I wanted to purchase an AD849x model, particularly the AD8495. I am looking for something that can measure up to 1100 C and gives an analog output. Can the AD8495 go up to this temperature with an appropriate type K thermocouple?
The AD8495 can measure up to 1100 C, just make sure to separate the thermocouple's hot junction from the AD8495 because based on the datasheet when the IC Junction temperature goes beyond 140 C the part will be damaged.
Also, make sure to operate the AD8495 within the given ambient temperature range to ensure the accuracy given on table 7.
In your case, measuring beyond these temperature range requires linearity correction algorithm since thermocouples operate nonlinearly in this region, please refer to this Application Note for more info.