MAX9765/MAX9766/MAX9767 50mW Audio Amplifiers with Headphone Amp, Microphone Preamp, and Input Mux
■The MAX9765/MAX9766/MAX9767 family combines speaker, headphone, and microphone amplifiers, all in a small thin QFN package. The MAX9765 is targeted at stereo speaker playback applications and includes a stereo bridge-tied load (BTL) speaker amp, stereo headphone amp, single-ended output mic amp, input MUX, and I²C control. The MAX9766 is targeted at mono speaker playback applications and includes a mono BTL speaker amp, stereo headphone amp, differential output mic amp, input MUX, and I²C control. The MAX9767 is targeted at applications that do not require a headphone amp and includes a stereo BTL speaker amp, differential output mic amp, and parallel control.
■These devices operate from a single 2.7V to 5.5V supply. A high 95dB PSRR allows these devices to operate from noisy supplies without additional power conditioning. An ultra-low 0.003% THD+N ensures clean, low distortion amplification of the audio signal. Click-and-pop suppression eliminates audible transients on power and shut-down cycles.
■In speaker mode, the amplifiers can deliver up to 750mW of continuous average power into a 4Ω load. In headphone mode, the amplifier can deliver up to 65mWof continuous average power into a 16Ω load. The gain of the amplifiers is externally set, allowing maximum flexibility in optimizing output levels for a given load. The MAX9765/MAX9766 also feature a 2:1 input multiplexer, allowing multiple audio sources to be selected. The various functions are controlled by either an I²C-compatible (MAX9765/MAX9766) or simple parallel control interface (MAX9767).
■All devices include two low-noise microphone preamps, a differential amp for internal microphones, and a single-ended amplifier for additional external micro-phones. A microphone bias output is provided, reducing external component count.
■The MAX9765/MAX9766/MAX9767 are available in a thermally efficient 32-pin thin QFN package (5mm×5mm×0.8mm). All devices have short-circuit and thermal-overload protection (OVP) and are specified over the extended -40°C to +85°C temperature range.
●Features
■750mW BTL Stereo Speaker Amplifier
■65mW Stereo Headphone Amplifier
■2.7V to 5.5V Single-Supply Operation
■Click-and-Pop Suppression
■Low 0.003% THD+N
■Low Quiescent Current: 13mA
■Low-Power Shutdown Mode: 5μA
■MUTE Function
■Headphone Sense Input
■Stereo 2:1 Input Multiplexer
■Optional 2-Wire, I²C-Compatible, or Parallel Interface
■Small 32-Pin Thin QFN (5mm×5mm×0.8mm)Package
●Applications
■PDA Audio Systems
■Tablet PCs
■Cell Phones
■Notebooks
■Digital Cameras
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MAX9765 、 MAX9766 、 MAX9767 、 MAX9765ETJ 、 MAX9766ETJ 、 MAX9767ETJ |
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[ PDA Audio Systems ][ Tablet PCs ][ Cell Phones ][ Notebooks ][ Digital Cameras ] |
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Datasheet |
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Please see the document for details |
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TQFN-EP |
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English Chinese Chinese and English Japanese |
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3/07 |
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Rev 2 |
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19-2862 |
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858 KB |
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