diff --git a/docs/en/api-reference/peripherals/sdm.rst b/docs/en/api-reference/peripherals/sdm.rst
index 574e744c06..faa5bd9ddf 100644
--- a/docs/en/api-reference/peripherals/sdm.rst
+++ b/docs/en/api-reference/peripherals/sdm.rst
@@ -142,11 +142,11 @@ For example, you can take the following `Sallen-Key topology Low Pass Filter`_ a
     Sallen-Key Low Pass Filter
 
 
-Application Example
--------------------
+Application Examples
+--------------------
 
-* 100 Hz sine wave that is modulated with Sigma-Delta: :example:`peripherals/sigma_delta/sdm_dac`.
-* LED driven by a GPIO that is modulated with Sigma-Delta: :example:`peripherals/sigma_delta/sdm_led`.
+* :example:`peripherals/sigma_delta/sdm_dac` demonstrates how to use the sigma-delta driver to act as an 8-bit DAC, and output a 100 Hz sine wave.
+* :example:`peripherals/sigma_delta/sdm_led` demonstrates how to use the sigma-delta driver to control the brightness of an LED or LCD backlight.
 
 API Reference
 -------------
diff --git a/docs/zh_CN/api-reference/peripherals/sdm.rst b/docs/zh_CN/api-reference/peripherals/sdm.rst
index 60f8d5c5b6..397e995ec6 100644
--- a/docs/zh_CN/api-reference/peripherals/sdm.rst
+++ b/docs/zh_CN/api-reference/peripherals/sdm.rst
@@ -145,8 +145,8 @@ Kconfig 选项
 应用示例
 --------
 
-* 使用 Sigma-Delta 调制的 100 Hz 正弦波：:example:`peripherals/sigma_delta/sdm_dac`。
-* 使用 Sigma-Delta 调制、并由 GPIO 驱动的 LED：:example:`peripherals/sigma_delta/sdm_led`。
+* :example:`peripherals/sigma_delta/sdm_dac` 演示了如何使用 sigma-delta 驱动器作为 8 位 DAC（数字模拟转换器），并输出 100 Hz 的正弦波。
+* :example:`peripherals/sigma_delta/sdm_led` 演示了如何使用 sigma-delta 驱动器来控制 LED 或 LCD 背光的亮度。
 
 API 参考
 --------