MAXIM MAX9717 User Manual

General Description

The MAX9716/MAX9717 audio power amplifiers are ideal
for portable audio devices with internal speakers. A
bridge-tied load (BTL) architecture minimizes external
component count, while providing high-quality audio
reproduction. Both devices deliver 1.4W continuous
power into a 4Ω load with less than 1% Total Harmonic
Distortion (THD) while operating from a single +5V sup­ply. With an 8Ω load, both devices deliver 1W continuous
power. These devices also deliver 350mW continuous
power into an 8Ω load while operating from a single
+3.0V supply. The devices are available as adjustable
gain amplifiers (MAX9716/MAX9717A) or with internally
fixed gains of 6dB, 9dB, and 12dB (MAX9717B/
MAX9717C/MAX9717D), reducing component count.

A low-power shutdown mode disables the bias generator
and amplifiers, reducing quiescent current consumption
to less than 10nA. These devices feature Maxim’s
industry-leading, comprehensive click-and-pop sup­pression that reduces audible clicks and pops during
startup and shutdown.

The MAX9717 features a headphone sense input (BTL/SE)
that senses when a headphone is connected to the
device, disables the BTL slave driver, muting the speaker
while driving the headphone as a single-ended load.

The MAX9716 is pin compatible with the LM4890 and is
available in 9-bump UCSP™, 8-pin TDFN (3mm x
3mm), and 8-pin µMAX®packages. The MAX9717 is
available in 9-bump UCSP, 8-pin TDFN, and 8-pin
µMAX packages. Both devices operate over the -40°C
to +85°C extended temperature range.

Applications

Features

o 2.7V to 5.5V Single-Supply Operation
o 1.4W into 4Ω at 1% THD+N

o 10nA Low-Power Shutdown Mode

o 73dB PSRR at 1kHz

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

o Internal Fixed Gain to Reduce Component Count

(MAX9717B/C/D)

o Adjustable Gain Option (MAX9716/MAX9717A)
o BTL /SE Input Senses when Headphones are

Connected (MAX9717)

o Pin Compatible with LM4890 (MAX9716)

o Pin Compatible with TPA711 (MAX9717A)

o Available in Compact, Thermally Enhanced µMAX

and TDFN (3mm x 3mm) Packages

MAX9716/MAX9717

Low-Cost, Mono, 1.4W BTL Audio

Power Amplifiers

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

Simplified Block Diagrams

19-3146; Rev 3; 3/12

Pin Configurations and Selector Guide 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.

*

EP = Exposed pad.

+

Denotes a lead(Pb)-free/RoHS-compliant package.
G45 indicates protective die coating.
/V denotes automotive qualified part.

Ordering Information continued at end of data sheet.

Mobile Phones

PDAs

Portable Devices

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.

PART TEMP RANGE

MAX9716ETA+T -40°C to +85°C 8 TDFN-EP* Adj.

MAX9716EBL+TG45 -40°C to +85°C 3 x 3 UCSP Adj.

MAX9716EUA -40°C to +85°C 8 µMAX-EP* Adj.

MAX9716EUA/V+ -40°C to +85°C 8 µMAX-EP* Adj.

PIN­PACKAGE

GAIN

(dB)

SINGLE SUPPLY

2.7V TO 5.5V

BIAS

MAX9716

IN-

IN-

SINGLE SUPPLY

2.7V TO 5.5V

BIAS

MAX9717B/C/D

BTL/SE

V

CC

MAX9716/MAX9717

Low-Cost, Mono, 1.4W BTL Audio
Power Amplifiers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—5V Supply

(VCC= 5V, V

GND

= 0V, SHDN = VCC, TA= +25°C. C

BIAS

= 1µF, RIN= RF= 20kΩ (MAX9716/MAX9717A), IN+ = BIAS (MAX9716),

BTL/SE = GND (MAX9717_), R

L

= ∞ connected between OUT+ and OUT-. Typical values are at TA= +25°C.) (Note 2)

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, SHDN, BTL/SE Continuous Current...................20mA

OUT_ Short-Circuit Duration to GND or V

CC

(Note 1)...Continuous

Continuous Power Dissipation (T

A

= +70°C)

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

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

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

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

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

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

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

Soldering Temperature (reflow)

