I am in the process of designing board hardware using the DAC128S085 (12-bit DAC) and need some clarification regarding the voltage range for VREF1 and VREF2 in the datasheet.
On page 1, section 3 (description) of the DAC128S085 datasheet (SNAS407H-April 2015 revised), it states that each reference can be set independently between 0.5V and Va. Likewise, in table 7.3, Recommended Operating Conditions, the reference voltage, Vref1,2, over the operating free-air temperature range is specified with a minimum of 0.5V and maximum of Va.
However, in table 7.5, Electrical Characteristics, under "REFERENCE INPUT CHARACTERISTICS", the VREF1,2 input range minimum is specified as 0.5V TYP and 2.7V MIN (Tmin<Ta<Tmax).
If the device will operate over the entire operating temperature range, is the minimum reference voltage really 2.7V, or is it 0.5V? If 2.7V is the minimum over the entire temp range (Tmin<Ta<Tmax), over what temperature range can a 0.5V reference voltage be used?
Thanks,
Jamie