Microchip EV13N91A Evaluation Board for MCP1501 for MCP1501 [EV13N91A]; 275-4684
The Microchip evaluation board is a high precision, buffered voltage reference capable of sinking and sourcing 20 mA of current. The voltage reference is a low drift band gap based reference. The band gap uses chopper based amplifiers, effectively reducing the drift to zero.
Chopper based amplifier architecture
It improves long term drift performance