Lead(Pb)-Free Packages..............................................+260°C

Packages Containing Lead(Pb)....................................+240°C

Supply Voltage V

Quiescent Supply Current I

Shutdown Supply Current I

SHDN Threshold

BTL/SE Threshold

Common-Mode Bias Voltage V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CC

CC

SHDN

V

V

V

V

BIAS

Inferred by PSRR test 2.7 5.5 V

V

= V

IN+

= V

IN-

= -40°C to +85°C

T

A

SHDN = GND 0.01 1 µA

IH

IL

IH

IL

(Note 4)

(Note 3),

BIAS

4.3 8 mA

1.2

0.4

0.9 x
V

CC

0.7 x
V

CC

V

CC

- 6%

/2

V

CC

V

/2

CC

/2

+ 6%

V

V

V

Output Offset Voltage V

OS

Power-Supply Rejection Ratio PSRR

Output Power P

Total Harmonic Distortion Plus
Noise

OUT

THD+N

Output Noise Density e

V

= V

IN-

VCC = 2.7V to 5.5V DC, V

V

= V

IN+

V

RIPPLE

= 8Ω (Note 6)

R

L

RL = 8Ω, THD+N = 1%, f

RL = 4Ω, THD+N = 1%, f

RL = 16Ω, BTL/SE = VCC (single-ended
mode), THD+N = 1%, f

A

= 6dB, RL = 8Ω, fIN = 1kHz,

V

P

OUT

fIN = 10kHz 106 nV/√Hz

n

, V

OUT+

BIAS

= 200mV

= V

IN+

,

P-P

= 0.5W (Note 8)

(Note 5) ±7 ±15 mV

BIAS

= 1.5V 60 80

BIAS

f = 217Hz 61

,

f = 1kHz 73

= 1kHz (Note 7) 0.8 1.1

IN

= 1kHz (Note 7) 1.4

IN

= 1kHz

IN

0.155

0.024 %

Signal-to-Noise Ratio SNR THD+N = 1% 105 dB

dB

W

MAX9716/MAX9717

Low-Cost, Mono, 1.4W BTL Audio

Power Amplifiers

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—5V Supply (continued)

(VCC= 5V, V

GND

= 0V, SHDN = VCC, TA= +25°C. C

BIAS

= 1µF, RIN= RF= 20kΩ (MAX9716/MAX9717A), IN+ = BIAS (MAX9716),

BTL/SE = GND (MAX9717_), R

L

= ∞ connected between OUT+ and OUT-. Typical values are at TA= +25°C.) (Note 2)

ELECTRICAL CHARACTERISTICS—3V Supply

(VCC= 3V, V

GND

= 0V, SHDN = VCC, TA= +25°C. C

BIAS

= 1µF, RIN= RF= 20kΩ (MAX9716/MAX9717A), IN+ = BIAS (MAX9716),

BTL/SE = GND (MAX9717_), R

L

= ∞ connected between OUT+ and OUT-. Typical values are at TA= +25°C.) (Note 2)

Output Short-Circuit Current Limit I

Thermal Shutdown Threshold +160 °C

Thermal Shutdown Hysteresis 15 °C

Power-Up/Enable from Shutdown
Time (Note 10)

Shutdown Time t

Input Resistance R

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SC

t

PU

SHDN

(Note 9) 1.1 A

250

C

= 0.1µF 25

BIAS

5µs

MAX9717B/C/D 12 20 28 kΩ

IN

Quiescent Supply Current I

Shutdown Supply Current I

SHDN Threshold

BTL/SE Threshold

Common-Mode Bias Voltage V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

V

= V

CC

SHDN

V

IH

V

IL

V

IH

V

IL

BIAS

IN+

= V

IN-

T

= -40°C to +85°C

A

SHDN = GND 0.01 1 µA

(Note 4)

BIAS

(Note 3),

1.2

0.9 x
V

V

CC

- 9%

CC

4 8.0 mA

/2

/2

V

CC

0.4

0.7 x
V

CC

V

CC

+ 9%

/2

ms

V

V

V

Output Offset Voltage V

OS

Power-Supply Rejection Ratio PSRR

Output Power P

Total Harmonic Distortion Plus
Noise

OUT

THD+N

Output-Noise Density e

V

= V

IN-

= V

V

IN+

V

RIPPLE

= 8Ω (Note 6)

