A good PCB layout for the LMH6723MA involves keeping the input and output traces short and wide, 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 output filter components depends on the specific application requirements. A good starting point is to use the recommended values in the datasheet, and then adjust based on the desired frequency response and impedance matching. TI's FilterPro software can also be used to simulate and optimize the output filter design.
The maximum power dissipation of the LMH6723MA is dependent on the ambient temperature and the thermal resistance of the package. To ensure the device doesn't overheat, it's essential to provide adequate heat sinking, such as using a heat sink or a thermally conductive PCB material, and to keep the ambient temperature within the recommended range.
Yes, the LMH6723MA can be used as a voltage-controlled amplifier by applying a control voltage to the Vgain pin. The gain of the amplifier can be varied by changing the voltage on this pin. However, the control voltage range and the gain vs. control voltage curve should be carefully evaluated to ensure the desired performance.
To troubleshoot common issues with the LMH6723MA, start by checking the PCB layout and ensuring that it meets the recommended layout guidelines. Next, verify that the input and output impedances are matched, and that the power supply is stable and well-regulated. If oscillations or distortion persist, try adding additional decoupling capacitors or adjusting the output filter components.
LMH6723MA/NOPB datasheet
by Texas Instruments
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