The BK9521 is a simplified solution for the wireless microphone market, relative to the BK9521/22, which can reduce the software development link, and the hardware circuit also simplifies the development of multiple industries, but does not support a variety of complex DIY product definitions.
| Features | |
|---|---|
| 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 |
BK9521 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 |
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