R

L

RL = 8Ω, THD+N = 1%, f

RL = 4Ω, THD+N = 1%, f

AV = 6dB, RL = 8Ω, fIN = 1kHz,
P

OUT

fIN = 10kHz 106 nV/√Hz

n

, V

= V

OUT+

,

BIAS

= 200mV

IN+

P-P

(Note 5) ±7 ±15 mV

BIAS

f = 217Hz 61

,

f = 1kHz 73

= 1kHz (Note 7) 350

IN

= 1kHz (Note 7) 525

IN

= 0.5W, VCC = 3V (Note 8)

0.024 %

dB

mW

Signal-to-Noise Ratio SNR THD+N = 1% 100 dB

MAX9716/MAX9717

Low-Cost, Mono, 1.4W BTL Audio
Power Amplifiers

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—3V Supply (continued)

(VCC= 3V, V

GND

= 0V, SHDN = VCC, TA= +25°C. C

BIAS

= 1µF, RIN= RF= 20kΩ (MAX9716/MAX9717A), IN+ = BIAS (MAX9716),

BTL/SE = GND (MAX9717_), R

L

= ∞ connected between OUT+ and OUT-. Typical values are at TA= +25°C.) (Note 2)

Note 1: Continuous power dissipation must also be observed.
Note 2: All specifications are tested at T

A

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

MIN

to T

MAX

) are not production tested,

and guaranteed by design.

Note 3: Quiescent power-supply current is specified and tested with no load. Quiescent power-supply current depends on the off-

set voltage when a practical load is connected to the amplifier.

Note 4: Common-mode bias voltage is the voltage on BIAS and is nominally V

CC

/2.

Note 5: V

OS

= V

OUT+

- V

OUT-.

Note 6: The amplifier input IN- is AC-coupled to GND through CIN.
Note 7: Output power is specified by a combination of a functional output current test and characterization analysis.
Note 8: Measurement bandwidth for THD+N is 22Hz to 22kHz.
Note 9: Extended short-circuit conditions result in a pulsed output.
Note 10: Time for V

OUT

to rise to 50% of final DC value.

Output Short-Circuit Current Limit I

Thermal Shutdown Threshold +160 °C

Thermal Shutdown Hysteresis 15 °C

Power-Up/Enable from Shutdown
Time (Note 10)

Shutdown Time t

Input Resistance R

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SC

t

PU

SHDN

IN

(Note 9) 1.1 A

250

C

= 0.1µF 25

BIAS

5µs

MAX9717B/C/D 12 20 28 kΩ

ms

MAX9716/MAX9717

Low-Cost, Mono, 1.4W BTL Audio

Power Amplifiers

_______________________________________________________________________________________

5

Typical Operating Characteristics

(VCC= 5V, THD+N measurement bandwidth = 22Hz to 22kHz, BTL mode, TA= +25°C, unless otherwise noted.)

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

100

VCC = 5V

= 8

R

Ω

L

= 6dB

A

10

V

1

THD+N (%)

0.1

0.01

0.001

OUTPUT POWER = 800mW

OUTPUT POWER = 30mW

10 100k

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

100

VCC = 3V

= 8

R

Ω

L

= 12dB

A

10

V

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

100

VCC = 5V

= 8

R

Ω

MAX9716 toc01

THD+N (%)

10k1k100

L

= 12dB

A

10

V

1

0.1

0.01

0.001

OUTPUT POWER = 800mW

OUTPUT POWER = 200mW

10 100k

FREQUENCY (Hz)

10k1k100

MAX9716 toc02

THD+N (%)

0.001

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

100

VCC = 5V

= 4

R

Ω

MAX9716 toc04

L

= 6dB

A

10

V

MAX9716 toc05

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

100

VCC = 3V

= 8

R

Ω

L

= 6dB

A

10

V

1

0.1

0.01

OUTPUT POWER = 250mW

OUTPUT POWER = 30mW

10 100k

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

100

VCC = 5V

= 4

R

Ω

L

= 12dB

A

10

V

MAX9716 toc03

10k1k100

MAX9716 toc06

1

THD+N (%)

