Texas Instruments recommends a layout with a symmetrical, star-ground configuration, with the op-amp inputs and outputs routed away from each other and from the power supply lines. Additionally, decoupling capacitors should be placed close to the op-amp power pins.
The gain resistors should be chosen based 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. Texas Instruments provides a gain resistor calculator tool to help with this selection.
The maximum power dissipation of OPA2652E/3K is 1.4W per channel, assuming a 25°C ambient temperature and a 4-layer PCB with 1oz copper. However, this value can be derated based on the specific operating conditions and PCB layout.
Yes, OPA2652E/3K can be used as a unity-gain buffer by connecting the output to the inverting input and using a gain resistor of 0Ω. However, this configuration may not provide the best noise performance, and a dedicated unity-gain buffer op-amp may be a better choice.
To minimize EMI and RFI, use a shielded enclosure, keep the op-amp inputs and outputs away from each other and from the power supply lines, and use decoupling capacitors and ferrite beads on the power supply lines. Additionally, consider using a common-mode choke or a shielded cable for the input signal.
OPA2652E/3K datasheet
by Texas Instruments
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