The AD590LF can operate from -55°C to +150°C, but the accuracy is specified from -40°C to +125°C.
The AD590LF does not require calibration. It is a calibrated device with an accuracy of ±1°C. However, if you need to improve the accuracy, you can perform a one-point calibration by measuring the output voltage at a known temperature and adjusting the offset accordingly.
The output impedance of the AD590LF is typically around 1 kΩ, but it can vary depending on the temperature and the output voltage. It's recommended to buffer the output with an op-amp if you need to drive a load.
Yes, the AD590LF can be used in a ratiometric configuration, where the output voltage is proportional to the supply voltage. This can be useful in applications where the supply voltage is not well-regulated.
To protect the AD590LF from EMI, use a shielded cable to connect the device to the circuit, and consider adding a ferrite bead or a common-mode choke to the output line. Additionally, use a bypass capacitor to decouple the power supply.
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