MAX9716 Datasheet, PDF (1/19 Pages) Maxim Integrated Products – Low-Cost, Mono, 1.4W BTL Audio Power Amplifiers

19-3146; Rev 0; 1/04
Low-Cost, Mono, 1.4W BTL Audio Power
Amplifiers
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 sup-
ply. 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 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
SINGLE SUPPLY
2.7V TO 5.5V
BIAS
MAX9716
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
Ordering Information
PART
TEMP RANGE ^PIN-
PACKAGE
MAX9716ETA
-40°C to +85°C 8 TDFN-EP**
MAX9716EBL-T* -40°C to +85°C 3 x 3 UCSP
MAX9716EUA
-40°C to +85°C 8 µMAX-EP**
*Future product—contact factory for availability.
**EP = Exposed paddle.
Ordering Information continued at end of data sheet.
GAIN
(dB)
Adj.
Adj.
Adj.
Pin Configurations and Selector Guide appear at end of data
sheet.
Simplified Block Diagrams
SINGLE SUPPLY
2.7V TO 5.5V
BIAS
MAX9717B/C/D
IN-
IN-
BTL/SE
VCC
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
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.