A good PCB layout for the THS4011CD involves keeping the input and output traces short and away from each other, using a solid ground plane, and placing decoupling capacitors close to the device. A 4-layer PCB with a dedicated power plane and a dedicated ground plane is recommended.
The choice of gain resistors depends on the desired gain and bandwidth of the amplifier. A higher gain resistor value will result in a higher gain, but may also reduce the bandwidth. TI provides a gain resistor calculator tool to help with the selection.
The maximum power dissipation of the THS4011CD 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 can be derated to 0.7W at 85°C ambient temperature.
Yes, the THS4011CD can be used as a single-ended amplifier by tying the negative input to ground and using the positive input as the signal input. However, this will reduce the common-mode rejection ratio and may affect the noise performance.
The THS4011CD has a built-in low-pass filter that can be used to filter out high-frequency noise. Additionally, external filters such as RC filters or ferrite beads can be used to further reduce noise. It's also important to ensure good PCB layout and decoupling to minimize noise coupling.
THS4011CD datasheet
by Texas Instruments
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