LMT70A
- 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 | SC Temp Sensors Challenge Precision RTDs and Thermistors in Build Automation (Rev. A) | 2019/5/8 |
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-00646 — 適用於暖氣費計費器的精確比對溫度感測參考設計
TIDA-00646 參考設計展示了暖氣費計費器與其他物聯網 (IoT) 應用所需的精密溫度感測技術。暖氣費計費器使用室內和暖氣機體之間的溫差,將中央供暖系統總成本的一部分分配給多個用戶。TIDA-00646 在 +20 至 +85°C 的範圍內,準確度可優於攝氏 0.5 度。設計中使用的 LMT70A CMOS 感測器可配對使用,以免除製造期間的校正需求,並降低 OEM 系統成本。此設計採用「雙感測器測量方法」,符合 EN834 標準。
TIDA-00838 — 具有 wM-Bus (868 MHz) 的暖氣費計費器參考設計
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TIDA-00848 — 使用 GPIO 針腳提高系統靈活性的分段式 LCD 控制參考設計
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| DSBGA (YFQ) | 4 | Ultra Librarian |