BlueCore™7 Bluetooth Low-Energy Transmitter / Receiver

General Description
The BC7820 is a single-chip radio and baseband IC for Bluetooth 2.4GHz systems including EDR to 3Mbits/s. It includes an integrated FM transmitter and receiver with stereo audio input and output stages and RDS modulator/demodulator.
With the on-chip CSR Bluetooth software stack, it provides a fully compliant Bluetooth system to v2.1 + EDR of the specification for data and voice communications.

Applications
Smartphones
Low-end Cellular Handsets
High-end Cellular Handsets
Personal Media Players
PDAs

CSR designed BC7820 to reduce PCB area and the number of external components, including no requirement for an external balun, ensuring that production costs are minimised.
BC7820 includes AuriStream, offering significant power reduction over the CVSD-based system when used at both ends of the link.
It incorporates auto-calibration and BIST routines to simplify development, type approval and production test. All hardware and device firmware is fully compliant with the Bluetooth v2.1 + EDR specification (mandatory and optional features).
A wide range of coexistence features are available including basic activity and Intel WCS activity and channel signalling.
The device can support receiving or transmitting FM radio broadcasts with simultaneous use of Bluetooth voice or data connections.

Bluetooth Radio
On-chip balun (50Ω impedance in Tx and Rx modes)No external trimming is required in production
Bluetooth v2.1 + EDR specification compliant
Hardware support for dual-mode Bluetooth low energy

Bluetooth Transmitter
+10dBm RF transmit power with level control from on-chip 6-bit DAC over a dynamic range >30dB
Class 1, Class 2 and Class 3 support without need for external power amplifier or TX/RX switch

Bluetooth Receiver
Receiver sensitivity of -93dBm
Integrated channel filters
Digital demodulator for improved sensitivity and cochannel rejection
Real time digitised RSSI available on HCI interface
Fast AGC for enhanced dynamic range
Channel classification for AFH

FM Receiver
Simultaneous operation with Bluetooth
Support of US/Europe (87.5-108MHz) and Japanese (76-90MHz) 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

FM Transmitter
4.5dBm RF software-controllable transmit power
level, specifically designed to overcome global differences in regulatory limits and variations in antenna implementations
Simultaneous operation with Bluetooth
Support of US/Europe (87.5-108MHz) and Japanese (76 to 90MHz) FM bands
RDS modulator PA output stage capable of PT, PS, AF, PTY, RT, TP and TA transmissions
PCM/I2S digital audio input supported
Single-ended stereo analogue audio input