TMP390
- Resistor programmable temperature trip points and hysteresis options
- Resistor tolerances contribute zero error
- Hysteresis options: 5°C, 10°C and 20°C
- Separate outputs for overtemperature or undertemperature detection
- Channel A (overtemperature): +30 to +124°C, 2°C steps
- Channel B (undertemperature): –50 to +25°C, 5°C steps
- Accuracy level options (maximum at −55°C to +130°C):
- A2 Level: ±3.0°C (±1.5°C from 0°C to +70°C)
- A3 Level: ±3.5°C (±2.0°C from 0°C to +70°C)
- Ultra-low power consumption: 0.5 µA typical at 25°C
- Supply voltage: 1.62 to 5.5 V
- Open-drain outputs
- Trip test function enables in-system testing
- Available in a SOT-563 (1.60-mm × 1.20-mm), 6-pin package
The TMP390 device is part of a family of ultra-low power, dual channel, resistor programmable temperature switches that enable protection and detection of system thermal events from –50°C to 130°C. The TMP390 offers independent overtemperature (hot) and undertemperature (cold) detection . The trip temperatures (TTRIP) and thermal hysteresis (THYST) options are programmed by two E96-series resistors (1% tolerance) on the SETA and SETB pins. Channel A resistors can range from 1.05 KΩ to 909 KΩ, representing one of 48 unique values. Channel B resistors can range from 10.5 KΩ to 909 KΩ
The value of the resistor to ground on SETA input sets the TTRIP threshold of Channel A. The value of the resistor to ground on SETB input sets the TTRIP threshold of Channel B, as well as the THYST options of 5°C, or 10°C for both channels, to prevent undesired digital output switching. When the SETB input is connected to ground, Channel A operates with 20°C hysteresis. Resistors accuracy has no impact to TTRIP accuracy.
To enable customer board-level manufacturing, the TMP390 supports a trip test function where the digital outputs are activated by exercising the SETA or SETB pin.
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 | TMP390 Ultra-Small Dual-Channel 0.5-μA Resistor-Programmable Temperature Switch datasheet (Rev. A) | 2020/7/31 | |||
| 應用說明 | How to Design Alert Overtemperature and Undertemperature Systems | PDF | HTML | 2026/3/9 | |||
| Application brief | Improving System Reliability in Auto and Ind. Cameras w/ AccurateTemp. Sensing | PDF | HTML | 2022/1/3 | |||
| 應用說明 | System Optimization Through Integrated Solutions for Temp. Threshold Detection | PDF | HTML | 2021/7/13 | |||
| 證書 | TMP390EVM EU Declaration of Conformity (DoC) | 2020/4/28 | ||||
| 電子書 | E-book: An engineer’s guide to industrial robot designs | 2020/2/12 | ||||
| 技術文章 | Protect outdoor cameras from extreme weather with a temperature switch | PDF | HTML | 2020/1/13 | |||
| Application brief | Self Diagnostics and Environmental Sensing in IP Network Cameras | 2019/10/10 | ||||
| 技術文章 | Driving industrial innovation with small-size sensors | PDF | HTML | 2019/9/12 |
設計與開發
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TMP390EVM — TMP390 雙跳閘電阻器可編程溫度開關評估模組
TMP390 評估模組 (EVM) 是一款隨插即用系統，用於測試和評估 TMP390 類比溫度開關。TMP390EVM 具有可用於雙通道開關的電阻器可程式化輸入，具有熱冷跳脫設定。
EVM 可插入 USB 埠為電路板供電，也可從外部供電。
兩個通道皆可使用 TMP390 輸出端 LED 指示燈的板載按鈕進行跳脫測試，以顯示感測器何時跳脫。感測器位於可與主 PCB 電路板分離的分線板上，以進行原型設計。
TMP390EVM 不需要進行任何校準或軟體編程，因為跳脫點是由電阻器以實體方式設定，可以更換電阻器以在其他溫度閾值下進行測試。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-5X3 (DRL) | 6 | Ultra Librarian |