MAX9750 Datasheet, PDF (1/30 Pages) Maxim Integrated Products – 2.6W Stereo Audio Power Amplifiers and DirectDrive Headphone Amplifiers

19-3006; Rev 0; 1/04
2.6W Stereo Audio Power Amplifiers and
DirectDrive Headphone Amplifiers
General Description
The MAX9750/MAX9751/MAX9755 combine a stereo,
2.6W audio power amplifier and stereo DirectDrive
110mW headphone amplifier in a single device. The
headphone amplifier uses Maxim’s patented DirectDrive
architecture that produces a ground-referenced output
from a single supply, eliminating the need for large DC-
blocking capacitors, saving cost, space, and component
height. A high 90dB PSRR and low 0.01% THD+N
ensures clean, low-distortion amplification of the audio
signal.
The MAX9750 features an analog volume control, and a
BEEP input. The MAX9751 features a 2:1 input multiplexer,
allowing multiple audio sources to be selected. All devices
feature a single-supply voltage, a shutdown mode, logic-
selectable gain, and a headphone sense input. Industry-
leading click-and-pop suppression eliminates audible
transients during power and shutdown cycles.
The MAX9750/MAX9751/MAX9755 are offered in space-
saving, thermally efficient 28-pin thin QFN (5mm x 5mm
x 0.8mm) and 28-pin TSSOP-EP packages. Both devices
have thermal-overload and output short-circuit protec-
tion, and are specified over the extended -40°C to +85°C
temperature range.
Applications
Notebook PCs
Flat-Panel TVs
Tablet PCs
PC Displays
Portable DVD
LCD Projectors
Simplified Block Diagrams
VOL
BEEP
MAX9750
Simplifed Block Diagrams continued at end of data sheet.
Features
♦ No DC-Blocking Capacitors Required—Provides
Industry’s Most Compact Notebook Audio
Solution
♦ PC2001 Compliant
♦ 5V Single-Supply Operation
♦ Class AB 2.6W Stereo BTL Speaker Amplifiers
♦ 110mW DirectDrive Headphone Amplifiers
♦ 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
♦ Analog Volume Control (MAX9750)
♦ Beep Input with Glitch Filter (MAX9750)
♦ 2:1 Stereo Input MUX (MAX9751)
♦ ±8kV ESD-Protected Headphone Driver Outputs
♦ Available in Space-Saving, Thermally Efficient
Packages
28-Pin Thin QFN (5mm x 5mm x 0.8mm)
28-Pin TSSOP-EP
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
MAXIMUM
GAIN (dB)
MAX9750AETI*^† -40°C to +85°C 28 Thin QFN
13.5
MAX9750AEUI*^† -40°C to +85°C 28 TSSOP-EP** 13.5
MAX9750BETI*^† -40°C to +85°C 28 Thin QFN
19.5
MAX9750BEUI*^† -40°C to +85°C 28 TSSOP-EP** 19.5
MAX9750CETI^† -40°C to +85°C 28 Thin QFN
10.5
MAX9750CEUI*^† -40°C to +85°C 28 TSSOP-EP** 10.5
MAX9751ETI*^† -40°C to +85°C 28 Thin QFN
10.5
MAX9751EUI*^† -40°C to +85°C 28 TSSOP-EP** 10.5
MAX9755AETI*^† -40°C to +85°C 28 Thin QFN
10.5
MAX9755AEUI*^† -40°C to +85°C 28 TSSOP-EP** 10.5
*Future product—contact factory for availability.
**EP = Exposed Paddle.
†_{Lead-free package.}
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