Analog Bits PVT Sensor is a highly integrated macro for monitoring process, voltage, and temperature variation on-chip, allowing very high precision even in untrimmed usage. It consumes very little power even in operational mode, and leakage power only when temperature measurement is complete. An additional voltage sample mode is included allowing for supply voltage monitoring, and process monitor mode to assess transistor performance. The block includes a simple-to-use digital interface that works with standard core and IO level power supplies. The macro uses core and thick-oxide devices.