TMP411 - ±1°C Remote & Local Temp Sensor | Texas Instruments
MPN： TMP411 ✓ 啟用中TMP411 概覽
A temperature sensor is a device that measures temperature and converts it into an electrical signal. The TMP411 is a digital temperature sensor, which means it outputs temperature readings in a digital format over a serial interface, making it easy to interface with microcontrollers and digital systems. It falls under the category of temperature sensors, which are part of the broader sensor family used in various electronic systems for monitoring and control.
Key features of the TMP411 include N-factor and series resistance correction, which improve remote sensing accuracy by compensating for non-idealities in the remote diode. It also features programmable temperature limits and an SMBus-compatible interface. The device operates from a supply voltage of 2.7V to 5.5V and has a resolution of 11 bits for both local and remote channels.
The TMP411 uses a delta-sigma ADC to convert the analog temperature signals to digital. It includes multiple registers for configuration and temperature data storage. The N-factor correction allows the device to be used with a wide variety of remote diodes, while series resistance correction compensates for resistance in the PCB traces, ensuring accurate readings even with long traces.
Typical applications include system thermal management in computers, servers, and industrial equipment, as well as environmental monitoring and battery management. The TMP411 is ideal for applications where accurate remote temperature sensing is required, such as monitoring the temperature of CPUs, GPUs, or other hot components.
When designing with the TMP411, ensure proper PCB layout to minimize noise on the remote sensing lines. Use a filter capacitor on the D+ and D- lines to reduce noise. Also, consider the supply voltage and ensure it is within the specified range for reliable operation.
直接替換替代品，適用於 TMP411 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TMP411 （相同外形與佔位） — 差異在於 Interface, Local Temperature Accuracy, N-Factor Correction, Remote Temperature Accuracy, Resolution.
TMP411-Q1
✅ 直接替換聯絡詢價
查看資料表 →TMP411D
✅ 直接替換📋 參考替代品（不在目錄中）
TMP451
✅ 直接替換📋 參考替代品（不在目錄中）
TMP431
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADT7461
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LM95234
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TMP411 最大額定值與電氣特性
| Local Temperature Accuracy | ±1°C (TMP411), ±0.8°C (TMP411D) |
| Remote Temperature Accuracy | ±1°C (TMP411), ±0.8°C (TMP411D) |
| Temperature Range | -40°C to 125°C |
| 解析度 | 11 bits |
| 介面 | Two-wire, SMBus compatible |
| 供應電壓 | 2.7V to 5.5V |
| Package Options | VSSOP-8, SOIC-8, SOT23-8 |
| N-Factor Correction | Yes |
| Series Resistance Correction | Yes |
| Number of Channels | 2 (local + remote) |
| 工作溫度範圍 | -40°C to 125°C |
| RoHS 狀態 | Compliant |
| 安裝類型 | Surface Mount |
| 輸出類型 | Digital |
| 感測器類型 | Local/Remote |
TMP411 腳位配置
| 腳位 1 | D+ — Remote temperature sensor positive input |
| 腳位 2 | D- — Remote temperature sensor negative input |
| 腳位 3 | GND — Ground |
| 腳位 4 | SDA — Serial data line (SMBus) |
| 腳位 5 | SCL — Serial clock line (SMBus) |
| 腳位 6 | ALERT — Alert output (open-drain) |
| 腳位 7 | V+ — Power supply (2.7V to 5.5V) |
| 腳位 8 | NC — No connect |
典型應用
TMP411 適用於 6 應用s: CPU/GPU Thermal Monitoring, Industrial Equipment Monitoring, Battery Management Systems, Environmental Monitoring, Medical Equipment, Automotive Climate Control.
CPU/GPU Thermal Monitoring
The TMP411 is ideal for monitoring CPU and GPU temperatures in computers and servers. Its remote sensing capability uses the diode-connected transistor inside the processor to measure die temperature accurately. With ±1°C accuracy and N-factor correction, it ensures reliable thermal management. The SMBus interface allows easy integration with system management controllers. The TMP411's series resistance correction compensates for PCB trace resistance, ensuring accurate readings even with long traces. This makes it a preferred choice for high-performance computing systems where thermal throttling is critical.
