CSR8645 Bluetooth V4.0 Audio Amplifier Module w/ aptX

Name: CSR8645 Bluetooth V4.0 Audio Amplifier Module w/ aptX
Brand: Generic
SKU: IOWC-0181
Price: 749.00 INR
Availability: OutOfStock

₹749.00 (Inclusive of all taxes)

Out of Stock

This CSR8645-based Bluetooth V4.0 audio amplifier module provides a low-power, high-fidelity wireless audio link for embedded projects, supporting aptX, AAC, and SBC codecs for improved stereo sound quality from a 3.3-4.2V supply.

Features

CSR8645 Bluetooth V4.0 SoC with support for aptX, AAC, SBC, and MP3 audio codecs for high-quality stereo wireless streaming.
Low power operation with ≤30mA working current and <50µA standby current, ideal for battery-powered portable audio devices.
Integrated 5-band configurable EQ and stereo widening (S3D) for customizable music playback profiles (rock, pop, classical, etc.).
Comprehensive Bluetooth profiles: HFP v1.6, HSP v1.2, A2DP v1.2, and AVRCP v1.4 for hands-free calling and media control.
Onboard control keys for POWER-EN, Play/Pause, Volume +/-, and Track Previous/Next, simplifying system integration.

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Description

Based on the CSR8645 system-on-chip, this Bluetooth V4.0 audio module is engineered for intelligent wireless stereo audio transmission in compact, power-sensitive applications. It delivers a robust RF link with a Class 1/2/3 configurable transmit power up to 9dBm and a sensitivity of -80dBm, ensuring reliable connectivity over typical short-range distances exceeding 10 meters. The module operates across the global 2.4-2.480GHz ISM band and features advanced audio processing including dual-microphone far-end enhancements, noise suppression, automatic gain control, and packet loss concealment for clear voice and music playback.

The module’s architecture supports multipoint connections, allowing simultaneous HFP links to two handsets and A2DP streaming from two audio sources. Its low operating current profile and wide supply voltage range of 3.3V to 4.2V make it suitable for integration into portable speakers, wireless headphones, automotive audio adapters, and smart home sound systems. The physical interface includes dedicated pins for the six function keys, enabling direct control integration without requiring an external microcontroller for basic operations.

Key Features

High-fidelity audio support with aptX, AAC, SBC, and MP3 codecs for superior wireless sound quality.
Advanced audio processing suite including 2-mic noise suppression, wind noise reduction, and automatic volume control.
Configurable 5-band equalizer and stereo widening effects for tailored music playback across multiple genres.
Multipoint Bluetooth connectivity supporting two simultaneous HFP (hands-free) and A2DP (audio streaming) connections.
Integrated control logic for six function keys (Power, Play/Pause, Volume, Track Control) for standalone or host-controlled operation.
Low-power design with under 30mA active current and less than 50µA in standby, extending battery life in portable devices.
Wide operating temperature range from -40°C to +80°C for reliability in challenging environmental conditions.
Support for CSR's proximity pairing and programmable multi-language audio prompts for enhanced user experience.

Applications

Portable Bluetooth speakers and wireless headphone designs.
Automotive audio Bluetooth adapters and hands-free car kits.
Smart home audio systems and wireless streaming receivers.
DIY audio projects requiring high-quality wireless audio transmission.
Battery-powered IoT devices with audio feedback or streaming capabilities.

Technical Specifications

Bluetooth SoC / Version	CSR8645 / Bluetooth V4.0
Supported Profiles	HFP v1.6, HSP v1.2, A2DP v1.2, AVRCP v1.4
Frequency Range	2.4 - 2.480 GHz
RF Transmit Power	Class 1/2/3 configurable, up to 9 dBm (Max)
RF Sensitivity	-80 dBm
Supply Voltage	3.3 - 4.2 V
Operating Current	≤ 30 mA
Standby Current	< 50 µA
Audio SNR	≥ 75 dB
Supported Audio Codecs	aptX, SBC, AAC, MP3, Faststream, mSBC
Operating Temperature	-40°C to +80°C
Dimensions (L x W x H)	27 x 14 x 2 mm

Frequently Asked Questions

What is the power supply requirement for this CSR8645 module?

The module requires a DC supply voltage between 3.3V and 4.2V. A typical 3.7V Li-ion battery is perfectly suitable. Ensure your power source can provide a clean, stable voltage within this range to guarantee proper audio performance and RF stability. The operating current is under 30mA during active streaming.

How do I control the module's playback and volume functions?

The module has six dedicated control pins: POWER-EN, PLAY, VOL+, VOL-, PREV, and NEXT. You can connect these pins directly to tactile switches or drive them from a microcontroller's GPIO pins. The PLAY button handles play/pause on a short press, call answer/hang-up on a long press, and re-pairing on an extended long press, providing full media control without complex host software.

Does this module support hands-free calling (HFP)?

Yes, it fully supports the Hands-Free Profile (HFP) v1.6, including wideband speech for HD voice quality. It features dual-microphone audio enhancements, noise suppression, and automatic gain control for clear call audio. The module also supports multipoint HFP, allowing it to maintain voice connections with two mobile phones simultaneously for flexible use cases.

What audio codecs are supported for music playback?

For high-quality stereo music streaming, the module supports the aptX, AAC, SBC, and MP3 codecs via the A2DP profile. The integrated aptX decoder provides CD-like audio quality over the Bluetooth link. Additionally, a configurable 5-band equalizer and stereo widening effects allow you to tailor the sound signature for different music genres or listening preferences.