Q
What are the reference options available for the AD7961?
A
The AD7961 conversions are referred to a 5 V or 4.096 V reference voltage.
There are three options for using an external reference.
• Externally buffered reference source of 5 V applied to the REF pin.
• Externally buffered reference source of 4.096 V applied to the REF pin.
• External reference of 2.048 V applied to the REFIN pin (high impedance
input). The on-chip buffer gains this by 2 and drives the REF pin with 4.096 V.
The various options for using the above any of the above references are
controlled by the EN1 and EN0 pins. Refer to the datasheet Table 8 for further
information.