I have a couple of suggestions that might save you some time as you build out your TC datalogger. The AD594 and 5 are two versions of the same chip, one biased for J-type and one for K-type. The K-type is slightly more linear and will stand higher temperatures.
If you are not using a split power supply, they will not read below 0 C and both are biased to read 25C at 250mv. Temperatures below 25 C will be slightly non linear because of this and that the ADC is non linear at lower voltages due to a slight offset which you will find in the board datasheet. This is addressable with a little calculus if it is a problem for you.
The AIN on the Panda must be 3.3 v or less so you can only read to 330C. My requirements were a minimum of 450C so I dump the output of the AD595 into a voltage divider before sending it to the An In pin. That is what the thermAdjust number in my code is for.
I would advise against putting any filter caps on the An In pin. It will give you a very smooth readings, but the reading will be wrong, invariably too low in my work, compared against a Handheld Atkins thermocouple meter.
The data sheet for the AD595-4 suggests that the ground to pin 1 is optional. If you are not using a split power supply I believe it is mandatory as I could not get reliable results any other way.
A 50 mfd cap as close to the Vcc of the AD595(4) as possible is also pretty much required