0.1

0.01

0.001

OUTPUT POWER = 200mW

OUTPUT POWER = 50mW

10 100k

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

100

VCC = 3V

= 4

R

Ω

L

A

= 6dB

10

V

1

THD+N (%)

0.01

0.001

OUTPUT POWER = 350mW

0.1

OUTPUT POWER = 50mW

10 100k

FREQUENCY (Hz)

1

THD+N (%)

0.1

0.01

0.001

10k1k100

10 100k

OUTPUT POWER = 1W

OUTPUT POWER = 200mW

10k1k100

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

100

VCC = 3V

= 4

R

Ω

MAX9716 toc07

THD+N (%)

10k1k100

L

A

= 12dB

10

V

1

0.1

0.01

0.001

OUTPUT POWER = 350mW

OUTPUT POWER = 50mW

10 100k

FREQUENCY (Hz)

MAX9716 toc08

10k1k100

1

THD+N (%)

0.1

0.01

0.001

OUTPUT POWER = 1W

OUTPUT POWER = 250mW

10 100k

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. FREQUENCY (SINGLE-ENDED)

100

VCC = 5V

= 16

R

Ω

L

10

A

= 12dB

V

1

0.1

THD+N (%)

0.01

0.001

0.0001

OUTPUT POWER = 125mW

OUTPUT POWER = 25mW

10 100k

FREQUENCY (Hz)

10k1k100

MAX9716 toc09

10k1k100

MAX9716/MAX9717

Low-Cost, Mono, 1.4W BTL Audio
Power Amplifiers

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= 5V, THD+N measurement bandwidth = 22Hz to 22kHz, BTL mode, TA= +25°C, unless otherwise noted.)

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. OUTPUT POWER

MAX9716 toc10

OUTPUT POWER (W)

THD+N (%)

1.21.00.80.60.40.2

0.01

0.1

1

10

100

0.001

01.4

VCC = 5V
R

L

= 8

Ω

A

V

= 6dB

fIN = 100Hz

fIN = 1kHz

fIN = 10kHz

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. OUTPUT POWER

MAX9716 toc12

OUTPUT POWER (mW)

THD+N (%)

400300200100

0.01

0.1

1

10

100

0.001
0 500

VCC = 3V
R

L

= 8

Ω

A

V

= 6dB

fIN = 100Hz

fIN = 1kHz

fIN = 10kHz

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. OUTPUT POWER

MAX9716 toc13

OUTPUT POWER (mW)

THD+N (%)

400300200100

0.01

0.1

1

10

100

0.001
0 500

VCC = 3V
R

L

= 8

Ω

A

V

= 12dB

fIN = 100Hz

fIN = 1kHz

fIN = 10kHz

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. OUTPUT POWER

MAX9716 toc14

OUTPUT POWER (W)

THD+N (%)

1.81.61.41.21.00.80.60.40.2

0.01

0.1

1

10

100

0.001

02.0

VCC = 5V
R

L

= 4

Ω

A

V

= 6dB

fIN = 1kHz

fIN = 100Hz

fIN = 10kHz

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. OUTPUT POWER

MAX9716 toc17

OUTPUT POWER (mW)

THD+N (%)

700600500400300200100

0.01

0.1

1

10

100

0.001
0 800

VCC = 3V
R

L

= 4

Ω

A

V

= 12dB

fIN = 1kHz

fIN = 100Hz

fIN = 10kHz

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER (SINGLE-ENDED)

MAX9716 toc18

OUTPUT POWER (mW)

THD+N (%)

225200175150125100755025

0.01

0.1

1

10

100

0.001
0250

VCC = 5V
R

L

= 16

Ω

A

V

= 6dB

fIN = 100Hz

fIN = 10kHz

fIN = 1kHz

TOTAL HARMONIC DISTORTION PLUS

100

10

NOISE vs. OUTPUT POWER

VCC = 5V

= 8

R

Ω

L

= 12dB

A

V

1

MAX9716 toc11

THD+N (%)

0.001

TOTAL HARMONIC DISTORTION PLUS

100

10

NOISE vs. OUTPUT POWER

VCC = 3V

= 4

R

Ω

L

A

= 6dB

V

MAX9716 toc16

0.1

0.01

fIN = 10kHz

fIN = 1kHz

0

fIN = 100Hz

1.41.21.00.80.60.40.2

OUTPUT POWER (W)

