diff --git a/boards/common/arduino-mkr/include/periph_conf_common.h b/boards/common/arduino-mkr/include/periph_conf_common.h
index 43681cd44e..3e8e3c4d64 100644
--- a/boards/common/arduino-mkr/include/periph_conf_common.h
+++ b/boards/common/arduino-mkr/include/periph_conf_common.h
@@ -151,19 +151,13 @@ static const pwm_conf_t pwm_config[] = {
  * @name ADC configuration
  * @{
  */
-#define ADC_0_EN                           1
-#define ADC_MAX_CHANNELS                   14
-/* ADC 0 device configuration */
-#define ADC_0_DEV                          ADC
-#define ADC_0_IRQ                          ADC_IRQn
 
-/* ADC 0 Default values */
-#define ADC_0_CLK_SOURCE                   0 /* GCLK_GENERATOR_0 */
-#define ADC_0_PRESCALER                    ADC_CTRLB_PRESCALER_DIV512
+/* ADC Default values */
+#define ADC_PRESCALER                       ADC_CTRLB_PRESCALER_DIV512
 
-#define ADC_0_NEG_INPUT                    ADC_INPUTCTRL_MUXNEG_GND
-#define ADC_0_GAIN_FACTOR_DEFAULT          ADC_INPUTCTRL_GAIN_1X
-#define ADC_0_REF_DEFAULT                  ADC_REFCTRL_REFSEL_INT1V
+#define ADC_NEG_INPUT                       ADC_INPUTCTRL_MUXNEG_GND
+#define ADC_GAIN_FACTOR_DEFAULT             ADC_INPUTCTRL_GAIN_1X
+#define ADC_REF_DEFAULT                     ADC_REFCTRL_REFSEL_INT1V
 
 static const adc_conf_chan_t adc_channels[] = {
     /* port, pin, muxpos */
@@ -176,8 +170,7 @@ static const adc_conf_chan_t adc_channels[] = {
     {GPIO_PIN(PA, 7), ADC_INPUTCTRL_MUXPOS_PIN7},     /* A6 */
 };
 
-#define ADC_0_CHANNELS                     (7U)
-#define ADC_NUMOF                          ADC_0_CHANNELS
+#define ADC_NUMOF                           ARRAY_SIZE(adc_channels)
 /** @} */
 
 /**
diff --git a/boards/common/saml1x/include/periph_conf.h b/boards/common/saml1x/include/periph_conf.h
index 6650b10650..8624d78ad2 100644
--- a/boards/common/saml1x/include/periph_conf.h
+++ b/boards/common/saml1x/include/periph_conf.h
@@ -141,19 +141,19 @@ static const i2c_conf_t i2c_config[] = {
  * @name ADC Configuration
  * @{
  */
-#define ADC_NUMOF                          (1U)
 
-/* ADC 0 Default values */
-#define ADC_0_CLK_SOURCE                   0 /* GCLK_GENERATOR_0 */
-#define ADC_0_PRESCALER                    ADC_CTRLB_PRESCALER_DIV256
+/* ADC Default values */
+#define ADC_PRESCALER                       ADC_CTRLB_PRESCALER_DIV256
+
+#define ADC_NEG_INPUT                       ADC_INPUTCTRL_MUXNEG(0x18u)
+#define ADC_REF_DEFAULT                     ADC_REFCTRL_REFSEL_INTVCC2
 
 static const adc_conf_chan_t adc_channels[] = {
     /* port, pin, muxpos */
     {GPIO_PIN(PA, 10), ADC_INPUTCTRL_MUXPOS(ADC_INPUTCTRL_MUXPOS_AIN8)},
 };
 
-#define ADC_0_NEG_INPUT                    ADC_INPUTCTRL_MUXNEG(0x18u)
-#define ADC_0_REF_DEFAULT                  ADC_REFCTRL_REFSEL_INTVCC2
+#define ADC_NUMOF                           ARRAY_SIZE(adc_channels)
 /** @} */
 
 #ifdef __cplusplus
diff --git a/boards/feather-m0/include/periph_conf.h b/boards/feather-m0/include/periph_conf.h
index 7ea8c0fd1d..1c60719616 100644
--- a/boards/feather-m0/include/periph_conf.h
+++ b/boards/feather-m0/include/periph_conf.h
@@ -178,19 +178,13 @@ static const pwm_conf_t pwm_config[] = {
  * @name    ADC configuration
  * @{
  */
-#define ADC_0_EN                           1
-#define ADC_MAX_CHANNELS                   14
-/* ADC 0 device configuration */
-#define ADC_0_DEV                          ADC
-#define ADC_0_IRQ                          ADC_IRQn
 
