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SIM800L データシート(PDF) 36 Page - SIMCom

部品番号 SIM800L
部品情報  Hardware Design_V2.02
PDF  73 Pages
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メーカー  SIMCOM [SIMCom]
ホームページ  https://www.simcom.com
Logo SIMCOM - SIMCom

SIM800L データシート(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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