Really? Datasheet says 3CREF ≤ CINT ≤ 10CREF.Cint: .22pf and Cref: .1 microf
For us to assist you, we require a couple of things:
1) Your schematic. I'm not asking about the datasheet schematic, a schematic that you found on google, but your actual schematic. With actual component values.
2) Scope waveforms and/or DMM readings. Clearly labeled where those waveforms and readings were taken.
If you are unable to provide that information, then your only recourse is to start replacing components. One by one.
At least the 1M resistor is wrongly connected in the schematic.
Pin 3 (Iin) must be DC coupled, but you have a capacitor C2 preventing that.
Is pin 7 actually tied to pin 4? There is no connecting dot.
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