The BK5823 is the CMOS SOC for electronic toll collection compliant with GB/T 20851.1 -2007 and GB/T 20851.2-2007, which can be used at OBU with ASK modulation and demodulation.
Full both uplink and downlink band：5.7 GHz - 5.85 GHz
Data Rate: Uplink 512 kbps/256kbps option and Downlink 256 kbps/512kbps option.
Output power: Up to 3 dBm
Sensitivity: RX: -71 dBm, wakeup: -47dBm
Fast AGC to accommodate up to 71 dB dynamic range RF input
Integrated wake-up circuit with 4.5uA sleep current.
Integrated wake-up baseband circuit to select the wakeup frequency(the frequency can be controlled).
On-chip auto calibration for wake-up base band frequency range.
ON chip low current (10uA) counter to forbid wakeup again in the setting time (1s->20s).
Receiving the 1st BST without MCU control
The sending CRC seed can auto adjust according to receiving CRC seed
On-chip temperature compensation for TX power.
2.6 V ~ 3.6 V supply
45mA TX mode current
26mA RX mode current
4-wires SPI interface up to 8 MHz
Electronic Toll Collection
5.8GHz Short Range Communication