Features: ` 750mW BTL Stereo Speaker Amplifier
` 65mW Stereo Headphone Amplifier
` 2.7V to 5.5V Single-Supply Operation
` Patented Click-and-Pop Suppression
` Low 0.003% THD+N
` Low Quiescent Current: 13mA
` Low-Power Shutdown Mode: 5A
` 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) PackageApplication·PDA Audio Systems
·Tablet PCs
·Cell Phones
·Notebooks
·Digital CamerasPinout
SpecificationsVDD to GND ...........................................................................+6V
SVDD to GND .........................................................................+6V
SVDD to VDD.........................................................................-0.3V
PVDD to VDD .......................................................................±0.3V
PGND to GND.....................................................................±0.3V
All Other Pins to GND.................................-0.3V to (VDD + 0.3V)
Output Short-Circuit Duration (to VDD or GND)..........Continuous
Continuous Input Current (into any pin except power-supply
and output pins) ...............................................................±20mA
Continuous Power Dissipation (TA = +70°C)
32-Pin Thin QFN (derate 26.3mW/°C above +70°C) ...2105.3mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°CDescriptionThe 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. Patented click-and-pop suppression eliminates audible transients on power and shutdown cycles.
In speaker mode, the amplifiers can deliver up to 750mW of continuous average power into a 4 load. In headphone mode, the amplifier can deliver up to 65mW of continuous average power into a 16 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 I2Ccompatible (MAX9765/MAX9766) or simple parallel control interface (MAX9767).
MAX9766 include two low-noise microphone preamps, a differential amp for internal microphones, and a single-ended amplifier for additional external microphones. 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.
MAX9766 Data Sheet
