diff --git a/Peripheral/src/ch32v20x_adc.c b/Peripheral/src/ch32v20x_adc.c
index 4d642cf..f782679 100644
--- a/Peripheral/src/ch32v20x_adc.c
+++ b/Peripheral/src/ch32v20x_adc.c
@@ -185,6 +185,8 @@ void ADC_StructInit(ADC_InitTypeDef *ADC_InitStruct)
     ADC_InitStruct->ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
     ADC_InitStruct->ADC_DataAlign = ADC_DataAlign_Right;
     ADC_InitStruct->ADC_NbrOfChannel = 1;
+    ADC_InitStruct->ADC_OutputBuffer = DISABLE;
+    ADC_InitStruct->ADC_Pga = ADC_Pga_1;
 }
 
 /*********************************************************************