STM32L4 DFSDM为什么值在大约高1到2位中是非线性的？

任何想法为什么值在大约高 1 到 2 位中是非线性的？
对于下面的设置，它在 -17000 到 +14000 之间呈线性。将 + 输出加倍只会产生大约 +18000。这些是原始值。在我看来，这真的就像某个地方的溢出。测试输入为直流，在本例中使用 AMC3336 ti 调制器。
我在这里错过了什么？
设置：

• static void MX_DFSDM1_Init(void)
• {
•   /* USER CODE BEGIN DFSDM1_Init 0 */
•   /* USER CODE END DFSDM1_Init 0 */
•   /* USER CODE BEGIN DFSDM1_Init 1 */
•   /* USER CODE END DFSDM1_Init 1 */
•   hdfsdm1_filter0.Instance = DFSDM1_Filter0;
•   hdfsdm1_filter0.Init.RegularParam.Trigger = DFSDM_FILTER_SW_TRIGGER;
•   hdfsdm1_filter0.Init.RegularParam.FastMode = DISABLE;
•   hdfsdm1_filter0.Init.RegularParam.DmaMode = DISABLE;
•   hdfsdm1_filter0.Init.FilterParam.SincOrder = DFSDM_FILTER_SINC3_ORDER;
•   hdfsdm1_filter0.Init.FilterParam.Oversampling = 256;
•   hdfsdm1_filter0.Init.FilterParam.IntOversampling = 4;
•   if (HAL_DFSDM_FilterInit(&hdfsdm1_filter0) != HAL_OK)
•   {
•     Error_Handler();
•   }
•   hdfsdm1_channel0.Instance = DFSDM1_Channel0;
•   hdfsdm1_channel0.Init.OutputClock.Activation = ENABLE;
•   hdfsdm1_channel0.Init.OutputClock.Selection = DFSDM_CHANNEL_OUTPUT_CLOCK_SYSTEM;
•   hdfsdm1_channel0.Init.OutputClock.Divider = 12;
•   hdfsdm1_channel0.Init.Input.Multiplexer = DFSDM_CHANNEL_EXTERNAL_INPUTS;
•   hdfsdm1_channel0.Init.Input.DataPacking = DFSDM_CHANNEL_STANDARD_MODE;
•   hdfsdm1_channel0.Init.Input.Pins = DFSDM_CHANNEL_SAME_CHANNEL_PINS;
•   hdfsdm1_channel0.Init.SerialInterface.Type = DFSDM_CHANNEL_SPI_RISING;
•   hdfsdm1_channel0.Init.SerialInterface.SpiClock = DFSDM_CHANNEL_SPI_CLOCK_INTERNAL;
•   hdfsdm1_channel0.Init.Awd.FilterOrder = DFSDM_CHANNEL_SINC3_ORDER;
•   hdfsdm1_channel0.Init.Awd.Oversampling = 1;
•   hdfsdm1_channel0.Init.Offset = 0;
•   hdfsdm1_channel0.Init.RightBitShift = 11;
•   if (HAL_DFSDM_ChannelInit(&hdfsdm1_channel0) != HAL_OK)
•   {
•     Error_Handler();
•   }
•   if (HAL_DFSDM_FilterConfigRegChannel(&hdfsdm1_filter0, DFSDM_CHANNEL_0, DFSDM_CONTINUOUS_CONV_OFF) != HAL_OK)
•   {
•     Error_Handler();
•   }
•   /* USER CODE BEGIN DFSDM1_Init 2 */
•   /* USER CODE END DFSDM1_Init 2 */
• }
  

读：

• int32_t readAMC3336(uint32_t samples) {
•   int32_t value;
•   uint32_t channel = 0;
•   HAL_DFSDM_FilterRegularStart(&hdfsdm1_filter0);
•   HAL_StatusTypeDef result = HAL_DFSDM_FilterPollForRegConversion(&hdfsdm1_filter0, 10);
•   value = HAL_DFSDM_FilterGetRegularValue(&hdfsdm1_filter0, &channel);
•   return value;
• }