-/* ADC 0 Default values */
-#define ADC_0_CLK_SOURCE                   0 /* GCLK_GENERATOR_0 */
-#define ADC_0_PRESCALER                    ADC_CTRLB_PRESCALER_DIV512
+/* ADC Default values */
+#define ADC_PRESCALER                       ADC_CTRLB_PRESCALER_DIV512
 
-#define ADC_0_NEG_INPUT                    ADC_INPUTCTRL_MUXNEG_GND
-#define ADC_0_GAIN_FACTOR_DEFAULT          ADC_INPUTCTRL_GAIN_1X
-#define ADC_0_REF_DEFAULT                  ADC_REFCTRL_REFSEL_INT1V
+#define ADC_NEG_INPUT                       ADC_INPUTCTRL_MUXNEG_GND
+#define ADC_GAIN_FACTOR_DEFAULT             ADC_INPUTCTRL_GAIN_1X
+#define ADC_REF_DEFAULT                     ADC_REFCTRL_REFSEL_INT1V
 
 static const adc_conf_chan_t adc_channels[] = {
     /* port, pin, muxpos */
@@ -203,8 +197,7 @@ static const adc_conf_chan_t adc_channels[] = {
     { GPIO_PIN(PA, 7), ADC_INPUTCTRL_MUXPOS_PIN7 },     /* A7 */
 };
 
-#define ADC_0_CHANNELS                     (7U)
-#define ADC_NUMOF                          ADC_0_CHANNELS
+#define ADC_NUMOF                           ARRAY_SIZE(adc_channels)
 /** @} */
 
 /**
diff --git a/boards/hamilton/include/periph_conf.h b/boards/hamilton/include/periph_conf.h
index 4b81db4e8c..d9f2b11810 100644
--- a/boards/hamilton/include/periph_conf.h
+++ b/boards/hamilton/include/periph_conf.h
@@ -157,19 +157,13 @@ static const tc32_conf_t timer_config[] = {
  * @name ADC Configuration
  * @{
  */
-#define ADC_0_EN                           1
-#define ADC_MAX_CHANNELS                   14
-/* ADC 0 device configuration */
-#define ADC_0_DEV                          ADC
-#define ADC_0_IRQ                          ADC_IRQn
 
-/* ADC 0 Default values */
-#define ADC_0_CLK_SOURCE                   0 /* GCLK_GENERATOR_0 */
-#define ADC_0_PRESCALER                    ADC_CTRLB_PRESCALER_DIV512
+/* ADC Default values */
+#define ADC_PRESCALER                       ADC_CTRLB_PRESCALER_DIV512
 
-#define ADC_0_NEG_INPUT                    ADC_INPUTCTRL_MUXNEG_GND
-#define ADC_0_GAIN_FACTOR_DEFAULT          ADC_INPUTCTRL_GAIN_1X
-#define ADC_0_REF_DEFAULT                  ADC_REFCTRL_REFSEL_INT1V
+#define ADC_NEG_INPUT                       ADC_INPUTCTRL_MUXNEG_GND
+#define ADC_GAIN_FACTOR_DEFAULT             ADC_INPUTCTRL_GAIN_1X
+#define ADC_REF_DEFAULT                     ADC_REFCTRL_REFSEL_INT1V
 
 static const adc_conf_chan_t adc_channels[] = {
     /* port, pin, muxpos */
@@ -178,8 +172,7 @@ static const adc_conf_chan_t adc_channels[] = {
     {GPIO_PIN(PA, 8), ADC_INPUTCTRL_MUXPOS_PIN16},
 };
 
-#define ADC_0_CHANNELS                     (3U)
-#define ADC_NUMOF                          ADC_0_CHANNELS
+#define ADC_NUMOF                           ARRAY_SIZE(adc_channels)
 /** @} */
 
 /**
diff --git a/boards/samd21-xpro/include/periph_conf.h b/boards/samd21-xpro/include/periph_conf.h
index fc6f4181ed..c7970b1275 100644
--- a/boards/samd21-xpro/include/periph_conf.h
+++ b/boards/samd21-xpro/include/periph_conf.h
@@ -303,19 +303,13 @@ static const i2c_conf_t i2c_config[] = {
  * @name ADC Configuration
  * @{
  */
-#define ADC_0_EN                           1
-#define ADC_MAX_CHANNELS                   14
-/* ADC 0 device configuration */
-#define ADC_0_DEV                          ADC
-#define ADC_0_IRQ                          ADC_IRQn
 
