diff --git a/src/channel.rs b/src/channel.rs
index c3e885e..3b2fb31 100644
--- a/src/channel.rs
+++ b/src/channel.rs
@@ -14,8 +14,10 @@ pub struct Channel<C: ChannelPins> {
     /// for `i_set`
     pub dac: ad5680::Dac<C::DacSpi, C::DacSync>,
     pub shdn: C::Shdn,
+    /// stm32f4 integrated adc
+    pub adc: C::Adc,
+    pub itec_pin: C::ItecPin,
     /// feedback from `dac` output
-    pub dac_loopback: C::DacLoopback,
     pub dac_loopback_pin: C::DacLoopbackPin,
 }
 
@@ -29,7 +31,8 @@ impl<C: ChannelPins> Channel<C> {
             state,
             dac,
             shdn: pins.shdn,
-            dac_loopback: pins.dac_loopback,
+            adc: pins.adc,
+            itec_pin: pins.itec_pin,
             dac_loopback_pin: pins.dac_loopback_pin,
         }
     }
diff --git a/src/channels.rs b/src/channels.rs
index 0f6c70e..18a93a5 100644
--- a/src/channels.rs
+++ b/src/channels.rs
@@ -84,15 +84,29 @@ impl Channels {
 
     pub fn read_dac_loopback(&mut self, channel: usize) -> u16 {
         match channel {
-            0 => self.channel0.dac_loopback.convert(
+            0 => self.channel0.adc.convert(
                 &self.channel0.dac_loopback_pin,
                 stm32f4xx_hal::adc::config::SampleTime::Cycles_480
             ),
-            1 => self.channel1.dac_loopback.convert(
+            1 => self.channel1.adc.convert(
                 &self.channel1.dac_loopback_pin,
                 stm32f4xx_hal::adc::config::SampleTime::Cycles_480
             ),
             _ => unreachable!(),
         }
     }
+
+    pub fn read_itec(&mut self, channel: usize) -> u16 {
+        match channel {
+            0 => self.channel0.adc.convert(
+                &self.channel0.itec_pin,
+                stm32f4xx_hal::adc::config::SampleTime::Cycles_480
+            ),
+            1 => self.channel1.adc.convert(
+                &self.channel1.itec_pin,
+                stm32f4xx_hal::adc::config::SampleTime::Cycles_480
+            ),
+            _ => unreachable!(),
+        }
+    }
 }
diff --git a/src/main.rs b/src/main.rs
index 40d94e6..ebdbc71 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -142,11 +142,18 @@ fn main() -> ! {
                                     for channel in 0..CHANNELS {
                                         if let Some(adc_data) = channels.channel_state(channel).adc_data {
                                             let dac_loopback = channels.read_dac_loopback(channel);
+                                            let itec = channels.read_itec(channel);
+                                            let dcc_u = 5.0;
+                                            let itec_u = dcc_u * (itec as f64) / (0xFFF as f64);
+                                            let tec_u = (itec_u - 1.5) / 8.0;
+                                            let tec_r = 5.0;
+                                            let tec_i = tec_u / tec_r;
                                             let state = channels.channel_state(channel);
                                             let _ = writeln!(
-                                                socket, "t={} raw{}=0x{:06X} dac_loopback=0x{:X}",
+                                                socket, "t={} raw{}=0x{:06X} dac_loopback=0x{:X} itec=0x{:X} tec={:.2}V/{:.2}A",
                                                 state.adc_time, channel, adc_data,
-                                                dac_loopback
+                                                dac_loopback, itec,
+                                                tec_u, tec_i,
                                             );
                                         }
                                     }
diff --git a/src/pins.rs b/src/pins.rs
index af43b64..169a94e 100644
--- a/src/pins.rs
+++ b/src/pins.rs
@@ -26,7 +26,8 @@ pub trait ChannelPins {
     type DacSpi: Transfer<u8>;
     type DacSync: OutputPin;
     type Shdn: OutputPin;
-    type DacLoopback;
+    type Adc;
+    type ItecPin;
     type DacLoopbackPin;
 }
 
@@ -34,7 +35,8 @@ impl ChannelPins for Channel0 {
     type DacSpi = Dac0Spi;
     type DacSync = PE4<Output<PushPull>>;
     type Shdn = PE10<Output<PushPull>>;
-    type DacLoopback = Adc<ADC1>;
+    type Adc = Adc<ADC1>;
+    type ItecPin = PA6<Analog>;
     type DacLoopbackPin = PA4<Analog>;
 }
 
@@ -42,7 +44,8 @@ impl ChannelPins for Channel1 {
     type DacSpi = Dac1Spi;
     type DacSync = PF6<Output<PushPull>>;
     type Shdn = PE15<Output<PushPull>>;
-    type DacLoopback = Adc<ADC2>;
+    type Adc = Adc<ADC2>;
+    type ItecPin = PB0<Analog>;
     type DacLoopbackPin = PA5<Analog>;
 }
 
@@ -57,7 +60,8 @@ pub struct ChannelPinSet<C: ChannelPins> {
     pub dac_spi: C::DacSpi,
     pub dac_sync: C::DacSync,
     pub shdn: C::Shdn,
-    pub dac_loopback: C::DacLoopback,
+    pub adc: C::Adc,
+    pub itec_pin: C::ItecPin,
     pub dac_loopback_pin: C::DacLoopbackPin,
 }
 
@@ -106,14 +110,16 @@ impl Pins {
         );
         let mut shdn0 = gpioe.pe10.into_push_pull_output();
         let _ = shdn0.set_low();
-        let mut dac_loopback0 = Adc::adc1(adc1, true, Default::default());
-        dac_loopback0.enable();
+        let mut adc0 = Adc::adc1(adc1, true, Default::default());
+        adc0.enable();
+        let itec0_pin = gpioa.pa6.into_analog();
         let dac_loopback0_pin = gpioa.pa4.into_analog();
         let channel0 = ChannelPinSet {
             dac_spi: dac0_spi,
             dac_sync: dac0_sync,
             shdn: shdn0,
-            dac_loopback: dac_loopback0,
+            adc: adc0,
+            itec_pin: itec0_pin,
             dac_loopback_pin: dac_loopback0_pin,
         };
 
@@ -123,14 +129,16 @@ impl Pins {
         );
         let mut shdn1 = gpioe.pe15.into_push_pull_output();
         let _ = shdn1.set_low();
-        let mut dac_loopback1 = Adc::adc2(adc2, true, Default::default());
-        dac_loopback1.enable();
+        let mut adc1 = Adc::adc2(adc2, true, Default::default());
+        adc1.enable();
+        let itec1_pin = gpiob.pb0.into_analog();
         let dac_loopback1_pin = gpioa.pa5.into_analog();
         let channel1 = ChannelPinSet {
             dac_spi: dac1_spi,
             dac_sync: dac1_sync,
             shdn: shdn1,
-            dac_loopback: dac_loopback1,
+            adc: adc1,
+            itec_pin: itec1_pin,
             dac_loopback_pin: dac_loopback1_pin,
         };