Product Categories
Key Features
- Bluetooth v2.1 + EDR radio delivering +10dBm output and -93dBm sensitivity
- AuriStream voice CODEC providing fixed line call quality to a Bluetooth headset or reduced power consumption
- An FM radio receive with speaker drivers for direct headphone connection and short-range transmitter with audio streaming of MP3 and RDS support for track names.
- BC7820 can be used as part of a fully compliant Bluetooth v3.0+HS system
Description
CSR’s breakthrough single-chip BlueCore® BC7820™ addresses the increasing need for diverse and sophisticated wireless feature sets.
Combining Bluetooth® and FM Rx/Tx, BC7820 offers a highly-integrated embedded wireless solution. The tiny, power-efficient ROM chip strips away a host of time-consuming tasks for OEMs in managing integration and coexistence, while demonstrating superb performance. BlueCore BC7820 soundly demonstrates CSR’s leadership in embedded wireless technology.
Benefits
Supreme Bluetooth quality and range
- BC7820 boasts the world’s highest performance Bluetooth implementation, and is compatible with Bluetooth v2.1+EDR.
Integrated FM reception and transmission
- BC7820's FM implementation adds short-range FM/RDS transmission, opening up additional applications for handset manufacturers.
- The transmitter can be used to stream MP3 audio over FM to an automobile's infotainment system.
- BC7820 allows the Bluetooth and FM radios to work without interference, either independently or together, to allow users to stream FM radio from a handset to a pair of Bluetooth headphones.
- The FM receiver boasts a sensitivity of -110dBm and features inbuilt speaker drivers to allow users to connect headphones directly to the device.
Product Details
Bluetooth radio
- On-chip balun (50Ω impedance in Tx and Rx modes)
- No external trimming is required in production
- Qualified to Bluetooth v2.1 + EDR specification
Bluetooth Transmitter
- 10dBm RF transmit power with level control providing >30dB dynamic range
- Class 1, Class 2 and Class 3 support without need for external power amplifier or Tx/Rx switch
Bluetooth Receiver
- -93dBm π/4 DQPSK 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
- Channel classification for AFH
FM Transmitter
- Simultaneous operation with Bluetooth
- Support of US/Europe (87.5 to 108MHz) and Japanese (76 to 90MHz) FM bands
- 118dBμV RF software-controllable transmit power level, specifically designed to overcome global differences in regulatory limits and variations in antenna implementations
- RDS modulator PA output stage capable of PS, AF, PTY, RT, TP and TA transmissions
- PCM/I2S digital audio input supported
- Single-ended stereo analogue audio input
FM Receiver
- -108dBm sensitivity
- Simultaneous operation with Bluetooth
- Support of US/Europe (87.5 to 108MHz) and Japanese (76 to 90MHz) FM bands
- Wide dynamic range AGC
- Soft mute and stereo blend
- Adjustment-free stereo decoder and AFC
- Autonomous search tuning function (up/down) with programmability (threshold setting)
- RDS and RBDS demodulator
- Audio output available over Bluetooth audio interface or dedicated audio output
- Adaptive filter to suppress narrow band interference in the FM channel
Package Options
- 55-ball 3.2 x 3.6 x 0.6mm, 0.4mm pitch WLCSP
- 55-bump 3.2 x 3.6 x 0.35mm, 0.4mm pitch Ultrathin WLCSP
- 39-ball 3.20 x 3.55 x 0.6mm, 0.5mm pitch WLCSP
Synthesiser
- Fully integrated synthesiser requires no external VCO, varactor diode, resonator or loop filter
- Compatible with external clock 19.2 to 52MHz
Audio
- Single-ended stereo analogue audio output
- Digital audio input and output
Baseband and Software
- AuriStream (16, 24, 32, 48, 64, 80kbps) CODEC offering significant power reduction over the CVSDbased system when used at both ends of the link
- 48KB internal RAM allows full-speed data transfer, mixed voice and data, and full piconet operation, including all medium rate packet types
- Logic for forward error correction, header error control, access code correlation, CRC, demodulation, encryption bit stream generation, whitening and transmit pulse shaping. Includes support for eSCO and AFH
- Transcoders for A-law, μ-law and linear voice from host and A-law, μ-law and CVSD voice over air
Physical Interfaces
- SPI programming and debug interface
- UART interface with programmable baud rate up to 4Mbits/s
- 2 digital audio PCM/I2S interfaces (input and output)
Auxiliary Features
- Power management includes digital shutdown, and wake up commands with an integrated low power oscillator for ultra low power Park/Sniff/Hold mode
- Clock request output to control an external clock
- Device can run in low power modes from an external 32.768kHz clock signal
- Auto Baud Rate setting, depending on host interface
- On-chip linear regulators: 1.8V output from typical 2.3-4.8V input and second low dropout linear regulators producing core voltages from 1.8V
- Power-on-reset cell detects low supply voltage
- Arbitrary sequencing of power supplies is permitted
Bluetooth Stack
- CSR's Bluetooth Protocol Stack runs on the on-chip MCU in the configuration Standard HCI over UART