TOTAL HARMONIC DISTORTION PLUS

NOISE vs. OUTPUT POWER

100

VCC = 5V

= 4

R

Ω

L

= 12dB

A

V

10

1

fIN = 10kHz

THD+N (%)

0.1

0.01

0.001

fIN = 100Hz

02.0

fIN = 1kHz

OUTPUT POWER (W)

MAX9716 toc15

1.81.61.41.21.00.80.60.40.2

1

THD+N (%)

0.1

0.01

0.001
0 800

fIN = 1kHz

fIN = 100Hz

OUTPUT POWER (mW)

fIN = 10kHz

700600500400300200100

MAX9716/MAX9717

Low-Cost, Mono, 1.4W BTL Audio

Power Amplifiers

_______________________________________________________________________________________

7

Typical Operating Characteristics (continued)

(VCC= 5V, THD+N measurement bandwidth = 22Hz to 22kHz, BTL mode, TA= +25°C, unless otherwise noted.)

OUTPUT POWER

vs. SUPPLY VOLTAGE

1.8
RL = 8

Ω

f = 1kHz

1.5

= 6dB

A

V

1.2

0.9

0.6

OUTPUT POWER (W)

0.3

0

2.5 5.5

THD+N = 10%

THD+N = 1%

SUPPLY VOLTAGE (V)

OUTPUT POWER

vs. LOAD RESISTANCE

700

600

500

400

300

OUTPUT POWER (mW)

200

100

THD+N = 1%

THD+N = 10%

5.04.54.03.53.0

VCC = 3V
f = 1kHz

= 6dB

A

V

3.0

2.5

MAX9716 toc19

2.0

1.5

1.0

OUTPUT POWER (W)

0.5

0

1.0

MAX9716 toc22

0.8

0.6

0.4

POWER DISSIPATION (W)

0.2

OUTPUT POWER

vs. SUPPLY VOLTAGE

RL = 4Ω
f = 1kHz

= 6dB

A

V

SUPPLY VOLTAGE (V)

POWER DISSIPATION

vs. OUTPUT POWER

VCC = 5V

= 8

R

Ω

L

f = 1kHz

= 6dB

A

V

THD+N = 10%

THD+N = 1%

5.04.54.03.53.02.5 5.5

2.5

MAX9716 toc20

2.0

1.5

1.0

OUTPUT POWER (mW)

0.5

0

300

250

MAX9716 toc23

200

150

100

POWER DISSIPATION (mW)

50

VCC = 5V
f = 1kHz
A

1100

OUTPUT POWER

vs. LOAD RESISTANCE

= 6dB

V

THD+N = 1%

LOAD RESISTANCE (Ω)

POWER DISSIPATION

vs. OUTPUT POWER

VCC = 3V

= 8Ω

R

L

f = 1kHz

= 6dB

A

V

MAX9716 toc21

THD+N = 10%

10

MAX9716 toc24

0

101 100

LOAD RESISTANCE (Ω)

POWER DISSIPATION

0

01.5

POWER DISSIPATION

vs. OUTPUT POWER

2.0
VCC = 5V

= 4

R

Ω

L

f = 1kHz

1.6
A

= 6dB

V

1.2

0.8

POWER DISSIPATION (W)

0.4

0

02.0
OUTPUT POWER (W)

1.61.20.80.4

700

600

MAX9716 toc25

500

400

300

200

POWER DISSIPATION (mW)

100

0

0 700

VCC = 3V

= 4Ω

R

L

f = 1kHz

= 6dB

A

V

OUTPUT POWER (W)

vs. OUTPUT POWER

OUTPUT POWER (mW)

1.20.90.60.3

0

OUTPUT POWER (mW)

4003002001000 500

OUTPUT-NOISE DENSITY

vs. FREQUENCY

600

500

Hz)

MAX9716 toc26

√

400

300

200

OUTPUT-NOISE DENSITY (nV/

100

0

600500400300200100

100 100k

FREQUENCY (Hz)

AV = 6dB

MAX9716 toc27

10k1k