5V fixed reference for ADC bias and regulator rails
The REF02DSA is a 5V fixed-output series voltage reference from the REF02 family, in an 8-SOIC surface-mount package. It delivers a regulated 5V output from an input range of 8V to 30V, with a typical output current of 21 mA and a temperature coefficient of 250 ppm/°C over the 0°C to 70°C commercial range. This part is commonly used to bias the reference input of an ADC, set the regulation point of a downstream linear regulator, or provide a stable 5V rail for analog signal chains in bench instruments, office equipment, and indoor control boards.
21 mA output — how many loads it can drive
The 21 mA output current rating tells you how much total current the reference can supply to all loads on its output pin.
250 ppm/°C drift — what it means for accuracy
The 250 ppm/°C temperature coefficient means the output voltage can shift by up to 250 parts per million for every degree Celsius change in junction temperature.
Note that the part is RoHS non-compliant — it uses lead-bearing solder terminations — which may restrict its use in RoHS-mandated jurisdictions unless an exemption applies.