAX9718DETB-T -40°C to +85°C 10 TDFN-EP* AAY

MAX9718DETB+T -40°C to +85°C 10 TDFN-EP* +AAY

MAX9718DEUB -40°C to +85°C 10 µMAX-EP* AAAD

MAX9718DEUB+ -40°C to +85°C 10 µMAX-EP* +AAAD

MAX9718EEBL+T -40°C to +85°C 3 x 3 UCSP +AFB

MAX9718EETB+T -40°C to +85°C 10 TDFN-EP* +ASY

MAX9718EEUB+ -40°C to +85°C 10 µMAX-EP* +AAAJ

MAX9718FEBL+T -40°C to +85°C 3 x 3 UCSP +AFC

MAX9718FETB+T -40°C to +85°C 10 TDFN-EP* +ASZ

MAX9718FEUB+ -40°C to +85°C 10 µMAX-EP* +AAAK

MAX9718GEBL+T -40°C to +85°C 3 x 3 UCSP +AFD

MAX9718GETB+T -40°C to +85°C 10 TDFN-EP* +ATA

MAX9718GEUB+ -40°C to +85°C 10 µMAX-EP* +AAAL

MAX9718HEBL+T -40°C to +85°C 3 x 3 UCSP +AFE

MAX9718HETB+T -40°C to +85°C 10 TDFN-EP* +ATB

MAX9718HEUB+ -40°C to +85°C 10 µMAX-EP* +AAAM

MAX9719AEBE-T -40°C to +85°C 4 x 4 UCSP —

MAX9719AEBE+T -40°C to +85°C 4 x 4 UCSP —

PIN­PACKAGE

TOP

MARK

PART TEMP RANGE

MAX9719AETE -40°C to +85°C 16 TQFN-EP* —

MAX9719AETE+ -40°C to +85°C 16 TQFN-EP* —

MAX9719AEUE -40°C to +85°C 16 TSSOP-EP* —

MAX9719AEUE+ -40°C to +85°C 16 TSSOP-EP* —

MAX9719BEBE-T -40°C to +85°C 4 x 4 UCSP —

MAX9719BEBE+T -40°C to +85°C 4 x 4 UCSP —

MAX9719BETE -40°C to +85°C 16 TQFN-EP* —

MAX9719BETE+ -40°C to +85°C 16 TQFN-EP* —

MAX9719BEUE -40°C to +85°C 16 TSSOP-EP* —

MAX9719BEUE+ -40°C to +85°C 16 TSSOP-EP* —

MAX9719CEBE-T -40°C to +85°C 4 x 4 UCSP —

MAX9719CEBE+T -40°C to +85°C 4 x 4 UCSP —

MAX9719CETE -40°C to +85°C 16 TQFN-EP* —

MAX9719CETE+ -40°C to +85°C 16 TQFN-EP* —

MAX9719CEUE -40°C to +85°C 16 TSSOP-EP* —

MAX9719CEUE+ -40°C to +85°C 16 TSSOP-EP* —

MAX9719DEBE-T -40°C to +85°C 4 x 4 UCSP —

MAX9719DEBE+T -40°C to +85°C 4 x 4 UCSP —

MAX9719DETE -40°C to +85°C 16 TQFN-EP* —

MAX9719DETE+ -40°C to +85°C 16 TQFN-EP* —

MAX9719DEUE -40°C to +85°C 16 TSSOP-EP* —

MAX9719DEUE+ -40°C to +85°C 16 TSSOP-EP* —

AAA
XXX

PIN­PACKAGE

TOP

MARK

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

14 ______________________________________________________________________________________

System Diagram

2.7V TO 5.5V

10μF

1μF

IN1+

IN1-

IN2+

IN2-

1μF

V

CC

INL+

INL-

INR+

INR-

GND

SHDN

Q

Q

SHDN

INL

MAX9719

MAX961

MAX9722B

OUTL+

OUTL-

OUTR+

OUTR-

BIAS

V

OUTL

IN-

IN+

0.1μF

CC

0.1μF 0.1μF

2.7V TO 5.5V

220kΩ

2.7V TO 5.5V

1μF

INR

PV

DD

SV

DD

C1P CIN

AUTOMATIC HEADPHONE DETECTION AND SPEAKER DISABLE CIRCUIT

1μF

OUTR

PV

SV

SS

SS

1μF0.1μF1μF

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

______________________________________________________________________________________ 15

Functional Diagrams

2.7V TO 5.5V
SUPPLY

V

CC

IN-

IN+

BIAS

SHDN

SHDM

GND

BIAS

GENERATOR

SHUTDOWN

CONTROL

R

2

R

1

OUT+

R

1

R

2

OUT-

MAX9718B/E
MAX9718C/F
MAX9718D/G

INVERTING

DIFFERENTIAL

INPUT

NONINVERTING

DIFFERENTIAL

INPUT

1.0μF

C

IN

(OPTIONAL)

C

IN

(OPTIONAL)

C

BIAS

0.1μF

INVERTING

DIFFERENTIAL

INPUT

NONINVERTING

DIFFERENTIAL

INPUT

MAX9718A

= 2

A

V

= 1Hz

f

C

= 1μF

C

IN

= 10kΩ

R

IN

= 20kΩ

R

F

2.7V TO 5.5V

1.0μF

C

IN

(OPTIONAL)

C

IN

(OPTIONAL)

SUPPLY

R

IN

R

IN

C

BIAS

0.1μF

V

CC

IN-

IN+

BIAS

SHDN

SHDM

GND

R

F

BIAS

GENERATOR

SHUTDOWN

CONTROL

R

F

MAX9718A/H

OUT+

OUT-

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

16 ______________________________________________________________________________________

