diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
index 5221d46..73c7dc3 100644
--- a/.vscode/c_cpp_properties.json
+++ b/.vscode/c_cpp_properties.json
@@ -8,6 +8,7 @@
                 "${workspaceFolder}/Drivers/CMSIS/Device/ST/STM32F3xx/Include",
                 "${workspaceFolder}/Drivers/STM32F3xx_HAL_Driver/Inc",
                 "${workspaceFolder}/app/drivers/ad9833",
+                "${workspaceFolder}/app/drivers/ad5303",
                 "${workspaceFolder}/app/drivers/hw_button",
                 "${workspaceFolder}/app/drivers/led",
                 "${workspaceFolder}/app/drivers/mcp41x",
diff --git a/Makefile b/Makefile
index 81b4027..a7385eb 100644
--- a/Makefile
+++ b/Makefile
@@ -68,6 +68,7 @@ Drivers/STM32F3xx_HAL_Driver/Src/stm32f3xx_hal_uart_ex.c \
 Core/Src/system_stm32f3xx.c
 
 C_SOURCES += app/drivers/ad9833/ad9833.c
+C_SOURCES += app/drivers/ad5303/ad5303.c
 C_SOURCES += app/drivers/hw_button/hw_button.c
 C_SOURCES += app/drivers/led/led.c
 C_SOURCES += app/drivers/mcp41x/mcp41x.c
@@ -144,6 +145,7 @@ C_INCLUDES =  \
 -IDrivers/CMSIS/Include
 
 C_INCLUDES += -Iapp/drivers/ad9833
+C_INCLUDES += -Iapp/drivers/ad5303
 C_INCLUDES += -Iapp/drivers/hw_button
 C_INCLUDES += -Iapp/drivers/led
 C_INCLUDES += -Iapp/drivers/mcp41x
diff --git a/app/core/app.c b/app/core/app.c
index fefbf11..a9dfdc7 100644
--- a/app/core/app.c
+++ b/app/core/app.c
@@ -9,6 +9,7 @@
 #include "mcu_cs.h"
 #include "mcp41x.h"
 #include "ad9833.h"
+#include "ad5303.h"
 
 #define MAX_VOLT 330
 typedef enum
@@ -32,11 +33,15 @@ typedef enum
 } wave_t;
 
 st7565_handle_t hst7565;
+GFX_display_t disp;
+
 mcp41x_handle_t hmcp41;
 MCU_cs_t hmcp41_cs;
 ad9833_handle_t had9833;
 MCU_cs_t had9833_cs;
-GFX_display_t disp;
+ad5303_handle_t hdac;
+MCU_cs_t hdac_cs;
+
 uint32_t last_tick;
 option_t option;
 
@@ -70,6 +75,9 @@ void setup(void)
 	mcu_cs_init(&had9833_cs, DDS1_CS_GPIO_Port, DDS1_CS_Pin, GPIO_PIN_SET);
 	ad9833_init(&had9833, &hspi2, &had9833_cs.super);
 
+	mcu_cs_init(&hdac_cs, OFFS1_CS_GPIO_Port, OFFS1_CS_Pin, GPIO_PIN_SET);
+	ad5303_init(&hdac, &hspi2, &hdac_cs.super, AD_8BIT);
+
 	bottomButtonInit();
 
