Texas Instruments recommends a layout with a symmetrical, star-grounded configuration, with the op-amp inputs and outputs routed away from noise sources and high-current paths. A dedicated analog ground plane and careful component placement can also help minimize noise and parasitic effects.
To handle the high output current capability of OPA657N/250G4, ensure that the output stage is properly heatsinked, and consider adding current-limiting resistors or active current limiting circuits to prevent damage to the op-amp or external components.
Texas Instruments recommends using a combination of ceramic and electrolytic capacitors for power supply decoupling, with a minimum of 10uF of capacitance per supply pin. Place the capacitors as close as possible to the op-amp's power supply pins to minimize inductance and improve noise rejection.
To minimize noise and oscillations, use a low-noise power supply, add bypass capacitors to the op-amp's power supply pins, and ensure that the circuit layout is well-shielded and grounded. Additionally, consider adding resistors in series with the op-amp's inputs to reduce input capacitance and improve stability.
The OPA657N/250G4 is rated for operation from -40°C to +125°C, but the device's performance and reliability may degrade at extreme temperatures. Ensure that the device is operated within the recommended temperature range to maintain optimal performance and reliability.
OPA657N/250G4 datasheet
by Texas Instruments
