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BlueCore® BC7820™

BlueCore® BC7820™

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.

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

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

Subject to approval, a datasheet can be made available for this product via CSR Support.