Texas Instruments Incorporated
HIGH VOLTAGE TOLERANT ANALOG-DIGITAL OUTPUT

Abstract:

An integrated circuit includes an output terminal, an analog output circuit, a digital output circuit, and a protection circuit. The analog output circuit includes an output coupled to the output terminal. The digital output circuit includes an output. The protection circuit includes a protection transistor and a comparator circuit. The protection transistor includes a first terminal coupled to the output of the digital output circuit, a second terminal coupled to the output terminal, and a control terminal. The comparator circuit includes a first input coupled to the output terminal, a second input coupled to a reference current source, and an output coupled to the control terminal of the protection transistor.