Noise reduction bluetooth audio module
ALM-A01 Spec.:
| Spec Item | Range | |
| General | Dimension (mm) | 24.0 x 17.8 x 2.4 mm |
| PCB material | FR4 4 layers | |
| Soldering pin type | Stamp module for SMT | |
| Antenna | Antenna built-in | |
| Firmware memory | ROM | |
| Bluetooth | Bluetooth version | Bluetooth specification: V4.1 + EDR |
| Bluetooth chipset | BlueCore® CSR8645™ | |
| Profiles supported | A2DP/AVRCP/HFP/HSP | |
| Connectivity | Multi-link - A2DP/HFP | 2 x host devices (A2DP/HFP) or 2 x headsets |
| App connection | CSR's proximity pairing & connection | |
| NFC | External NFC module available (Optional) | |
| RF/Wireless | Frequency range | 2.402GHz to 2.483GHz |
| Transmission power | Class 2 , 0 ~ +8 dBm | |
| Sensitivity | -90dBm (typical) | |
| Wireless Range | >10m ( free space) | |
| Audio | Microphone inputs | 2 x analog mic +2 x digital mic (MEMS) |
| Line-in | Support for stereo line-in | |
| Output for speaker | Stereo differential output (upto 50mW) | |
| ADC sampling | 8 KHz ~ 48 KHz, 16-bit high-quality | |
| DAC sampling | 8 KHz ~ 96 KHz, 16-bit high-quality | |
| Codec | Hi-Fi quality stereo codec | |
| Decoder support | aptX, SBC, MP3 and AAC | |
| Music Enhancements | Configurable EQ, S3D, Volume Boost | |
| Noise/Echo reduction | CVC6.0 noise and echo reduction | |
| HSP voice | HD voice, bi-directional noise reduction | |
| Electrical | Supply Voltage - Charger | 4.75~5.75V (Recommended) |
| Supply Voltage - Battery | 4.30V (Max) | |
| Supply Voltage | 3.0V~3.7V (Recommended) | |
| Power comsumption - StandBy | ~250uA (typical) @ACL link, Sniff 500ms, LED off | |
| Power comsumption - SCO | ~11 mA (typical) @SCO link, HV3 packet | |
| Power comsumption - A2DP | ~13 mA (typical) @SBC, 48KHz sampling | |
Key Features
1. Bluetooth audio module for high-end audio products
2. High efficiency PCB antenna built in
3. Support for Hi-Fi sound quality
4. Apt-X decoder built in
5. RF transmission power level control configurable
6. Multi-band EQ tunable, S3D and Volume Boost
7. Support for voice prompt
8. Multi-languages voice prompt (optional)
9. Optional Dual-mic technology for better noise cancellation
10. Support for USB charging enumeration and Charge management
11. Multi-point connection with 2 source devices
12. Bluetooth multi-connection A2DP adapter - 1Tx/2Rx and/or 2Tx/1Rx - combined by yourself
13. Integrated verification test including functional, RF, acoustic and Bluetooth qualifications
14. Complete QA test and external lab test for Qualifications
15. Verified production line capability and quality system
Bluetooth audio module Product picture
QA Reliability test
Production Assembly Line
Factory picture
About product
This is a high-quality Bluetooth module with PCB antenna built in. The module is elaborately designed in EMI and audio configuration based on Bluetooth stereo chipset CSR8645 with CVC noise & echo cancellation and apt-X technologies, support for multi-link, smart apps connectivity, dual-mic, digital mic, wired audio features. It has excellent RF performance by fine-tuned RF match and antenna directionality.
About our company
We are an one-stop supplier with professional service in wireless audio products, both in R&D and production quality based on our management system and industrial expertise.