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SIM800H bảng dữ liệu(PDF) 36 Page - SIMCom

tên linh kiện SIM800H
Giải thích chi tiết về linh kiện  Hardware Design_V2.02
PDF  73 Pages
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SIM800H bảng dữ liệu(HTML) 36 Page - SIMCom

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Table 14: Performance of audio amplifier
Conditions
Class-AB AMP
4.2V 8Ω THD+N=1%
0.87W
3.4V 8Ω THD+N=1%
0.53W
4.2V 8Ω THD+N=10%
1.08W
3.4V 8Ω THD+N=10%
0.65W
SPK2P/2N output can directly drive 8Ω speaker.
AT command “AT+CMIC” is used to adjust the input gain level of microphone. AT command “AT+SIDET”
is used to set the side-tone level. In addition, AT command “AT+CLVL” is used to adjust the output gain level.
For more details, please refer to document [1].
In order to improve audio performance, the following reference circuits are recommended. The audio signals
have to be layout according to differential signal layout rules as shown in following figures.
4.7.1.
Speaker Interfaces Configuration
Figure 31: Speaker reference circuit
4.7.2.
Microphone Interfaces Configuration
SIM800H&SIM800L_Hardware Design_V2.02
36
2015-07-27



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