-/* ADC 0 Default values */
-#define ADC_0_CLK_SOURCE                   0 /* GCLK_GENERATOR_0 */
-#define ADC_0_PRESCALER                    ADC_CTRLB_PRESCALER_DIV512
+/* ADC Default values */
+#define ADC_PRESCALER                       ADC_CTRLB_PRESCALER_DIV512
 
-#define ADC_0_NEG_INPUT                    ADC_INPUTCTRL_MUXNEG_GND
-#define ADC_0_GAIN_FACTOR_DEFAULT          ADC_INPUTCTRL_GAIN_1X
-#define ADC_0_REF_DEFAULT                  ADC_REFCTRL_REFSEL_INT1V
+#define ADC_NEG_INPUT                       ADC_INPUTCTRL_MUXNEG_GND
+#define ADC_GAIN_FACTOR_DEFAULT             ADC_INPUTCTRL_GAIN_1X
+#define ADC_REF_DEFAULT                     ADC_REFCTRL_REFSEL_INT1V
 
 static const adc_conf_chan_t adc_channels[] = {
     /* port, pin, muxpos */
@@ -329,8 +323,7 @@ static const adc_conf_chan_t adc_channels[] = {
                         Move PA03 SELECT jumper to EXT3 to connect. */
 };
 
-#define ADC_0_CHANNELS                     (6U)
-#define ADC_NUMOF                          ADC_0_CHANNELS
+#define ADC_NUMOF                           ARRAY_SIZE(adc_channels)
 /** @} */
 
 #ifdef __cplusplus
diff --git a/boards/saml21-xpro/include/periph_conf.h b/boards/saml21-xpro/include/periph_conf.h
index 0bff0f1747..b64b0d7e55 100644
--- a/boards/saml21-xpro/include/periph_conf.h
+++ b/boards/saml21-xpro/include/periph_conf.h
@@ -155,11 +155,12 @@ static const i2c_conf_t i2c_config[] = {
  * @name ADC Configuration
  * @{
  */
-#define ADC_NUMOF                          (3U)
 
-/* ADC 0 Default values */
-#define ADC_0_CLK_SOURCE                   0 /* GCLK_GENERATOR_0 */
-#define ADC_0_PRESCALER                    ADC_CTRLB_PRESCALER_DIV256
+/* ADC Default values */
+#define ADC_PRESCALER                       ADC_CTRLB_PRESCALER_DIV256
+
+#define ADC_NEG_INPUT                       ADC_INPUTCTRL_MUXNEG(0x18u)
+#define ADC_REF_DEFAULT                     ADC_REFCTRL_REFSEL_INTVCC2
 
 static const adc_conf_chan_t adc_channels[] = {
     /* port, pin, muxpos */
@@ -168,8 +169,7 @@ static const adc_conf_chan_t adc_channels[] = {
     {GPIO_PIN(PA, 2), ADC_INPUTCTRL_MUXPOS(ADC_INPUTCTRL_MUXPOS_AIN0)}
 };
 
-#define ADC_0_NEG_INPUT                    ADC_INPUTCTRL_MUXNEG(0x18u)
-#define ADC_0_REF_DEFAULT                  ADC_REFCTRL_REFSEL_INTVCC2
+#define ADC_NUMOF                           ARRAY_SIZE(adc_channels)
 /** @} */
 
 #ifdef __cplusplus
diff --git a/boards/samr21-xpro/include/periph_conf.h b/boards/samr21-xpro/include/periph_conf.h
index 1690b45e66..2249ac4b2b 100644
--- a/boards/samr21-xpro/include/periph_conf.h
+++ b/boards/samr21-xpro/include/periph_conf.h
@@ -274,19 +274,13 @@ static const i2c_conf_t i2c_config[] = {
  * @name ADC Configuration
  * @{
  */
-#define ADC_0_EN                           1
-#define ADC_MAX_CHANNELS                   14
-/* ADC 0 device configuration */
-#define ADC_0_DEV                          ADC
-#define ADC_0_IRQ                          ADC_IRQn
 
-/* ADC 0 Default values */
-#define ADC_0_CLK_SOURCE                   0 /* GCLK_GENERATOR_0 */
-#define ADC_0_PRESCALER                    ADC_CTRLB_PRESCALER_DIV512
+/* ADC Default values */
+#define ADC_PRESCALER                       ADC_CTRLB_PRESCALER_DIV512
 