推薦
Industrial Equipment Monitoring
In industrial automation, the TMP411 monitors temperatures of motors, power supplies, and control cabinets. Its wide operating range of -40°C to 125°C suits harsh environments. The device's two-wire interface simplifies wiring in distributed systems. The TMP411's accuracy and correction features ensure reliable operation in noisy industrial settings. It can be used to trigger alarms or shutdowns when temperatures exceed safe limits, preventing equipment damage. The small SOIC-8 package fits compact designs, and the low power consumption makes it suitable for battery-powered sensors.
推薦
Battery Management Systems
The TMP411 monitors battery pack temperatures in electric vehicles and portable electronics. Its remote sensing can measure the temperature of individual cells using diode-connected transistors. The device's accuracy helps prevent overheating and extends battery life. The SMBus interface allows communication with the battery management controller. The TMP411's low supply voltage range (2.7V to 5.5V) is compatible with battery voltages. Its small package and low power consumption make it ideal for space-constrained designs.
推薦
Environmental Monitoring
The TMP411 can be used in environmental monitoring systems to measure ambient temperature. Its local sensor provides accurate readings, while the remote sensor can monitor external temperatures. The device's digital output simplifies data logging and analysis. The TMP411's accuracy and wide temperature range make it suitable for weather stations and HVAC systems. The two-wire interface allows multiple sensors to be connected on the same bus. The low power consumption is beneficial for battery-powered environmental sensors.
推薦
Medical Equipment
The TMP411 is used in medical devices for temperature monitoring, such as incubators and diagnostic equipment. Its accuracy and reliability are critical for patient safety. The remote sensing capability allows non-invasive temperature measurement. The device's small package and low power consumption are suitable for portable medical devices. The SMBus interface enables integration with microcontrollers for data processing. The TMP411's wide temperature range covers clinical requirements.
推薦
Automotive Climate Control
The TMP411 monitors cabin and engine temperatures in vehicles. The TMP411-Q1 variant is AEC-Q100 qualified for automotive use. Its remote sensing can measure temperatures in hard-to-reach areas. The device's accuracy ensures comfortable climate control and prevents engine overheating. The SMBus interface allows integration with the vehicle's CAN bus via a microcontroller. The TMP411's wide temperature range and robust design make it suitable for automotive environments.
推薦
推薦產品摘要
工程參考資料，適用於 TMP411 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TMP411-Q1 | TMP411D | TMP451 |
|---|---|---|---|---|
| Package | VSSOP-8, SOIC-8, SOT23-8 | VSSOP-8, SOIC-8, SOT23-8 | VSSOP-8, SOIC-8, SOT23-8 | VSSOP-8, SOIC-8, SOT23-8 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Local Accuracy | ±1°C | ±1°C | ±0.8°C | ±1°C |
| Remote Accuracy | ±1°C | ±1°C | ±0.8°C | ±1°C |
| Resolution | 11 bits | 11 bits | 11 bits | 12 bits |
| Supply Voltage | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V |
| N-Factor Correction | Yes | Yes | Yes | Yes |
| Automotive Grade | No | Yes (AEC-Q100) | No | No |
主要差異化特點
- N-factor and series resistance correction (對比TMP431)
- Automotive-grade option (對比TMP411D)
- Software compatibility with TMP451 (對比TMP451)
設計說明
For accurate remote sensing, keep the D+ and D- traces short and shielded from noise. Use a 100pF capacitor between D+ and D- to filter high-frequency noise. Avoid routing these traces near high-speed digital lines or power switching circuits. According to TI's datasheet, series resistance correction compensates for up to 1kΩ of trace resistance, but minimizing trace length is still recommended.
The TMP411 operates from 2.7V to 5.5V. Use a 0.1µF decoupling capacitor close to the V+ pin to filter supply noise. If the supply is noisy, consider adding a ferrite bead. The device draws low quiescent current, making it suitable for battery-powered applications. Ensure the supply voltage is stable to maintain accuracy.
When using the remote sensor, ensure the diode-connected transistor is properly biased. The TMP411 provides a bias current, but the diode must be connected correctly (D+ to anode, D- to cathode). Incorrect polarity will result in erroneous readings. Also, avoid using the ALERT pin without a pull-up resistor, as it is open-drain.
合規資訊
RoHS compliant per TI product page. TMP411-Q1 is AEC-Q100 qualified.
