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Key Features
- Fully qualified single-chip Bluetooth v3.0 system
- Single-chip mono headset solution with advanced echo and bi-directional noise cancellation
- Support for A2DP mono music streaming
- mSBC wide band speech codec
- Support for SPI serial flash to store large multi-language voice prompts
- Echo cancellation to support low cost car speakerphones
- Packet loss concealment improves the receive path audio quality in the presence of bit and packet errors within the Bluetooth link
- Low power consumption: over 8 hours talk time from a 85mAh battery
- High-performance 6th Generation CVC 1-mic echo and bi-directional noise cancellation with selectable ultra-low power wind noise reduction feature
- Support for boost charge providing up to 240mA total charge current
- Green (RoHS compliant and no antimony or halogenated flame retardants)
Description
BC6145™ is a Bluetooth® chip for low-cost mono headsets and car speakerphones.
BC6145™ builds on BC6140™’s capability adding the latest 6th Generation CVC™ DSP algorithms, A2DP mono music streaming, mSBC wide band speech codec and support for low cost SPI serial Flash for large multi-language voice prompts.
6th Generation CVC™ comes with bi-directional noise reduction, ultra-low power wind noise reduction and an advanced speech intelligibility feature. An echo cancellation enhancement and non-linear echo cancellation feature for low-cost speakerphones and car-kits are supported.
BC6145 supports user convenience features such as audio prompts, advanced multipoint and proximity pairing and is pin compatible with BC6130™ and BC6140.
Benefits
- Boost charge (fast charge) for faster battery charging
- Ultra-low power Wind Noise Reduction
- Development kit available to support product design
- Very low power consumption with 6th Generation 1-mic CVC audio enhancements
- Superior RF performance for improved range and link reliability
- 8.5 dBm transmit power
- -91dBm receive sensitivity
Product Details
Radio
- Common TX/RX terminal simplifies external matching; eliminates external antenna switch
- No external trimming is required in production
- Bluetooth v3.0 specification compliant
Transmitter
- 8.5dBm RF transmit power with level control from on-chip 6-bit DAC over a dynamic range typically >30dB
- Class 2 and Class 3 support without the need for an external power amplifier or TX/RX switch
Receiver
- -91dBm receive sensitivity
- Integrated channel filters
- Digital demodulator for improved sensitivity and co-channel rejection
- Real time digitised RSSI available on HCI interface
- Fast AGC for enhanced dynamic range
Synthesiser
- Fully integrated synthesiser requires no external VCO, varactor diode, resonator or loop filter
- Compatible with crystals between 16 and 26MHz
Baseband and software
- Internal ROM
- 48KB of internal RAM, enables full-speed data transfer, mixed voice/data and full piconet support
- Logic for forward error correction, header error control, access code correlation, CRC, demodulation, encryption bit stream generation, whitening and transmit pulse shaping
- Transcoders for A-law, μ-law and linear voice from host and A-law, μ-law and CVSD voice over air
- Configurable mono headset ROM software to setup headset features and user interface
- Support for HFP v1.5 (including three-way calling) and HSP v1.1
- Support for Bluetooth v3.0 specification
- Proximity pairing (headset-initiated pairing)
- Packet loss concealment improves the receive path audio quality in the presence of bit and packet errors within the Bluetooth link
- Advanced Multipoint support, enabling the headset to connect to 2 mobile phones or 1 mobile phone and a VoIP dongle
- DSP based single-microphone CVC echo and noise cancellation is included in the BC6145 for effective noise cancellation
- BC6145 development kit available.
Power Consumption
- Very low power to provide long talk times
RF performance
- 8.5dBm transmit, -91dBm receive
Kalimba DSP
- Very low power Kalimba DSP coprocessor, 64MIPS, 24-bit fixed point core
- Single cycle MAC; 24 x 24-bit multiply and 56-bit accumulator
- 32-bit instruction word, dual 24-bit data memory
- 4K x 32-bit program RAM, 8K x 24-bit + 4K x 24-bit data RAM
- 64 x 32-bit program memory cache when executing from ROM
Audio codec
- 16-bit resolution mono CODEC
- ADC and DAC
- mSBC wide band speech codec
- Integrated amplifiers for driving 16Ω speakers; no need for external components
- Support for single-ended speaker termination and line output
- Integrated low-noise microphone bias
- Digital enhancements to provide side tone
Physical Interfaces
- Synchronous serial interface for system debugging
- I²C compatible interface used to communicate with an external EEPROM which contains all of the device configuration (PS Keys)
- Synchronous serial interface communicates with an external SPI flash device, which can store programmable audio prompts
- UART interface with data rates up to 3Mbits/s
Auxiliary Features
- Crystal oscillator with built-in digital trimming
- Device can run in low power modes from an external 32.768kHz clock signal
- Programmable audio prompts
- Power management includes digital shutdown, and wake up commands with an integrated low power oscillator for ultra low power Park/Sniff/Hold mode
- On-chip regulators: 1.9V output from 2.7V to 5.5V input
- On-chip high-efficiency switch-mode regulator; 1.5V output from 2.2V to 4.4V input
- Power-on-reset cell detects low supply voltage
- Arbitrary sequencing of power supplies permitted
- Battery charger with programmable current, 20mA to 150mA for lithium ion/polymer battery
- 2 LED drivers with faders
Packaging
- QFN 48-lead 7x7mm 0.5mm pitch, pin compatible with BC6130 and BC6140