The LM75AD,112 is a Temperature-to-Digital Converter using an on-chip band gap temperature sensor and Sigma-delta A-to-D conversion technique. The device is also a thermal detector providing an over temperature detection output. It contains a number of data registers, configuration register (Conf) to store the device settings such as device operation mode, OS operation mode, OS polarity and OS fault queue as described in Section 7 functional description, temperature register (temp) to store the digital temp reading and set-point registers (Tos and Thyst) to store programmable over temperature shutdown and hysteresis limits, that can be communicated by a controller via the 2-wire serial I2C-bus interface. The device also includes an open-drain output (OS) which becomes active when the temperature exceeds the programmed limits. There are three selectable logic address pins so that eight devices can be connected on the same bus without address conflict.
I2C-bus Interface with up to 8 devices on same bus
11-bit ADC that offers a temperature resolution of 0.125°C
Programmable temperature threshold and hysteresis set points
Supply current of 3.5μA in shutdown mode for power conservation
Stand-alone operation as thermostat at power-up
Latch-up testing is done to JEDEC standard JESD78 that exceeds 100mA
