Overview
The LM75AD/G-T, produced by NXP USA Inc., is a digital temperature sensor and thermal watchdog that utilizes an on-chip band gap temperature sensor and Sigma-delta A-to-D conversion technique. This device is designed to provide high accuracy temperature measurements and overtemperature detection. It operates within a wide temperature range of -55°C to +125°C and is powered by a supply voltage of 2.8 V to 5.5 V. The LM75AD/G-T can be configured for various operation modes, including normal and shutdown modes, to optimize power consumption. It features an I2C-bus interface, allowing for easy communication with microcontrollers and other devices.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Temperature Range | -55°C to +125°C | °C |
| Supply Voltage | 2.8 V to 5.5 V | V |
| Temperature Resolution | 0.125 °C | °C |
| Accuracy | ±2 °C (-25 °C to +100 °C), ±3 °C (-55 °C to +125 °C) | °C |
| Supply Current (Normal Mode) | 250 µA (typ), 1 mA (max) | µA |
| Supply Current (Shutdown Mode) | 4 µA (typ) | µA |
| Package Type | 8-pin SO8 and TSSOP8 | |
| Interface | I2C-bus | |
| ESD Protection | 2000 V HBM, 200 V MM, 1000 V CDM | V |
Key Features
- High temperature resolution of 0.125 °C using an 11-bit ADC
- Programmable temperature threshold and hysteresis set points
- Open-drain overtemperature output (OS) with selectable modes (comparator or interrupt)
- I2C-bus interface supporting up to 8 devices on the same bus
- Low power consumption with 4 µA in shutdown mode
- Stand-alone operation as a thermostat with pre-defined temperature set points
- ESD protection exceeding 2000 V HBM, 200 V MM, and 1000 V CDM
- Small 8-pin package types: SO8 and TSSOP8
Applications
- System thermal management
- Personal computers and office electronics
- Electronics equipment
- Industrial controllers
- Test equipment
Q & A
- What is the temperature range of the LM75AD/G-T? The temperature range is -55°C to +125°C.
- What is the supply voltage range for the LM75AD/G-T? The supply voltage range is 2.8 V to 5.5 V.
- What is the temperature resolution of the LM75AD/G-T? The temperature resolution is 0.125 °C.
- How accurate is the LM75AD/G-T in terms of temperature measurement? The accuracy is ±2 °C from -25 °C to +100 °C and ±3 °C from -55 °C to +125 °C.
- What interface does the LM75AD/G-T use for communication? The LM75AD/G-T uses an I2C-bus interface.
- Can multiple LM75AD/G-T devices be connected on the same bus? Yes, up to 8 devices can be connected on the same bus using three selectable logic address pins.
- What are the power consumption characteristics of the LM75AD/G-T? The device consumes 250 µA (typ) in normal mode and 4 µA (typ) in shutdown mode.
- Does the LM75AD/G-T have ESD protection? Yes, it has ESD protection exceeding 2000 V HBM, 200 V MM, and 1000 V CDM.
- What are the common applications of the LM75AD/G-T? Common applications include system thermal management, personal computers, electronics equipment, industrial controllers, and test equipment.
- Can the LM75AD/G-T operate as a stand-alone thermostat? Yes, it can operate as a stand-alone thermostat with pre-defined temperature set points at power-up.
