NXP LM75BDP Digital IC Temperature Sensor, TSSOP 8-Pin

The NXP LM75BDP,118 is a highly integrated digital temperature sensor and thermal watchdog. It converts temperature to a digital signal using an on-chip band gap sensor and Sigma-Delta analogue-to-digital conversion. This provides accurate monitoring with a programmable over temperature detection output, making it ideal for system thermal management.

The device features multiple data registers, including a configuration register (Conf) for setting operational parameters like device and OS operation modes, OS polarity, and fault queue. A temperature register (Temp) stores the digital temperature reading, while set-point registers (Tos and Thyst) allow you to define custom over temperature shutdown and hysteresis limits. Communication with a host controller is handled via a standard 2-wire serial I²C-bus interface.

An open-drain output (OS) activates when the programmed temperature threshold is exceeded, providing an immediate alarm function. Three selectable logic address pins enable up to eight devices to be connected on the same I²C bus without address conflicts, simplifying multi-zone temperature monitoring.

Key Features & Specifications

• I²C-bus Interface: Supports connection of up to eight devices on the same bus.
• Frequency Range: Operates from 20Hz to 400kHz and includes a bus fault time-out to prevent bus hang-ups.
• High Resolution: An 11-bit ADC provides a temperature resolution of 0.125°C.
• Programmable Set Points: User-definable temperature threshold and hysteresis limits.
• Low Power: Supply current is just 1.0μA in shutdown mode for excellent power conservation.
• Stand-alone Operation: Can function as an independent thermostat immediately at power-up.
• Robust Design: Latch-up testing exceeds 100mA per JEDEC standard JESD78.
• Digital Output: Provides a direct digital readout via I2C or SMBus interface.
• **Wx