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 4

Ω load with less than 1% Total Harmonic

Distortion (THD) while operating from a single +5V sup-

ply. With an 8

Ω load, both devices deliver 1W continuous

power. These devices also deliver 350mW continuous

power into an 8

Ω 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 sup-

pression 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

Mobile Phones

PDAs

Portable Devices

Features

♦ 2.7V to 5.5V Single-Supply Operation

♦ 1.4W into 4Ω at 1% THD+N

♦ 10nA Low-Power Shutdown Mode

♦ 73dB PSRR at 1kHz

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

♦ Internal Fixed Gain to Reduce Component Count

(MAX9717B/C/D)

♦ Adjustable Gain Option (MAX9716/MAX9717A)

♦ BTL /SE Input Senses when Headphones are

Connected (MAX9717)

♦ Pin Compatible with LM4890 (MAX9716)

♦ Pin Compatible with TPA711 (MAX9717A)

♦ Available in Compact, Thermally Enhanced µMAX

and TDFN (3mm x 3mm) Packages

Low-Cost, Mono, 1.4W BTL Audio Power

Amplifiers

________________________________________________________________ Maxim Integrated Products

1

Ordering Information

BTL/SE

BIAS

IN-

MAX9717B/C/D

SINGLE SUPPLY

2.7V TO 5.5V

BIAS

IN-

MAX9716

SINGLE SUPPLY

2.7V TO 5.5V

Simplified Block Diagrams

19-3146; Rev 0; 1/04

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.

Pin Configurations and Selector Guide appear at end of data

sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

*Future product—contact factory for availability.

**EP = Exposed paddle.

PART

TEMP RANGE

PIN-

PACKAGE

GAIN

(dB)

MAX9716ETA

-40°C to +85°C

8 TDFN-EP**

Adj.

MAX9716EBL-T*

-40°C to +85°C

3 x 3 UCSP

Adj.

MAX9716EUA

-40°C to +85°C

8 µMAX-EP**

Adj.

Ordering Information continued at end of data sheet.