What do the "ACCURACY (EXTERNAL RSET)" specifications mean for the current outputs of the AD5420, AD5421, AD5750 or AD5755?
The external current setting resistor (Rset) specifications assume an ideal current setting (Rset) resistor. This allows the user, in high performance applications, to select a high accuracy, low temperature drift resistor which will best match their accuracy requirements. The AD5420, AD5421, AD5750 or AD5755 also feature an internal Rset option. Here an internal current setting resistor is used and the specifications achieved using this resistor are indicated in the "ACCURACY (INTERNAL RSET)" specifications.