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FAQ(AD7380): The AD7380(AD738x family) ADC has an on-chip buffered 2.5V reference. Can this internal reference be use to supply external circuitry?

The buffered 2.5V internal reference of the AD7380 is recommended to use for internal circuitry process. When this on-chip 2.5V reference is use for external circuit, it must be connected to an external buffer amplifier for example the ADA4807. The external buffer allows to provide enough current to supply the exteranl circuity without affecting the AD7380 internal activity.