SNLU284 May 2020 LMH9135
2.4 Stack-Up and Material
The LMH9135 EVM is a 56-mil, 4-layer board whose material type is Isola? 370HR. The top layer routes the power, ground, and signals to and from the device. The signal impedance is targeted at 49.9 Ω. The bottom 3 layers are ground layers.
Figure 2-6 LMH9135 EVM Stack-Up (Units in Mils)