Functional Diagrams (continued)

2.7V TO 5.5V
SUPPLY

1.0μF

C

INVERTING

DIFFERENTIAL

INPUT

NONINVERTING

DIFFERENTIAL

INPUT

INVERTING

DIFFERENTIAL

INPUT

NONINVERTING

DIFFERENTIAL

INPUT

IN

(OPTIONAL)

C

IN

(OPTIONAL)

C

BIAS

0.1μF

C

IN

(OPTIONAL)

C

IN

(OPTIONAL)

V

CC

INL-

INL+

BIAS

SHDN

INR-

INR+

GND

MAX9719B
MAX9719C
MAX9719D

BIAS

GENERATOR

R

1

R

1

SHUTDOWN

CONTROL

R

1

R

1

R

2

OUTL+

OUTL-

R

2

R

2

OUTR+

OUTR-

R

2

MAX9719A

= 2

A

V

= 1Hz

f

C

= 1μF

C

IN

= 10kΩ

R

IN

= 20kΩ

R

F

INVERTING

DIFFERENTIAL

INPUT

NONINVERTING

DIFFERENTIAL

INPUT

INVERTING

DIFFERENTIAL

INPUT

NONINVERTING

DIFFERENTIAL

INPUT

2.7V TO 5.5V

1.0μF

C

IN

(OPTIONAL)

C

IN

(OPTIONAL)

C

IN

(OPTIONAL)

C

IN

(OPTIONAL)

SUPPLY

R

IN

R

IN

C

BIAS

0.1μF

R

IN

R

IN

V

CC

INL-

INL+

BIAS

SHDN

INR-

INR+

GND

R

F

MAX9719A

BIAS

GENERATOR

R

F

R

F

SHUTDOWN

CONTROL

R

F

OUTL+

OUTL-

OUTR+

OUTR-

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

______________________________________________________________________________________ 17

Pin Configurations

TOP VIEW TOP VIEW

(BUMPS ON BOTTOM)

SHDN

SHDM

1

IN-

2

3

MAX9718

4

5

10

OUT+

9

V

CC

N.C.

8

GNDIN+

7

OUT-BIAS

6

μMAX 3 × 3 UCSP

TOP VIEW

TOP VIEW
(BUMPS ON BOTTOM)

SHDN

SHDM

1

2

IN-

3

MAX9718

4

5

10

OUT+

9

V

CC

8

N.C.

7

GNDIN+

OUT-BIAS

6

TDFN

(3mm × 3mm × 0.8mm)

BIAS

SHDM

SHDN

MAX9718

OUTL+

SHDN

V

CC

OUT-

OUT+

123

IN+

A

V

B

CC

IN-

C

1234

GND

INL+

A

BIAS

INL-

B

GND GND

INR+

C

INR-

D

OUTR-

GND

MAX9719

OUTL-

OUTR+

V

CC

TOP VIEW TOP VIEW

OUTR+

GND

OUTL-

SHDN

12

11 10 9

N.C.

V

13

14

CC

V

8

CC

OUTL+

7

MAX9719

OUTR-

INR-

15

16

1234

GND

INR+

INL-

INL+

GND

6

BIAS

5

TQFN

(4mm × 4mm × 0.8mm)

OUTR-

INR-

GND

INR+

INL-

INL+

BIAS

GND

1

2

3

4

5

6

7

8

4 × 4 UCSP

MAX9719

TSSOP-EP

16

V

CC

15

N.C.

14

OUTR+

13

GND

12

OUTL-

SHDN

11

10

V

CC

OUTL+

9

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

18 ______________________________________________________________________________________

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages

.)

9LUCSP, 3x3.EPS

PACKAGE OUTLINE, 3x3 UCSP

21-0093

1

L

1

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

______________________________________________________________________________________ 19

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages

.)

6, 8, &10L, DFN THIN.EPS

COMMON DIMENSIONS
SYMBOL MIN. MAX.

A 0.70 0.80
D 2.90 3.10
E 2.90 3.10
A1

0.00 0.05

L 0.20 0.40

0.25 MIN.k

A2 0.20 REF.

PACKAGE VARIATIONS
PKG. CODE N D2 E2 e JEDEC SPEC b
T633-2 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF
T833-2 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF
T833-3 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF

1.50±0.10 MO229 / WEED-3

2.30±0.10 MO229 / WEED-3 2.00 REF0.25±0.050.50 BSC1.50±0.1010T1033-2

0.40 BSC - - - - 0.20±0.05 2.40 REFT1433-2 14 2.30±0.101.70±0.10

[(N/2)-1] x e

2.00 REF0.25±0.050.50 BSC2.30±0.1010T1033-1

2.40 REF0.20±0.05- - - - 0.40 BSC1.70±0.10 2.30±0.1014T1433-1

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

20 ______________________________________________________________________________________

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages

.)

10L UMAX, EXPPADS.EPS

21-0109

1

D

1

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

______________________________________________________________________________________ 21

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages

.)

16L,UCSP.EPS

PACKAGE OUTLINE, 4x4 UCSP

21-0101

1

H

1

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

22 ______________________________________________________________________________________

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages

.)

24L QFN THIN.EPS

MAX9718/MAX9719

Low-Cost, Mono/Stereo,

1.4W Differential Audio Power Amplifiers

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 23

© 2006 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages

.)

Revision History

Pages changed at Rev 3: 1-4, 11, 12, 13, 15, 16, 17-20, 23

AA AA

TSSOP 4.4mm BODY.EPS