The LM74 is a temperature sensor, Delta-Sigma analog-to-digital converter with an SPI and MICROWIRE compatible interface. The host can query the LM74 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.
The LM74 has 12-bit plus sign temperature resolution (0.0625°C per LSB) while operating over a temperature range of −55°C to +150°C.
The LM74's 3.0V to 5.5V 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
| LM70 | LM74 | LM74A | |
| Temp Resolution (Max) (bits) | 11 | 13 | 13 |
| Supply Voltage (Min) (V) | 2.7 | 3, 4.5 | 4.5 |
| Supply Voltage (Max) (V) | 5.5 | 5.5, 3.6 | 5.5 |
| Iq (Typ) (uA) | 490 | 520 | 520 |
| Interface | SPI,Microwire | SPI,Microwire | SPI,Microwire |
| Sensor Type | Local | Local | Local |
| Local Sensor Accuracy (Max) (+/- C) | 2 | 1.25 | 3.5 |
| Pin/Package | 8QFN, 8VSSOP, 8WSON | 5DSBGA, 8SOIC | |
| Approx. Price (US$) | 0.75 | 1ku | 0.62 | 1ku | |
| Rating | Catalog | Catalog | Catalog |
| 培训内容 | 型号 | 软件/工具类型 |
| 用于硬件监控器和数字温度传感器的评估板软件 | DIGITALTEMPSENSORSEVM-SW | 应用软件 |
| 标题 | 类型 | 大小 |
| Application Note 1155 A Simple Software I2C Routine for the COP8 | 121 | |
| Tiny Temperature Sensors for Remote Systems | 369 | |
| Sensing and Monitoring for Control and Protection Seminar | 245 |