 	DISP_clearScreen(&disp);
@@ -307,11 +315,13 @@ void changeValue(int8_t inc)
 	case OFFS:
 	{
 		var[OFFS] = (var[OFFS] + inc) & UINT8_MAX;
+		ad5303_set_value(&hdac, var[OFFS], AD_DAC1);
 		break;
 	}
 	case ZERO:
 	{
 		var[ZERO] = (var[ZERO] + inc) & UINT8_MAX;
+		ad5303_set_value(&hdac, var[ZERO], AD_DAC2);
 		break;
 	}
 	default:
diff --git a/app/drivers/ad5303/ad5303.c b/app/drivers/ad5303/ad5303.c
new file mode 100644
index 0000000..a8330b1
--- /dev/null
+++ b/app/drivers/ad5303/ad5303.c
@@ -0,0 +1,81 @@
+#include "ad5303.h"
+
+void ad5303_init(ad5303_handle_t *hdac, SPI_HandleTypeDef *hspi, cs_handle_t *hcs, ad5303_res_t res)
+{
+    hdac->hspi = hspi;
+    hdac->hcs = hcs;
+    hdac->res = res;
+
+    ad5303_gain(hdac, AD_GAIN_X1);
+    ad5303_mode(hdac, AD_NORAMAL);
+    ad5303_set_value(hdac, 0, AD_DAC1);
+    ad5303_set_value(hdac, 0, AD_DAC2);
+}
+
+void ad5303_set_value(ad5303_handle_t *hdac, uint16_t value, ad5303_dac_t dac)
+{
+    uint16_t data;
+    uint8_t data8;
+    switch (dac)
+    {
+    case AD_DAC1:
+        hdac->_regCtl &= ~(1 << 15);
+        break;
+    case AD_DAC2:
+        hdac->_regCtl |= (1 << 15);
+        break;
+
+    default:
+        break;
+    }
+
+    data = hdac->_regCtl | (value << hdac->res);
+
+    hdac->hcs->cs_on(hdac->hcs);
+
+    data8 = (uint8_t)((data >> 8) & 0x00FF);
+    HAL_SPI_Transmit(hdac->hspi, &data8, 1, HAL_MAX_DELAY);
+    data8 = (uint8_t)(data & 0x00FF);
+    HAL_SPI_Transmit(hdac->hspi, &data8, 1, HAL_MAX_DELAY);
+
+    hdac->hcs->cs_off(hdac->hcs);
+}
+
+void ad5303_mode(ad5303_handle_t *hdac, ad5303_mode_t mode)
+{
+    switch (mode)
+    {
+    case AD_NORAMAL:
+        hdac->_regCtl &= ~(11 << 12);
+        break;
+    case AD_LOWZ:
+        hdac->_regCtl |= (1 << 12);
+        hdac->_regCtl &= ~(1 << 13);
+        break;
+    case AD_HIGHZ:
+        hdac->_regCtl &= ~(1 << 12);
+        hdac->_regCtl |= (1 << 13);
+        break;
+    case AD_OFF:
+        hdac->_regCtl |= (11 << 12);
+        break;
+
+    default:
+        break;
+    }
+}
+
+void ad5303_gain(ad5303_handle_t *hdac, ad5303_gain_t gain)
+{
+    switch (gain)
+    {
+    case AD_GAIN_X1:
+        hdac->_regCtl &= ~(1 << 14);
+        break;
+    case AD_GAIN_X2:
+        hdac->_regCtl |= (1 << 14);
+        break;
+    default:
+        break;
+    }
+}
diff --git a/app/drivers/ad5303/ad5303.h b/app/drivers/ad5303/ad5303.h
new file mode 100644
index 0000000..8593d95
--- /dev/null
+++ b/app/drivers/ad5303/ad5303.h
@@ -0,0 +1,44 @@
+#pragma once
+#include "inttypes.h"
+#include "spi_cs_if.h"
+#include "spi.h"
+
+typedef enum
+{
+    AD_8BIT = 4,
+    AD_10BIT = 2,
+    AD_12BIT = 0,
+} ad5303_res_t;
+
+typedef enum
+{
+    AD_DAC1,
+    AD_DAC2,
+} ad5303_dac_t;
+
+typedef enum
+{
+    AD_GAIN_X1,
+    AD_GAIN_X2,
+} ad5303_gain_t;
+
+typedef enum
+{
+    AD_NORAMAL,
+    AD_LOWZ,
+    AD_HIGHZ,
+    AD_OFF
+} ad5303_mode_t;
+
+typedef struct
+{
+    uint16_t _regCtl;
+    SPI_HandleTypeDef *hspi;
+    cs_handle_t *hcs;
+    ad5303_res_t res;
+} ad5303_handle_t;
+
+void ad5303_init(ad5303_handle_t *hdac, SPI_HandleTypeDef *hspi, cs_handle_t *hcs, ad5303_res_t res);
+void ad5303_set_value(ad5303_handle_t *hdac, uint16_t value, ad5303_dac_t dac);
+void ad5303_mode(ad5303_handle_t *hdac, ad5303_mode_t mode);
+void ad5303_gain(ad5303_handle_t *hdac, ad5303_gain_t gain);