-#define ADC_0_NEG_INPUT                    ADC_INPUTCTRL_MUXNEG_GND
-#define ADC_0_GAIN_FACTOR_DEFAULT          ADC_INPUTCTRL_GAIN_1X
-#define ADC_0_REF_DEFAULT                  ADC_REFCTRL_REFSEL_INT1V
+#define ADC_NEG_INPUT                       ADC_INPUTCTRL_MUXNEG_GND
+#define ADC_GAIN_FACTOR_DEFAULT             ADC_INPUTCTRL_GAIN_1X
+#define ADC_REF_DEFAULT                     ADC_REFCTRL_REFSEL_INT1V
 
 static const adc_conf_chan_t adc_channels[] = {
     /* port, pin, muxpos */
@@ -294,8 +288,7 @@ static const adc_conf_chan_t adc_channels[] = {
     {GPIO_PIN(PA, 7), ADC_INPUTCTRL_MUXPOS_PIN7},      /* EXT1, pin 4 */
 };
 
-#define ADC_0_CHANNELS                     (2U)
-#define ADC_NUMOF                          ADC_0_CHANNELS
+#define ADC_NUMOF                           ARRAY_SIZE(adc_channels)
 /** @} */
 
 /**
diff --git a/boards/samr30-xpro/include/periph_conf.h b/boards/samr30-xpro/include/periph_conf.h
index fe5bcacf76..84184d11d2 100644
--- a/boards/samr30-xpro/include/periph_conf.h
+++ b/boards/samr30-xpro/include/periph_conf.h
@@ -138,11 +138,12 @@ static const i2c_conf_t i2c_config[] = {
  * @name ADC Configuration
  * @{
  */
-#define ADC_NUMOF                               (5U)
 
-/* ADC 0 Default values */
-#define ADC_0_CLK_SOURCE                        0 /* GCLK_GENERATOR_0 */
-#define ADC_0_PRESCALER                         ADC_CTRLB_PRESCALER_DIV256
+/* ADC Default values */
+#define ADC_PRESCALER                           ADC_CTRLB_PRESCALER_DIV256
+
+#define ADC_NEG_INPUT                           ADC_INPUTCTRL_MUXNEG(0x18u)
+#define ADC_REF_DEFAULT                         ADC_REFCTRL_REFSEL_INTVCC2
 
 static const adc_conf_chan_t adc_channels[] = {
     /* port, pin, muxpos */
@@ -153,8 +154,7 @@ static const adc_conf_chan_t adc_channels[] = {
     {GPIO_PIN(PA, 2), ADC_INPUTCTRL_MUXPOS(ADC_INPUTCTRL_MUXPOS_AIN0)}
 };
 
-#define ADC_0_NEG_INPUT                         ADC_INPUTCTRL_MUXNEG(0x18u)
-#define ADC_0_REF_DEFAULT                       ADC_REFCTRL_REFSEL_INTVCC2
+#define ADC_NUMOF                               ARRAY_SIZE(adc_channels)
 /** @} */
 
 #ifdef __cplusplus
diff --git a/boards/samr34-xpro/include/periph_conf.h b/boards/samr34-xpro/include/periph_conf.h
index 180a8b09a1..38caad530b 100644
--- a/boards/samr34-xpro/include/periph_conf.h
+++ b/boards/samr34-xpro/include/periph_conf.h
@@ -140,11 +140,12 @@ static const i2c_conf_t i2c_config[] = {
  * @name ADC Configuration
  * @{
  */
-#define ADC_NUMOF                               (2U)
 
 /* ADC 0 Default values */
-#define ADC_0_CLK_SOURCE                        0 /* GCLK_GENERATOR_0 */
-#define ADC_0_PRESCALER                         ADC_CTRLB_PRESCALER_DIV256
+#define ADC_PRESCALER                           ADC_CTRLB_PRESCALER_DIV256
+
+#define ADC_NEG_INPUT                           ADC_INPUTCTRL_MUXNEG(0x18u)
+#define ADC_REF_DEFAULT                         ADC_REFCTRL_REFSEL_INTVCC2
 
 static const adc_conf_chan_t adc_channels[] = {
     /* port, pin, muxpos */
@@ -152,8 +153,8 @@ static const adc_conf_chan_t adc_channels[] = {
     {GPIO_PIN(PA, 7), ADC_INPUTCTRL_MUXPOS(ADC_INPUTCTRL_MUXPOS_AIN7)}
 };
 
-#define ADC_0_NEG_INPUT                         ADC_INPUTCTRL_MUXNEG(0x18u)
-#define ADC_0_REF_DEFAULT                       ADC_REFCTRL_REFSEL_INTVCC2
+
+#define ADC_NUMOF                               ARRAY_SIZE(adc_channels)
 /** @} */
 
