TMP4718
- Supply range: 1.62 V to 5.5 V
- Wide operating range: –40°C to 125°C
- Remote channel accuracy: 1°C
- Resolution: 0.125°C
- Local channel accuracy: 1°C
- Resolution: 1°C
- Support I 2C and SMBus interface
- Low power consumption
- Remote diode fault detection
- Programmable digital filter
- Series resistance cancellation
- Programmable ALERT and T_CRIT limits
- Fault queue for debounce
- Adjustable default power-up limits (high temperature) for ALERT and T_CRIT
- 1.2-V logic compatible input thresholds independent of supply
The TMP4718 is a high accuracy 1°C temperature sensor with one local integrated sensor and a remote temperature sensor input that can be connected to a diode-connected transistor, such as the popular MMBT3904 NPN transistor, to replace traditional thermistors or thermocouples. The remote input can also be connected to a substrate thermal transistor or diode integrated inside microprocessors, microcontrollers, or FPGAs to monitor the die temperature of the IC.
The TMP4718 supports I2C and SMBus communication with logic levels down to 0.8V regardless of main supply rail. This enables interoperability with low voltage 1.2V MCUs without needing a secondary low voltage supply. The TMP4718 includes the Series Resistance Cancellation feature to automatically eliminate temperature errors caused by series resistance of up to 1 kΩ, allowing for greater flexibility routing to thermal diodes. The programmable offset feature allows the device to report offset-adjusted temperature data based on pre-calibrated data in specific user environments. Measurements can be done automatically with programmable conversion period, or with one-shot conversion triggered by an I 2C command.
The TMP4718A and TMP4718B offer the same function but different SMBus or I 2C device addresses. This allows the system to support two sensors on the same bus.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | TMP4718 High-Accuracy Remote and Local Temperature Sensor with Pin-Programmable Alert Thresholds datasheet (Rev. A) | PDF | HTML | 2023/9/26 | ||
| 應用說明 | How to Design Alert Overtemperature and Undertemperature Systems | PDF | HTML | 2026/3/9 | |||
| 應用說明 | How to Read and Interpret Digital Temperature Sensor Output Data (Rev. A) | PDF | HTML | 2025/1/21 | |||
| 應用說明 | Remote Temperature Transistor Sensor Selection Guide | PDF | HTML | 2021/3/24 | |||
| 應用說明 | Optimizing Remote Diode Temperature Sensor Design (Rev. A) | 2019/12/18 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |