The BK9520 series is a chipset for wireless microphones, including transmitting chip BK9521 and receiving chip BK9522,. Each chip covers V-segment 160~270MHz and U-segment 500 and 980MHz.
Features | |
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Characteristics of launch Chip BK9521 1. Maximum transmit power: 16 dBm (V); 13 dBm (U) 2. Microphone gain adjustment range: 0~ 47.5 dB, 0.5 dB audio maximum input per step: 2 Vpp 3. Audio AGC and limited 4. GPIO indicating transmitted audio signal energy |
Receiver chip BK9522 characteristic 1. Reception sensitivity:-96 dBm (V segment);-94 dBm (U segment) 2. Audio output gain adjustment:-15 ~ 6 dB, 3 dB 3. Audio maximum output per step: 1 Vpp 4. Radio frequency AGC and AFC 5. Special GPIO indicating receiving audio signal energy 6. Special GPIO indicating receiving and receiving synchronization status 7. Dual antenna diversity, antenna automatically selecting 8. 8 segments audio equalizer 9. Active whistling circuit |
BK9521/22 common parameter package: 1. QFN 4x4 32-Pin 2. Operating voltage: 2.8~4.2V 3. Working frequency: 160~270MHz (V); 500~980MHz (U) 4. Crystal frequency: 24.576 MHz, crystal adjustment range: +/-20 ppm 5. Digital modulation: pi/4 DQPSK; bandwidth: 300KHz;Transmission rate 204.8Ksps 6. Delay: delay from microphone input to audio output is less than 3ms (48 kHz sampling rate mode, no whistling function) 7. Audio signal-to-noise ratio: 96 dB,frequency response: 30 ~ 20 KHz 8. Special data channel: 7 kbps, internal CRC check, audio and data transmission using 32-bit encrypted word |