The LMP91000SDE is a very low noise, low power, programmable CMOS oxygen sensor system from Texas Instruments. It is designed for medical applications and provides feedback for medical devices such as ventilators. The device can measure oxygen levels from 0.1 – 120% with a resolution of 0.1% and accuracy of ±2.5%. The LMP91000SDE has a low noise voltage supply of 1.8V, and is integrated with a dual-core Cortex-M4 ARM processor for autonomous operation. It has multiple interfaces for communication, including I2C, UART, SPI, and PWM. The device also has a temperature sensor, which makes it suitable for use in extreme temperatures.