9 Power Supply Recommendations

The LMH32404-Q1 operates on 3.3-V supplies. The VDD1 and VDD2 pins must always be driven from the same supply source and individually bypassed. Use multiple bypass capacitors in parallel, because a low power-supply source impedance must be maintained across frequency. Place the bypass capacitors as close to the supply pins as possible. Place the smallest capacitor on the same side of the PCB as the LMH32404-Q1. Placing the larger valued bypass capacitors on the same side of the PCB is preferable as well; if there are space constraints however, the capacitors can be moved to the opposite side of the PCB using multiple vias to reduce the series inductance resulting from the vias. The LMH32404-Q1 can be run on bipolar supplies by connecting pins 11 and 26 to the negative supply. The thermal pad must always be connected to the most negative supply. The digital pin threshold voltages must be appropriately level shifted as they are referred to voltages at pins 11 and 26.