Document
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 supply. With an 8Ω load, both devices deliver 1W continuous www.DataSheet4U.com 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. ♦ 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
Features
♦ 2.7V to 5.5V Single-Supply Operation
MAX9716/MAX9717
Ordering Information
PART MAX9716ETA MAX9716EBL-T* MAX9716EUA TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C PINPACKAGE 8 TDFN-EP** 3 x 3 UCSP 8 µMAX-EP** GAIN (dB) Adj. Adj. Adj.
Applications
Mobile Phones PDAs Portable Devices
*Future product—contact factory for availability. **EP = Exposed paddle. Ordering Information continued at end of data sheet. Pin Configurations and Selector Guide appear at end of data sheet.
Simplified Block Diagrams
SINGLE SUPPLY 2.7V TO 5.5V SINGLE SUPPLY 2.7V TO 5.5V
BIAS
BIAS
MAX9716
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..