 #ifdef __cplusplus
diff --git a/boards/sensebox_samd21/include/periph_conf.h b/boards/sensebox_samd21/include/periph_conf.h
index e8ea3f71fb..e8440c082b 100644
--- a/boards/sensebox_samd21/include/periph_conf.h
+++ b/boards/sensebox_samd21/include/periph_conf.h
@@ -213,18 +213,13 @@ static const i2c_conf_t i2c_config[] = {
  * @name    ADC configuration
  * @{
  */
-#define ADC_0_EN                           1
-/* ADC 0 device configuration */
-#define ADC_0_DEV                          ADC
-#define ADC_0_IRQ                          ADC_IRQn
 
-/* ADC 0 Default values */
-#define ADC_0_CLK_SOURCE                   0 /* GCLK_GENERATOR_0 */
-#define ADC_0_PRESCALER                    ADC_CTRLB_PRESCALER_DIV512
+/* ADC Default values */
+#define ADC_PRESCALER                       ADC_CTRLB_PRESCALER_DIV512
 
-#define ADC_0_NEG_INPUT                    ADC_INPUTCTRL_MUXNEG_GND
-#define ADC_0_GAIN_FACTOR_DEFAULT          ADC_INPUTCTRL_GAIN_1X
-#define ADC_0_REF_DEFAULT                  ADC_REFCTRL_REFSEL_INT1V
+#define ADC_NEG_INPUT                       ADC_INPUTCTRL_MUXNEG_GND
+#define ADC_GAIN_FACTOR_DEFAULT             ADC_INPUTCTRL_GAIN_1X
+#define ADC_REF_DEFAULT                     ADC_REFCTRL_REFSEL_INT1V
 
 /* Digital pins (1 to 6) on the board can be configured as analog inputs */
 static const adc_conf_chan_t adc_channels[] = {
@@ -237,8 +232,7 @@ static const adc_conf_chan_t adc_channels[] = {
     { GPIO_PIN(PA, 2), ADC_INPUTCTRL_MUXPOS_PIN0 },     /* Digital 6 */
 };
 
-#define ADC_0_CHANNELS                     (6U)
-#define ADC_NUMOF                          ADC_0_CHANNELS
+#define ADC_NUMOF                           ARRAY_SIZE(adc_channels)
 /** @} */
 
 /**
diff --git a/boards/sodaq-explorer/include/periph_conf.h b/boards/sodaq-explorer/include/periph_conf.h
index 4976036ded..e49189e7e1 100644
--- a/boards/sodaq-explorer/include/periph_conf.h
+++ b/boards/sodaq-explorer/include/periph_conf.h
@@ -165,19 +165,13 @@ static const uart_conf_t uart_config[] = {
  * @name ADC configuration
  * @{
  */
-#define ADC_0_EN                           1
-#define ADC_MAX_CHANNELS                   17
-/* ADC 0 device configuration */
-#define ADC_0_DEV                          ADC
-#define ADC_0_IRQ                          ADC_IRQn
 
-/* ADC 0 Default values */
-#define ADC_0_CLK_SOURCE                   0 /* GCLK_GENERATOR_0 */
-#define ADC_0_PRESCALER                    ADC_CTRLB_PRESCALER_DIV512
+/* ADC Default values */
+#define ADC_PRESCALER                       ADC_CTRLB_PRESCALER_DIV512
 
-#define ADC_0_NEG_INPUT                    ADC_INPUTCTRL_MUXNEG_GND
-#define ADC_0_GAIN_FACTOR_DEFAULT          ADC_INPUTCTRL_GAIN_1X
-#define ADC_0_REF_DEFAULT                  ADC_REFCTRL_REFSEL_INT1V
+#define ADC_NEG_INPUT                       ADC_INPUTCTRL_MUXNEG_GND
+#define ADC_GAIN_FACTOR_DEFAULT             ADC_INPUTCTRL_GAIN_1X
+#define ADC_REF_DEFAULT                     ADC_REFCTRL_REFSEL_INT1V
 
 static const adc_conf_chan_t adc_channels[] = {
     /* port, pin, muxpos */
@@ -190,8 +184,7 @@ static const adc_conf_chan_t adc_channels[] = {
     {GPIO_PIN(PA, 4), ADC_INPUTCTRL_MUXPOS_PIN4},     /* A6 (temperature) */
 };
 
