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This is a project for 2 way audio door phone, the features might be as listed below." ?, x# O9 q' U8 P" f, w$ V
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1. Battery operation, hence low standby consumption is important. The RF sniffing structure must be well organized, short wake up time, low standby current.
* e3 E1 [" O! q7 p; `2. 2 way audio ability, it means echo cancellation ability is necessary. The IC selected would need a DSP inside or any software base library to address the echo and howling problem.
7 c' M8 m* s4 U3. RF media is 2.4GHz with frequency hopping, the IC selected should have the SPI interface to do the communication.
: \; G% d: L5 ~7 ]4. The audio input will need an ADC to pick up the signal and with internal codec to compress the audio signal.
9 ~% W8 T3 k! a8 |, y5. For the audio output, the internal decode must be able to convert the signal into analog signal. p& p& E- ]! Z9 \, r% n
. e$ W: ^) h' V& X a/ B% o) JIs there any recommendation for suitable IC for our applications?: q$ ~, _$ P# O. m0 ~4 r
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regards! |
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