公开(公告)号：US20200333814A1

公开(公告)日：2020-10-22

申请号：US16386637

申请日：2019-04-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Gautam Salil NANDI ,  Mit BHATTACHARYA

IPC: G05F1/46 ,  G05F1/575 ,  H03M1/78

Abstract: A digital-to-analog converter includes a resistor ladder, a first switch and a protection circuit. The first switch includes a first terminal and a second terminal that are respectively coupled to a rung of the resistor ladder and a reference voltage node. The protection circuit is coupled to the reference voltage node and to a reference voltage input terminal. The protection circuit includes a second switch, a third switch, and a fourth switch. First and second terminals of the second switch are respectively coupled to the reference voltage node and the reference voltage input terminal. First and second terminals of the third switch are respectively coupled to the reference voltage node and a reference voltage feedback terminal. The first and second terminals of the fourth switch are respectively coupled to the reference voltage input terminal and the reference voltage feedback terminal.