-#define ADC_0_CHANNELS                     (7U)
-#define ADC_NUMOF                          ADC_0_CHANNELS
+#define ADC_NUMOF                           ARRAY_SIZE(adc_channels)
 /** @} */
 
 /**
diff --git a/boards/sodaq-one/include/periph_conf.h b/boards/sodaq-one/include/periph_conf.h
index d1cbc2f8ac..9900f40cca 100644
--- a/boards/sodaq-one/include/periph_conf.h
+++ b/boards/sodaq-one/include/periph_conf.h
@@ -158,19 +158,13 @@ static const uart_conf_t uart_config[] = {
  * @name ADC configuration
  * @{
  */
-#define ADC_0_EN                           1
-#define ADC_MAX_CHANNELS                   17
-/* ADC 0 device configuration */
-#define ADC_0_DEV                          ADC
-#define ADC_0_IRQ                          ADC_IRQn
 
-/* ADC 0 Default values */
-#define ADC_0_CLK_SOURCE                   0 /* GCLK_GENERATOR_0 */
-#define ADC_0_PRESCALER                    ADC_CTRLB_PRESCALER_DIV512
+/* ADC Default values */
+#define ADC_PRESCALER                       ADC_CTRLB_PRESCALER_DIV512
 
-#define ADC_0_NEG_INPUT                    ADC_INPUTCTRL_MUXNEG_GND
-#define ADC_0_GAIN_FACTOR_DEFAULT          ADC_INPUTCTRL_GAIN_1X
-#define ADC_0_REF_DEFAULT                  ADC_REFCTRL_REFSEL_INT1V
+#define ADC_NEG_INPUT                       ADC_INPUTCTRL_MUXNEG_GND
+#define ADC_GAIN_FACTOR_DEFAULT             ADC_INPUTCTRL_GAIN_1X
+#define ADC_REF_DEFAULT                     ADC_REFCTRL_REFSEL_INT1V
 
 static const adc_conf_chan_t adc_channels[] = {
     /* port, pin, muxpos */
@@ -192,8 +186,7 @@ static const adc_conf_chan_t adc_channels[] = {
     {GPIO_PIN(PA, 5), ADC_INPUTCTRL_MUXPOS_PIN5},     /* BAT_VOLT */
 };
 
-#define ADC_0_CHANNELS                     (12)
-#define ADC_NUMOF                          ADC_0_CHANNELS
+#define ADC_NUMOF                           ARRAY_SIZE(adc_channels)
 /** @} */
 
 /**
diff --git a/boards/sodaq-sara-aff/include/periph_conf.h b/boards/sodaq-sara-aff/include/periph_conf.h
index be0396c038..f64b7412a9 100644
--- a/boards/sodaq-sara-aff/include/periph_conf.h
+++ b/boards/sodaq-sara-aff/include/periph_conf.h
@@ -160,19 +160,13 @@ static const uart_conf_t uart_config[] = {
  * @name ADC configuration
  * @{
  */
-#define ADC_0_EN                           1
-#define ADC_MAX_CHANNELS                   19
-/* ADC 0 device configuration */
-#define ADC_0_DEV                          ADC
-#define ADC_0_IRQ                          ADC_IRQn
 
-/* ADC 0 Default values */
-#define ADC_0_CLK_SOURCE                   0 /* GCLK_GENERATOR_0 */
-#define ADC_0_PRESCALER                    ADC_CTRLB_PRESCALER_DIV512
+/* ADC Default values */
+#define ADC_PRESCALER                       ADC_CTRLB_PRESCALER_DIV512
 
-#define ADC_0_NEG_INPUT                    ADC_INPUTCTRL_MUXNEG_GND
-#define ADC_0_GAIN_FACTOR_DEFAULT          ADC_INPUTCTRL_GAIN_1X
-#define ADC_0_REF_DEFAULT                  ADC_REFCTRL_REFSEL_INT1V
+#define ADC_NEG_INPUT                       ADC_INPUTCTRL_MUXNEG_GND
+#define ADC_GAIN_FACTOR_DEFAULT             ADC_INPUTCTRL_GAIN_1X
+#define ADC_REF_DEFAULT                     ADC_REFCTRL_REFSEL_INT1V
 
 static const adc_conf_chan_t adc_channels[] = {
     /* port, pin, muxpos */
@@ -189,8 +183,7 @@ static const adc_conf_chan_t adc_channels[] = {
     {GPIO_PIN(PA, 3), ADC_INPUTCTRL_MUXPOS_PIN1},     /* AREF */
 };
 
-#define ADC_0_CHANNELS                     (11)
-#define ADC_NUMOF                          ADC_0_CHANNELS
+#define ADC_NUMOF                           ARRAY_SIZE(adc_channels)
 /** @} */
 
