MAX9787 2.2W Stereo Audio Power Amplifier with Analog Volume Control

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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 potentiometer, 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 shutdown 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) package, and is specified over the extended -40°C to +85°C temperature range.

Key Features

Applications/Uses

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)

	Flat-Panel TVs
	LCD Projectors
	Multimedia Monitors
	Notebook PCs
	PC Displays
	Portable DVD Players
	Tablet PCs

Key Specifications: Speaker Amplifiers

Part Number

Class

Speaker Amp. V_CC (min) (V)

Speaker Amp. V_CC (max) (V)

Speaker Amp. I_CC (typ) (mA)

P_OUT into 4Ω @ 1% THD+N (W)

P_OUT into 4Ω @ 10% THD+N (W)

P_OUT into 8Ω @ 1% THD+N (W)

P_OUT into 8Ω @ 10% THD+N (W)

Speaker Amp. Half Pwr. THD+N (%)

SNR, A-weighted (dB)

PSRR (db)

Speaker Amp. External Gain

Speaker Amp. Fixed Gain (min) (V/V)

Speaker Amp. Fixed Gain (max) (V/V)

Features

Number of Channels

RoHS Available

Package

Smallest Available Package (max w/pins) (mm²)

Price^**

MAX9787

4.5

5.5

2.6

0.8

1.2

0.02

3.3

•	Analog Volme Control

Yes

THIN QFN/28

$1.35 @ 1k

See All Speaker Amplifiers (29)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.