Other Parts Discussed in Thread: TLV2401
The very low current TLV2241, along with several other TI op amps include in the application information the boilerplate statement, "Use a 6.8 uF tantalum capacitor in parallel with a 0.1 uF ceramic
capacitor on each supply terminal." We were planning on using only the typical 0.1 uf capacitor close to a TLV2241 operating on 5.8 volts in a unity gain follower configuration with a 100 kOhm load, along with another 0.2 uF supply bypass within inches. We're having a difficult time understanding why another 6.8 uF tantalum (or even ceramic) capacitor would be needed, as this would not normally be considered necessary. Is there something special of different about the TLV2241, the TLV2401, and other TI op amps incorporating similar warnings that make that additional capacitance necessary?