The maximum input voltage that can be applied to the INA155E/250 is ±25V, but it's recommended to keep it within ±20V to ensure accurate measurements and prevent damage to the device.
The gain resistor (Rg) should be chosen based on the desired gain and the input voltage range. A higher gain resistor value results in higher gain, but also increases the noise and offset voltage. TI provides a gain resistor calculator tool to help with the selection.
The INA155E/250's performance is affected by temperature, with changes in offset voltage, gain, and noise. The device is specified to operate from -40°C to 125°C, but the accuracy and linearity may degrade at extreme temperatures. It's essential to consider temperature compensation and calibration in the system design.
The INA155E/250 is suitable for high-frequency applications up to 50 kHz, but the bandwidth and noise performance may degrade at higher frequencies. For frequencies above 50 kHz, it's recommended to use a more specialized instrumentation amplifier, such as the INA165 or INA186.
To minimize noise and interference, it's essential to follow good PCB layout practices, such as separating analog and digital grounds, using a solid ground plane, and keeping the input and output traces short and shielded. TI provides a layout guide and application notes to help with the design.
INA155E/250 datasheet
by Texas Instruments
