LMT70
- Accuracy:
- ±0.05°C (typ) or ±0.13°C (max) from 20°C to 42°C
- ±0.2°C (max) from -20°C to 90°C
- ±0.23°C (max) from 90°C to 110°C
- ±0.36°C (max) from -55°C to 150°C
- Wide Temperature Range: −55°C to 150°C
- Matching of Two Adjacent LMT70A on Tape and Reel: 0.1°C (max) at 30°C
- Very Linear Analog Temperature Sensor with Output Enable Pin
- NTC Output Slope: -5.19 mV/°C
- Output On/Off Switch with RDS on < 80 Ω
- Wide Power Supply Range: 2.0 V to 5.5 V
- Low Power Supply Current: 9.2 µA (typ)12 µA (max)
- Ultra Small 0.88 mm by 0.88 mm 4-bump WLCSP (DSBGA) Package
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The LMT70 is an ultra-small, high-precision, low-power CMOS analog temperature sensor with an output enable pin. Applications for the LMT70 include virtually any type of temperature sensing where cost-effective, high precision and low-power are required, such as Internet of Things (IoT) sensor nodes, medical thermometers, high-precision instrumentation and battery powered devices. The LMT70 is also a great replacement for RTD and precision NTC/PTC thermistors.
Its output enable pin allows multiple LMT70s to share one ADC channel, thus simplifying ADC calibration and reducing the overall system cost for precision temperature sensing. The LMT70 also has a linear and low impedance output allowing seamless interface to an off-the-shelf MCU/ADC. Dissipating less than 36µW, the LMT70 has ultra-low self-heating supporting its high-precision over a wide temperature range.
The LMT70A provides unparalleled temperature matching performance of 0.1°C (max) for two adjacent LMT70A's picked from the same tape and reel. Therefore, the LMT70A is an ideal solution for energy metering applications requiring heat transfer calculations.
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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 | LMT70, LMT70A ±0.05°C Precision Analog Temperature Sensor, RTD and Precision NTC Thermistor IC datasheet (Rev. A) | PDF | HTML | 2015/5/11 | ||
| Product overview | Ultra-Small Temperature Sensor Comparison Guide (Rev. A) | PDF | HTML | 2025/1/21 | |||
| 應用說明 | Ultra-Small, Precision Analog Temperature Sensor Measurement With ADC (Rev. A) | 2021/8/24 | ||||
| 技術文章 | How to design an infrared thermometer quickly | PDF | HTML | 2020/4/7 | |||
| 應用說明 | Temperature sensors: PCB guidelines for surface mount devices (Rev. A) | 2019/1/18 | ||||
| 應用說明 | Wearable Temp-Sensing Layout Considerations Optimized for Thermal Response (Rev. B) | 2018/10/23 | ||||
| 應用說明 | Design Considerations for Measuring Ambient Air Temperature (Rev. B) | 2018/9/10 | ||||
| 技術文章 | Real-time temperature sensing with dual-mode connectivity | PDF | HTML | 2016/11/3 | |||
| 技術文章 | Tips and tricks for human body temperature measurement with analog temperature sen | PDF | HTML | 2015/9/8 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
SNIC010 — LMT70EVM Installer v1.4.0.0
TIDA-00452 — 適用於穿戴式產品的溫度感測器參考設計
此參考設計展示了面向穿戴式裝置市場的溫度感測技術。LMT70 溫度感測器在人體溫度下具有 0.13°C 的溫度準確度，是穿戴式裝置的理想選擇。其小巧的 WCSP 封裝使其可快速加熱，放置在人體上時具有快速的熱反應時間。
TIDA-00721 — 被動式 NFC 溫度貼片參考設計
TIDA-00824 — 適合穿戴式應用的人體皮膚溫度感測參考設計
TIDA-00824 配備 LMT70 類比溫度感測器，用於測量人體皮膚溫度。此參考設計展現如何以機械方式安裝溫度感測器，以獲得最佳導熱性。此設計也將討論如何實現大於 0.1°C 準確度的訊號路徑考量。
TIDA-010019 — 溫度感測器中適用於冷接點補償參考設計的 RTD 更換
TIDA-01214 — 採用16 位元 ADC 和數位隔離器的隔離式高準確度類比輸入模組參考設計
TIDA-01576 — 具有 16 位元 1-MSPS 雙同步取樣 ADC 的高準確度類比輸入模組參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| DSBGA (YFQ) | 4 | Ultra Librarian |