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This is a project for 2 way audio door phone, the features might be as listed below.' p. U6 B; C' c7 i
7 }' t7 i, G, Z6 j' J0 z1. Battery operation, hence low standby consumption is important. The RF sniffing structure must be well organized, short wake up time, low standby current.- `1 y8 p: S9 P4 l Q( x
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. t3 v& C G. ?, A/ Y2 {
3. RF media is 2.4GHz with frequency hopping, the IC selected should have the SPI interface to do the communication.5 `7 W1 M5 P( O D. e4 Z' x) s
4. The audio input will need an ADC to pick up the signal and with internal codec to compress the audio signal.( p, ]) \6 V, }5 r. q% D6 ]
5. For the audio output, the internal decode must be able to convert the signal into analog signal.
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Is there any recommendation for suitable IC for our applications?1 Z' j. _, t. o4 I4 W
0 G* y$ T2 _: }7 ]" ~regards! |
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