diff --git a/src/main.rs b/src/main.rs
index 9dccd77..1c56376 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -16,6 +16,7 @@ use cortex_m_rt::entry;
 use stm32f4xx_hal::{
     hal::{
         self,
+        digital::v2::OutputPin,
         watchdog::{WatchdogEnable, Watchdog},
     },
     rcc::RccExt,
@@ -100,6 +101,8 @@ fn main() -> ! {
     let mut dac1 = ad5680::Dac::new(pins.dac1_spi, pins.dac1_sync);
     dac1.set(0).unwrap();
     let mut pwm = pins.pwm;
+    let mut shdn0 = pins.shdn0;
+    let mut shdn1 = pins.shdn1;
 
     timer::setup(cp.SYST, clocks);
 
@@ -137,10 +140,14 @@ fn main() -> ! {
                     if state.pid_enabled {
                         // Forward PID output to i_set DAC
                         match channel {
-                            0 =>
-                                dac0.set(state.dac_value).unwrap(),
-                            1 =>
-                                dac1.set(state.dac_value).unwrap(),
+                            0 => {
+                                dac0.set(state.dac_value).unwrap();
+                                shdn0.set_high().unwrap();
+                            }
+                            1 => {
+                                dac1.set(state.dac_value).unwrap();
+                                shdn1.set_high().unwrap();
+                            }
                             _ =>
                                 unreachable!(),
                         }
@@ -275,8 +282,14 @@ fn main() -> ! {
                                 Command::Pwm { channel, pin: PwmPin::ISet, duty } if duty <= ad5680::MAX_VALUE => {
                                     channel_states[channel].pid_enabled = false;
                                     match channel {
-                                        0 => dac0.set(duty).unwrap(),
-                                        1 => dac1.set(duty).unwrap(),
+                                        0 => {
+                                            dac0.set(duty).unwrap();
+                                            shdn0.set_high().unwrap();
+                                        }
+                                        1 => {
+                                            dac1.set(duty).unwrap();
+                                            shdn1.set_high().unwrap();
+                                        }
                                         _ => unreachable!(),
                                     }
                                     channel_states[channel].dac_value = duty;
diff --git a/src/pins.rs b/src/pins.rs
index c984d8a..0ec039b 100644
--- a/src/pins.rs
+++ b/src/pins.rs
@@ -1,4 +1,5 @@
 use stm32f4xx_hal::{
+    hal::digital::v2::OutputPin,
     gpio::{
         AF5, Alternate,
         gpioa::*,
@@ -30,8 +31,10 @@ pub struct Pins {
     pub pwm: PwmPins,
     pub dac0_spi: Dac0Spi,
     pub dac0_sync: PE4<Output<PushPull>>,
+    pub shdn0: PE10<Output<PushPull>>,
     pub dac1_spi: Dac1Spi,
     pub dac1_sync: PF6<Output<PushPull>>,
+    pub shdn1: PE15<Output<PushPull>>,
 }
 
 impl Pins {
@@ -58,15 +61,6 @@ impl Pins {
         let adc_spi = Self::setup_spi_adc(clocks, spi2, gpiob.pb10, gpiob.pb14, gpiob.pb15);
         let adc_nss = gpiob.pb12.into_push_pull_output();
 
-        let (dac0_spi, dac0_sync) = Self::setup_dac0(
-            clocks, spi4,
-            gpioe.pe2, gpioe.pe4, gpioe.pe6
-        );
-        let (dac1_spi, dac1_sync) = Self::setup_dac1(
-            clocks, spi5,
-            gpiof.pf7, gpiof.pf6, gpiof.pf9
-        );
-
         let pwm = PwmPins::setup(
             clocks, tim1, tim3,
             gpioc.pc6, gpioc.pc7,
@@ -74,11 +68,24 @@ impl Pins {
             gpioe.pe13, gpioe.pe14
         );
 
+        let (dac0_spi, dac0_sync) = Self::setup_dac0(
+            clocks, spi4,
+            gpioe.pe2, gpioe.pe4, gpioe.pe6
+        );
+        let mut shdn0 = gpioe.pe10.into_push_pull_output();
+        let _ = shdn0.set_low();
+        let (dac1_spi, dac1_sync) = Self::setup_dac1(
+            clocks, spi5,
+            gpiof.pf7, gpiof.pf6, gpiof.pf9
+        );
+        let mut shdn1 = gpioe.pe15.into_push_pull_output();
+        let _ = shdn1.set_low();
+
         Pins {
             adc_spi, adc_nss,
             pwm,
-            dac0_spi, dac0_sync,
-            dac1_spi, dac1_sync,
+            dac0_spi, dac0_sync, shdn0,
+            dac1_spi, dac1_sync, shdn1,
         }
     }