Dialog Semiconductor customer support - ADC 内置并联电阻 https://support.dialog-semiconductor.com/resource-keywords/adc-%E5%86%85%E7%BD%AE%E5%B9%B6%E8%81%94%E7%94%B5%E9%98%BB en ADC采样基于3.6V参考电压，芯片内部是否内置了300K欧姆的电阻？能否去掉？ https://support.dialog-semiconductor.com/forums/post/dialog-smartbond-bluetooth-low-energy-%E2%80%93-hardware-device-reference-designs/adc%E9%87%87%E6%A0%B7%E5%9F%BA%E4%BA%8E36v%E5%8F%82%E8%80%83%E7%94%B5%E5%8E%8B
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Dialog Smartbond Bluetooth Low Energy – Hardware (device & reference designs)

我们采用ADC采样一个精密电阻的电压，基于3.6V参考电压，设置了GP_ADC_ATTN3X。但是测出来的电压值和我们的理论值差别比较大。我们查手册发现Figure 55里，芯片内部是内置并联两个电阻，加起来300K欧姆。请问我们的理解是否正确？另外，这两个电阻可否取消？

Keywords: 
ADC 内置并联电阻
Device: 
DA14580
 Tue, 26 May 2020 07:09:36 +0000 MintCandy5 360664年https://support.dialog-semiconductor.com https://support.dialog-semiconductor.com/forums/post/dialog-smartbond-bluetooth-low-energy-%E2%80%93-hardware-device-reference-designs/adc%E9%87%87%E6%A0%B7%E5%9F%BA%E4%BA%8E36v%E5%8F%82%E8%80%83%E7%94%B5%E5%8E%8B#comments ADC采样基于3.6V参考电压，芯片内部是否内置了300K欧姆的电阻？能否去掉？ https://support.dialog-semiconductor.com/forums/post/dialog-smartbond-bluetooth-low-energy-%E2%80%93-software-dialog-%E2%80%9Csmartbond%E2%80%9D%E7%B3%BB%E5%88%97%E4%BD%8E%E5%8A%9F%E8%80%97%E8%93%9D%E7%89%99%E2%80%94%E8%BD%AF%E4%BB%B6-147
Forums: 
Dialog Smartbond Bluetooth Low Energy – Software // Dialog “Smartbond”系列低功耗蓝牙—软件

我们采用ADC采样一个精密电阻的电压，基于3.6V参考电压，设置了GP_ADC_ATTN3X。但是测出来的电压值和我们的理论值差别比较大。我们查手册发现Figure 55里，芯片内部是内置并联两个电阻，加起来300K欧姆。请问我们的理解是否正确？另外，这两个电阻可否取消？

Keywords: 
ADC 内置并联电阻
Device: 
DA14580
 Tue, 26 May 2020 03:01:57 +0000 MintCandy5 360630 at https://support.dialog-semiconductor.com https://support.dialog-semiconductor.com/forums/post/dialog-smartbond-bluetooth-low-energy-%E2%80%93-software-dialog-%E2%80%9Csmartbond%E2%80%9D%E7%B3%BB%E5%88%97%E4%BD%8E%E5%8A%9F%E8%80%97%E8%93%9D%E7%89%99%E2%80%94%E8%BD%AF%E4%BB%B6-147#comments