 /**
diff --git a/cpu/sam0_common/periph/adc.c b/cpu/sam0_common/periph/adc.c
index 326921fdb9..db97790480 100644
--- a/cpu/sam0_common/periph/adc.c
+++ b/cpu/sam0_common/periph/adc.c
@@ -28,10 +28,6 @@
 #define ENABLE_DEBUG (0)
 #include "debug.h"
 
-/* ADC 0 device configuration */
-#define ADC_0_DEV                          ADC
-#define ADC_0_IRQ                          ADC_IRQn
-
 /* Prototypes */
 static bool _adc_syncing(void);
 static void _adc_poweroff(void);
@@ -52,11 +48,11 @@ static inline void _done(void)
 static bool _adc_syncing(void)
 {
 #ifdef CPU_SAMD21
-    if (ADC_0_DEV->STATUS.reg & ADC_STATUS_SYNCBUSY) {
+    if (ADC->STATUS.reg & ADC_STATUS_SYNCBUSY) {
         return true;
     }
 #else /* CPU_SAML21 */
-    if (ADC_0_DEV->SYNCBUSY.reg) {
+    if (ADC->SYNCBUSY.reg) {
         return true;
     }
 #endif
@@ -67,15 +63,15 @@ static void _adc_poweroff(void)
 {
     while (_adc_syncing()) {}
     /* Disable */
-    ADC_0_DEV->CTRLA.reg &= ~ADC_CTRLA_ENABLE;
+    ADC->CTRLA.reg &= ~ADC_CTRLA_ENABLE;
     while (_adc_syncing()) {}
     /* Disable bandgap */
 #ifdef CPU_SAMD21
-    if (ADC_0_REF_DEFAULT == ADC_REFCTRL_REFSEL_INT1V) {
+    if (ADC_REF_DEFAULT == ADC_REFCTRL_REFSEL_INT1V) {
         SYSCTRL->VREF.reg &= ~SYSCTRL_VREF_BGOUTEN;
     }
 #else /* CPU_SAML21 */
-    if (ADC_0_REF_DEFAULT == ADC_REFCTRL_REFSEL_INTREF) {
+    if (ADC_REF_DEFAULT == ADC_REFCTRL_REFSEL_INTREF) {
         SUPC->VREF.reg &= ~SUPC_VREF_VREFOE;
     }
 #endif
@@ -89,8 +85,8 @@ static int _adc_configure(adc_res_t res)
     assert((res == ADC_RES_8BIT) || (res == ADC_RES_10BIT) ||
            (res == ADC_RES_12BIT));
     _adc_poweroff();
-    if (ADC_0_DEV->CTRLA.reg & ADC_CTRLA_SWRST ||
-        ADC_0_DEV->CTRLA.reg & ADC_CTRLA_ENABLE ) {
+    if (ADC->CTRLA.reg & ADC_CTRLA_SWRST ||
+        ADC->CTRLA.reg & ADC_CTRLA_ENABLE ) {
         _done();
         DEBUG("adc: not ready\n");
         return -1;
@@ -102,21 +98,21 @@ static int _adc_configure(adc_res_t res)
     GCLK->CLKCTRL.reg = (uint32_t)(GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN_GCLK0 |
                         (GCLK_CLKCTRL_ID(ADC_GCLK_ID)));
     /* Configure CTRLB Register HERE IS THE RESOLUTION SET! */
-    ADC_0_DEV->CTRLB.reg = ADC_0_PRESCALER | res;
+    ADC->CTRLB.reg = ADC_PRESCALER | res;
     /* Load the fixed device calibration constants */
-    ADC_0_DEV->CALIB.reg =
+    ADC->CALIB.reg =
         ADC_CALIB_BIAS_CAL((*(uint32_t*)ADC_FUSES_BIASCAL_ADDR >>
                             ADC_FUSES_BIASCAL_Pos)) |
         ADC_CALIB_LINEARITY_CAL((*(uint64_t*)ADC_FUSES_LINEARITY_0_ADDR >>
                                 ADC_FUSES_LINEARITY_0_Pos));
     /* Set Voltage Reference */
-    ADC_0_DEV->REFCTRL.reg = ADC_0_REF_DEFAULT;
+    ADC->REFCTRL.reg = ADC_REF_DEFAULT;
     /* Disable all interrupts */
-    ADC_0_DEV->INTENCLR.reg = (ADC_INTENCLR_SYNCRDY) | (ADC_INTENCLR_WINMON) |
