diff --git a/projects/ad7405_fmc/common/ad7405_bd.tcl b/projects/ad7405_fmc/common/ad7405_bd.tcl
index 1a34960d3f..4ae006425e 100644
--- a/projects/ad7405_fmc/common/ad7405_bd.tcl
+++ b/projects/ad7405_fmc/common/ad7405_bd.tcl
@@ -19,12 +19,12 @@ ad_ip_parameter axi_ad7405_dma CONFIG.DMA_2D_TRANSFER 0
 ad_ip_parameter axi_ad7405_dma CONFIG.DMA_DATA_WIDTH_SRC 16
 ad_ip_parameter axi_ad7405_dma CONFIG.DMA_DATA_WIDTH_DEST 64
 
-# MCLK generation 50 MHz
+# MCLK generation 40 MHz
 
 ad_ip_instance axi_clkgen axi_adc_clkgen
 ad_ip_parameter axi_adc_clkgen CONFIG.VCO_DIV 1
 ad_ip_parameter axi_adc_clkgen CONFIG.VCO_MUL 10
-ad_ip_parameter axi_adc_clkgen CONFIG.CLK0_DIV 20
+ad_ip_parameter axi_adc_clkgen CONFIG.CLK0_DIV 25
 
 ad_ip_instance axi_ad7405 axi_ad7405
 
diff --git a/projects/ad7405_fmc/zed/system_constr_cmos.xdc b/projects/ad7405_fmc/zed/system_constr_cmos.xdc
index 03546ee2f2..232032102b 100644
--- a/projects/ad7405_fmc/zed/system_constr_cmos.xdc
+++ b/projects/ad7405_fmc/zed/system_constr_cmos.xdc
@@ -5,3 +5,11 @@
 
 set_property -dict {PACKAGE_PIN M19  IOSTANDARD LVCMOS25} [get_ports adc_clk]  ; ## G6  FMC_LA00_CC_P
 set_property -dict {PACKAGE_PIN M20  IOSTANDARD LVCMOS25} [get_ports adc_data] ; ## G7  FMC_LA00_CC_N
+
+set input_clock mmcm_clk_0_s
+set input_clock_period  20.000;    # Period of input clock
+set dv_bre              10.000;    # Data valid before the rising clock edge
+set dv_are              3.000
+set input_ports adc_data
+set_input_delay -clock $input_clock -max [expr $input_clock_period - $dv_bre] [get_ports $input_ports];
+set_input_delay -clock $input_clock -min $dv_are                              [get_ports $input_ports];