Shenzhen Coban Electronics Co. Ltd. CB900 Manuale Utente
Figure 14: Example of Microphone implementation
4.10.2.
Speaker
The class D amplifier is capable of driving 700 mWrms into an 8 ohms load. Default switching
frequency is 600 kHz.
Pin Description
Electrical Characteristics
Application
The connections to the speaker should run in parallel to the transducer and provisions for shunt
capacitors are recommended for filtering RF and Digital Noise. Suggested values are 33 pF for
EMI. Ensure that the voltage rating of the selected components can withstand operation at the
maximum swing voltages in both directions, 16 volt parts should be sufficient. Since this feature is
exposed to the environment, provision for ESD protection is recommended.
Pin
Signal Name
Signal I/O
Description
16
SPK+
O
Speaker signal (+ve)
17
SPK-
Speaker signal (-ve)
Parameters
Min
Type
Max
Unit
Output Load Resistance
-
8
-
Ω