AD566x/4x/2x(R) -  Supply Voltages & On-chip Reference options

1)The on-chip reference is off on power up so a write is needed to enable the internal reference.

2)There are 2 reference options:

A) The 1.25V internal reference options have an output voltage range of 0V to 2.5V.

B) The 2.5V internal referece options hves an output voltage range of 0V to 5V.

Answer:

The 1.25V internal reference option will work between a supply of 2.7V to 3.6V

The 2.5V intefnal reference option will function between a supply of 4.5V to 5.5V.

Note: If the voltage supplied is less than the expected output voltage, the output voltage is clamped by the supply voltage. For example,The expected output when programming full-scale with VDD=5.5V would be ~5V if you are using the 2.5V reference option. If VDD=4.5V,the output is clamped at 4.5V.

1)The on-chip reference is off on power up so a write is needed to enable the internal reference.

2)There are 2 reference options:

A) The 1.25V internal reference options have an output voltage range of 0V to 2.5V.

B) The 2.5V internal referece options hves an output voltage range of 0V to 5V.

Answer:

The 1.25V internal reference option will work between a supply of 2.7V to 3.6V

The 2.5V intefnal reference option will function between a supply of 4.5V to 5.5V.

Note: If the voltage supplied is less than the expected output voltage, the output voltage is clamped by the supply voltage. For example,The expected output when programming full-scale with VDD=5.5V would be ~5V if you are using the 2.5V reference option. If VDD=4.5V,the output is clamped at 4.5V.