diff --git a/targets/TARGET_STM/TARGET_STM32L0/TARGET_DISCO_L053C8/PeripheralPins.c b/targets/TARGET_STM/TARGET_STM32L0/TARGET_DISCO_L053C8/PeripheralPins.c
index e6c20c585e..9b4b97d9f3 100644
--- a/targets/TARGET_STM/TARGET_STM32L0/TARGET_DISCO_L053C8/PeripheralPins.c
+++ b/targets/TARGET_STM/TARGET_STM32L0/TARGET_DISCO_L053C8/PeripheralPins.c
@@ -49,6 +49,10 @@ const PinMap PinMap_ADC[] = {
     {PA_7, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 7, 0)}, // ADC1_IN7
     {PB_0, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 8, 0)}, // ADC1_IN8
     {PB_1, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 9, 0)}, // ADC1_IN9
+    {NC,   NC,    0}
+};
+
+const PinMap PinMap_ADC_Internal[] = {
     {ADC_TEMP, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 18, 0)}, // See in analogin_api.c the correct ADC channel used
     {ADC_VREF, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 17, 0)}, // See in analogin_api.c the correct ADC channel used
     {ADC_VLCD, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 16, 0)}, // See in analogin_api.c the correct ADC channel used
diff --git a/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L011K4/PeripheralPins.c b/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L011K4/PeripheralPins.c
index ef689b48c5..47cb630d20 100644
--- a/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L011K4/PeripheralPins.c
+++ b/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L011K4/PeripheralPins.c
@@ -49,6 +49,10 @@ const PinMap PinMap_ADC[] = {
     {PA_7,  ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 7, 0)}, // ADC_IN7
     {PB_0,  ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 8, 0)}, // ADC_IN8
     {PB_1,  ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 9, 0)}, // ADC_IN9
+    {NC,   NC,    0}
+};
+
+const PinMap PinMap_ADC_Internal[] = {
     {ADC_TEMP, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 18, 0)}, // See in analogin_api.c the correct ADC channel used
     {ADC_VREF, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 17, 0)}, // See in analogin_api.c the correct ADC channel used
     {NC,   NC,    0}
diff --git a/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L031K6/PeripheralPins.c b/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L031K6/PeripheralPins.c
index c0f2d13feb..d8ffa050c8 100644
--- a/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L031K6/PeripheralPins.c
+++ b/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L031K6/PeripheralPins.c
@@ -49,6 +49,10 @@ const PinMap PinMap_ADC[] = {
     {PA_7, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 7, 0)}, // ADC1_IN7
     {PB_0, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 8, 0)}, // ADC1_IN8
     {PB_1, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 9, 0)}, // ADC1_IN9
+    {NC,   NC,    0}
+};
+
+const PinMap PinMap_ADC_Internal[] = {
     {ADC_TEMP, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 18, 0)}, // See in analogin_api.c the correct ADC channel used
     {ADC_VREF, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 17, 0)}, // See in analogin_api.c the correct ADC channel used
     {NC,   NC,    0}
diff --git a/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L053R8/PeripheralPins.c b/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L053R8/PeripheralPins.c
index 9d1bbb412e..afdfa91a33 100644
--- a/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L053R8/PeripheralPins.c
+++ b/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L053R8/PeripheralPins.c
@@ -55,6 +55,10 @@ const PinMap PinMap_ADC[] = {
     {PC_3, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 13, 0)}, // ADC1_IN13
     {PC_4, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 14, 0)}, // ADC1_IN14
     {PC_5, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 15, 0)}, // ADC1_IN15
+    {NC,   NC,    0}
+};
+
+const PinMap PinMap_ADC_Internal[] = {
     {ADC_TEMP, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 18, 0)}, // See in analogin_api.c the correct ADC channel used
     {ADC_VREF, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 17, 0)}, // See in analogin_api.c the correct ADC channel used
     {ADC_VLCD, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 16, 0)}, // See in analogin_api.c the correct ADC channel used
diff --git a/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L073RZ/PeripheralPins.c b/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L073RZ/PeripheralPins.c
index 4b0b81f9a9..1122c2b278 100644
--- a/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L073RZ/PeripheralPins.c
+++ b/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L073RZ/PeripheralPins.c
@@ -55,6 +55,10 @@ const PinMap PinMap_ADC[] = {
     {PC_3, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 13, 0)}, // ADC1_IN13
     {PC_4, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 14, 0)}, // ADC1_IN14
     {PC_5, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 15, 0)}, // ADC1_IN15
+    {NC,   NC,    0}
+};
+
+const PinMap PinMap_ADC_Internal[] = {
     {ADC_TEMP, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 18, 0)}, // See in analogin_api.c the correct ADC channel used
     {ADC_VREF, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 17, 0)}, // See in analogin_api.c the correct ADC channel used
     {ADC_VLCD, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 16, 0)}, // See in analogin_api.c the correct ADC channel used
diff --git a/targets/TARGET_STM/TARGET_STM32L0/analogin_api.c b/targets/TARGET_STM/TARGET_STM32L0/analogin_api.c
index 5bf3200d4c..00e94daf33 100644
--- a/targets/TARGET_STM/TARGET_STM32L0/analogin_api.c
+++ b/targets/TARGET_STM/TARGET_STM32L0/analogin_api.c
@@ -42,20 +42,30 @@ int adc_inited = 0;
 
 void analogin_init(analogin_t *obj, PinName pin)
 {
-    // Get the peripheral name from the pin and assign it to the object
-    obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
-    MBED_ASSERT(obj->adc != (ADCName)NC);
+    uint32_t function = (uint32_t)NC;
+    obj->adc = (ADCName)NC;
 
-    // Get the pin function and assign the used channel to the object
-    uint32_t function = pinmap_function(pin, PinMap_ADC);
-    MBED_ASSERT(function != (uint32_t)NC);
-    obj->channel = STM_PIN_CHANNEL(function);
-
-    // Configure GPIO excepted for internal channels (Temperature, Vref, Vbat, ...)
-    // ADC Internal Channels "pins" are described in PinNames.h and must have a value >= 0xF0
+    // ADC Internal Channels "pins"  (Temperature, Vref, Vbat, ...)
+    //   are described in PinNames.h and PeripheralPins.c
+    //   Pin value must be >= 0xF0
     if (pin < 0xF0) {
+        // Normal channels
+        // Get the peripheral name from the pin and assign it to the object
+        obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
+        // Get the functions (adc channel) from the pin and assign it to the object
+        function = pinmap_function(pin, PinMap_ADC);
+        // Configure GPIO
         pinmap_pinout(pin, PinMap_ADC);
+    } else {
+        // Internal channels
+        obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC_Internal);
+        function = pinmap_function(pin, PinMap_ADC_Internal);
+        // No GPIO configuration for internal channels
     }
+    MBED_ASSERT(obj->adc != (ADCName)NC);
+    MBED_ASSERT(function != (uint32_t)NC);
+
+    obj->channel = STM_PIN_CHANNEL(function);
 
     // Save pin number for the read function
     obj->pin = pin;