DAC 不准？？？

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yogi_yi
Posts: 65
Joined: Tue May 25, 2021 11:02 am

DAC 不准？？？

Postby yogi_yi » Tue Aug 17, 2021 2:48 am

使用 ESP32-S2-Saola-1 模块
dac_output_enable(DAC_CHANNEL_1);

dac_output_voltage(DAC_CHANNEL_1, 255);
3.3V供电
IO_17脚输出电压只有3.196
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ESP_Eavo
Posts: 186
Joined: Tue Jun 08, 2021 6:23 am

Re: DAC 不准？？？

Postby ESP_Eavo » Thu Aug 19, 2021 10:05 am

请问下，是单天线还是多天线？
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yogi_yi
Posts: 65
Joined: Tue May 25, 2021 11:02 am

Re: DAC 不准？？？

Postby yogi_yi » Thu Aug 19, 2021 12:40 pm

就是那个型号的官方模块

单天线多天线是什么意思？
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yogi_yi
Posts: 65
Joined: Tue May 25, 2021 11:02 am

Re: DAC 不准？？？

Postby yogi_yi » Sat Aug 21, 2021 8:38 am

有没晓得的？
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BigBowlWhiteMeat
Posts: 1
Joined: Mon Aug 23, 2021 11:40 am

Re: DAC 不准？？？

Postby BigBowlWhiteMeat » Mon Aug 23, 2021 11:46 am

是的，由于内部压降， ESP32 的 DAC 输出 最高电平在 3.2V 左右
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yogi_yi
Posts: 65
Joined: Tue May 25, 2021 11:02 am

Re: DAC 不准？？？

Postby yogi_yi » Wed Aug 25, 2021 10:38 am

如何将内部压降考虑后，计算理论输出值？ 内部压降如何考虑到计算公式里？
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