+    ADC->INTENCLR.reg = (ADC_INTENCLR_SYNCRDY) | (ADC_INTENCLR_WINMON) |
                               (ADC_INTENCLR_OVERRUN) | (ADC_INTENCLR_RESRDY);
     while (_adc_syncing()) {}
     /* Enable bandgap if VREF is internal 1V */
-    if (ADC_0_REF_DEFAULT == ADC_REFCTRL_REFSEL_INT1V) {
+    if (ADC_REF_DEFAULT == ADC_REFCTRL_REFSEL_INT1V) {
         SYSCTRL->VREF.reg |= SYSCTRL_VREF_BGOUTEN;
     }
 #else /* CPU_SAML21 */
@@ -129,27 +125,27 @@ static int _adc_configure(adc_res_t res)
     /* GCLK Setup */
     GCLK->PCHCTRL[ADC_GCLK_ID].reg = GCLK_PCHCTRL_CHEN | GCLK_PCHCTRL_GEN_GCLK0;
     /* Set Voltage Reference */
-    ADC_0_DEV->REFCTRL.reg = ADC_0_REF_DEFAULT;
+    ADC->REFCTRL.reg = ADC_REF_DEFAULT;
     /* Configure CTRLB & CTRLC Register */
-    ADC_0_DEV->CTRLB.reg = ADC_0_PRESCALER;
-    ADC_0_DEV->CTRLC.reg |= res;
+    ADC->CTRLB.reg = ADC_PRESCALER;
+    ADC->CTRLC.reg |= res;
     /* Disable all interrupts */
-    ADC_0_DEV->INTENCLR.reg = ADC_INTENCLR_WINMON | ADC_INTENCLR_OVERRUN |
+    ADC->INTENCLR.reg = ADC_INTENCLR_WINMON | ADC_INTENCLR_OVERRUN |
                               ADC_INTENCLR_RESRDY;
     /* Set default calibration from NVM */
-    ADC_0_DEV->CALIB.reg =
+    ADC->CALIB.reg =
             ADC_FUSES_BIASCOMP((*(uint32_t*)ADC_FUSES_BIASCOMP_ADDR)) >>
             ADC_CALIB_BIASCOMP_Pos |
             ADC_FUSES_BIASREFBUF((*(uint32_t*)ADC_FUSES_BIASREFBUF_ADDR) >>
             ADC_FUSES_BIASREFBUF_Pos);
     while (_adc_syncing()) {}
     /* Enable bandgap if necessary */
-    if (ADC_0_REF_DEFAULT == ADC_REFCTRL_REFSEL_INTREF) {
+    if (ADC_REF_DEFAULT == ADC_REFCTRL_REFSEL_INTREF) {
         SUPC->VREF.reg |= SUPC_VREF_VREFOE;
     }
 #endif
     /*  Enable ADC Module */
-    ADC_0_DEV->CTRLA.reg |= ADC_CTRLA_ENABLE;
+    ADC->CTRLA.reg |= ADC_CTRLA_ENABLE;
     while (_adc_syncing()) {}
     return 0;
 }
@@ -180,17 +176,17 @@ int adc_sample(adc_t line, adc_res_t res)
         return -1;
     }
 #ifdef CPU_SAMD21
-    ADC_0_DEV->INPUTCTRL.reg = ADC_0_GAIN_FACTOR_DEFAULT |
-                               adc_channels[line].muxpos | ADC_0_NEG_INPUT;
+    ADC->INPUTCTRL.reg = ADC_GAIN_FACTOR_DEFAULT |
+                         adc_channels[line].muxpos | ADC_NEG_INPUT;
 #else /* CPU_SAML21 */
-    ADC_0_DEV->INPUTCTRL.reg = adc_channels[line].muxpos | ADC_0_NEG_INPUT;
+    ADC->INPUTCTRL.reg = adc_channels[line].muxpos | ADC_NEG_INPUT;
 #endif
     while (_adc_syncing()) {}
     /* Start the conversion */
-    ADC_0_DEV->SWTRIG.reg = ADC_SWTRIG_START;
+    ADC->SWTRIG.reg = ADC_SWTRIG_START;
     /* Wait for the result */
-    while (!(ADC_0_DEV->INTFLAG.reg & ADC_INTFLAG_RESRDY)) {}
-    int result = ADC_0_DEV->RESULT.reg;
+    while (!(ADC->INTFLAG.reg & ADC_INTFLAG_RESRDY)) {}
+    int result = ADC->RESULT.reg;
     _adc_poweroff();
     _done();
     return result;