LM74A是TI公司的一款本地温度传感器产品，LM74A是具有 Microwire 和 SPI 接口的 ±3°C 芯片式温度传感器，本页介绍了LM74A的产品说明、应用、特性等，并给出了与LM74A相关的TI元器件型号供参考。
LM74A - 具有 Microwire 和 SPI 接口的 ±3°C 芯片式温度传感器 - 本地温度传感器 - 温度传感器和控制IC - TI公司（Texas Instruments，德州仪器）
The LM74A is a temperature sensor, Delta-Sigma analog-to-digital converter with an SPI and MICROWIRE compatible interface in die form. The host can query the LM74A at any time to read temperature. A shutdown mode decreases power consumption to less than 10 µA. This mode is useful in systems where low average power consumption is critical.
This particular data sheet applies to the LM74 in die form. The LM74 is available in the 8-pin SOIC package as well as an 5-Bump DSBGA package please refer to LM74 data sheet for detailed specifictions pertaining to the packaged parts.
The LM74A has 12-bit plus sign temperature resolution (0.0625°C per LSB) while operating over a temperature range of −40°C to +150°C. The LM74A-5 MDA accuracy of ±3.5°C is specified over a temperature range of 0°C to +150°C.
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DescriptionThe LM74A's 4.5V to 5.5V or 3.0V to 3.6V supply voltage range, low supply current and simple SPI interface make it ideal for a wide range of applications. These include thermal management and protection applications in hard disk drives, printers, electronic test equipment, and office electronics.
- 0.0625°C Temperature Resolution
- Shutdown Mode Conserves Power between Temperature Reading
- SPI and MICROWIRE Bus Interface
- LM74 is also Available in a 5-Bump DSBGA and 8-pin SOIC
Key Specifications
- Supply Voltage
- LM74A-5: 4.5V to 5.5V
- LM74A-3: 3.0V to 3.6V
- Supply Current
- Operating310µA (Typ)520µA (Max)
- Shutdown: 8µA (Typ)
- LM74A-5 MDA: 0°C to 140°C, ±3.0°C(Max)
- Temperature Accuracy: 140°C to 150°C, ±3.5°C(Max)
