Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the input and output traces as short as possible. Additionally, it's recommended to use a common-mode filter capacitor between the input pins and the ground plane to reduce noise.
To ensure accurate gain setting, it's recommended to use a 1% or better tolerance resistor for the gain-setting resistors (Rg and Rf). Additionally, the gain-setting resistors should be placed close to the INA114AU to minimize parasitic capacitance and inductance.
The INA114AU can handle input voltages up to ±40V, but it's recommended to limit the input voltage to ±20V to ensure optimal performance and to prevent damage to the device.
To reduce noise and EMI, it's recommended to use a shielded enclosure, keep the input and output cables as short as possible, and use twisted-pair cables for the input signals. Additionally, adding a common-mode filter capacitor between the input pins and the ground plane can help reduce noise.
Texas Instruments recommends using a 10uF ceramic capacitor in parallel with a 100nF ceramic capacitor between the power supply pins (V+ and V-) and the ground plane to ensure stable operation and to reduce noise.
INA114AU/1KE4 datasheet
by Texas Instruments
