MAX9787 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – 2.2W Stereo Audio Power Amplifier with Analog Volume Control

19-3882; Rev 0; 10/05
2.2W Stereo Audio Power Amplifier
with Analog Volume Control
General Description
The MAX9787 combines a stereo, 2.2W audio power
amplifier with an analog volume control in a single device.
A high 90dB PSRR and low 0.01% THD+N ensures clean,
low-distortion amplification of the audio signal.
The analog volume control can be driven with a poten-
tiometer, an RC-filtered PWM source, or a DAC output.
A BEEP input allows the addition of alert signals from
the controller to the audio path.
Industry-leading, click-and-pop suppression eliminates
audible transients during power and shutdown cycles.
Other features include single-supply voltage, a shut-
down mode, logic-selectable gain, thermal-overload,
and output short-circuit protection.
The MAX9787 is offered in a space-saving, thermally
efficient, 28-pin, thin QFN (5mm x 5mm x 0.8mm) pack-
age, and is specified over the extended -40°C to +85°C
temperature range.
Applications
Notebook PCs
Flat-Panel TVs
Portable DVD Players
LCD Projectors
Tablet PCs
Multimedia Monitors
PC Displays
Features
♦ Class AB, 2.2W, Stereo BTL Speaker Amplifiers
♦ Analog Volume Control
♦ BEEP Input with Glitch Filter
♦ 5V Single-Supply Operation
♦ High 90dB PSRR
♦ Low-Power Shutdown Mode
♦ Industry-Leading Click-and-Pop Suppression
♦ Low 0.01% THD+N at 1kHz
♦ Short-Circuit and Thermal Protection
♦ Selectable-Gain Settings
♦ Space-Saving 28-Pin TQFN (5mm x 5mm x 0.8mm)
Ordering Information
PART
MAX9787ETI+
PIN-PACKAGE
28 TQFN-EP*
PKG CODE
T2855N-1
Note: This device is specified for -40°C to +85°C operation.
+Denotes lead-free package.
*EP = Exposed paddle.
Typical Operating Circuit
+5V
Σ
Σ
BEEP
VOLUME
MAX9787
Pin Configuration
TOP VIEW
21 20 19 18 17 16 15
SHDN 22
14 N.C.
GAIN2 23
13 N.C.
GAIN1 24
V_DD 25
GND 26
MAX9787
12 V_SS
11 CPV_SS
10 C1N
INR 27
9 CPGND
VOL 28 *EP
8 C1P
+_{1 2 3 4 5 6 7}
*EXPOSED PAD.
THIN QFN
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