A good PCB layout for the LMH6628MA involves keeping the input and output traces short and symmetrical, using a solid ground plane, and placing the decoupling capacitors close to the device. A 4-layer PCB with a dedicated power plane and a solid ground plane is recommended.
The choice of gain resistors depends on the desired gain and bandwidth of the amplifier. A good starting point is to use the recommended values in the datasheet, and then adjust them based on the specific application requirements. It's also important to consider the resistor tolerance and temperature coefficient.
The maximum power dissipation of the LMH6628MA is dependent on the ambient temperature and the thermal resistance of the package. According to the datasheet, the maximum power dissipation is 1.4W at 25°C ambient temperature. However, this value can be derated at higher temperatures.
Yes, the LMH6628MA can be used as a unity-gain buffer. In this configuration, the gain resistors are not required, and the output is connected directly to the inverting input. However, it's essential to ensure that the input impedance is matched to the source impedance to avoid signal reflections.
The LMH6628MA has a high bandwidth, which can make it susceptible to high-frequency noise. To filter out high-frequency noise, a low-pass filter can be added at the input or output of the amplifier. The filter design depends on the specific noise frequency and amplitude.
LMH6628MA/NOPB datasheet
by Texas Instruments
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