SBAS430F January 2009 – April 2018 DAC7568 , DAC8168 , DAC8568
PRODUCTION DATA.
The internal reference is designed to exhibit minimal drift error, defined as the change in reference output voltage over varying temperature. The drift is calculated using the box method described by Equation 2:
Where:
VREF_MAX = maximum reference voltage observed within temperature range TRANGE.
VREF_MIN = minimum reference voltage observed within temperature range TRANGE.
VREF = 2.5V, target value for reference output voltage.
The internal reference (grade C only) features an exceptional typical drift coefficient of 2ppm/°C from –40°C to +125°C. Characterizing a large number of units, a maximum drift coefficient of 5ppm/°C (grade C only) is observed. Temperature drift results are summarized in the Typical Characteristics section.