Shenzhen Senneng CSR8645 Bluetooth module

Product Overview The Bluetooth module is an intelligent wireless audio data transmission product independently developed by our company. It is a low-cost and high-efficiency stereo wireless transmission solution. The module uses a chip to provide the module with high-quality sound quality and compatibility, and the overall performance is better. optimization. The module adopts a driver-free method. Customers only need to connect the module to the application product to quickly realize wireless transmission of music and enjoy the fun of wireless music.
Two application areas
This module is mainly used for short-distance music transmission. It can be easily connected to Bluetooth devices of laptops, mobile phones, and other digital products to achieve wireless transmission of music.
◆Bluetooth speaker
◆Bluetooth stereo headset
◆Hands-free phone
◆Bluetooth wireless audio transmission
◆Bluetooth dialer
Three basic features
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Four performance parameters
Model
Bluetooth specifications
Modulation method
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Supply voltage
br/> Support Bluetooth protocol
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Operating current
Standby current
Temperature range
℃℃
Wireless transmission range
Sensitivity
Frequency
Frequency range
External interface
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Audio performance
Stereo Support,,
Audio signal-to-noise ratio
Distortion

Module size
Five module package size and pin definition


Six module function description


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Seven design considerations
It is a two-channel module, has audio output, and is stereo.
Notes on eight-circuit connection
When connecting an external power amplifier, it must be connected to a differential input power amplifier. If not, an op amp must be connected to balance the two differential levels, otherwise there will be popping. The impact sound.
Nine other precautions
If there are batteries, metal objects, LCD screens, speakers, etc. next to the module antenna, the distance from the antenna is required to be at least
It is recommended to use star wiring for the power supply line, and ensure that Bluetooth The power supply linearity of the module must be good, and the ground must be separated from the ground of the op amp, power amplifier, etc., and there must be no other interfering ground on the lower side.
Do not run control lines, power lines, audio lines, and other interference lines around the lines.
If there are rows of seats near the module antenna, or metal mesh on the casing that may affect the signal, it is recommended to avoid it and choose a professional high-gain antenna