Rainbow Electronics MAX9717 - 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 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 4 Ω 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
µ
MAX
and TDFN (3mm x 3mm) Packages
MAX9716/MAX9717
Low-Cost, Mono, 1.4W BTL Audio Power
Amplifiers
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
V CC
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)
MAX9716 ETA -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.