Will the AD5420 performance meet the specifications under the following conditions?
External Reference 5V
( Can the External Reference be more than the digital supply? )
The AD5422 doesn’t have trim pins like the AD420 so it cannot be trimmed like the AD420. If further trimming is required, it needs to be done in the firmware. On power up the part runs an internal calibration routine, so the user doesn’t need to do any calibration, they just need to wait for 40µs after a successful power-on reset.