TMP411-Q1 - ±1°C Remote/Local Temp Sensor | Texas Instruments
料号： TMP411-Q1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.15 | $2.15 |
| 10 | $1.9 | $19.00 |
| 100 | $1.55 | $155.00 |
| 500 | $1.3 | $650.00 |
| 1,000 | $1.1 | $1,100.00 |
TMP411-Q1 概述
A temperature sensor converts thermal energy into an electrical signal for monitoring and control. The TMP411-Q1 belongs to the digital temperature sensor class, outputting 12-bit readings over an I2C/SMBus two-wire interface instead of an analog voltage. Within the thermal-management hierarchy it sits as a remote/local digital sensor monitor within the broader sensor and power-management families used across automotive, industrial, and computing platforms.
Key features include programmable non-ideality (N) factor and series-resistance cancellation, which compensate for external transistor non-idealities and PCB trace resistance to preserve accuracy across the full range. Programmable resolution and threshold limits, minimum/maximum temperature monitors, diode fault detection, and a temperature alert function complete the feature set.
Technically, the TMP411-Q1 uses an internal ADC to measure the voltage across a diode-connected remote transistor, typically NPN/PNP devices embedded in MCUs, MPUs, or FPGAs. N-factor correction adjusts for the ideality factor of the external transistor, while series-resistance correction cancels line-resistance error. SMBus timeout and alert-response support improve bus robustness, and low shutdown quiescent current (approximately 8 uA) suits always-on automotive nodes.
Typical applications include automotive battery management systems, engine control units, infotainment processors, and CPU/GPU thermal monitoring in embedded and data-center systems, where accurate remote junction sensing directly protects performance and reliability.
Design tip: keep remote-sense traces short and routed as a differential pair away from noise, configure the N-factor and series-resistance registers to match the external transistor, and use pull-ups on the open-drain I2C and alert lines. Prices shown are as of 2026-08-29.
直接替换替代料： TMP411-Q1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TMP411-Q1 （相同外形与封装尺寸） ——差异在于 Interface, Resolution, Sensor Type, N-Factor Correction, Local Temperature Accuracy.
快速对比工具——选择替代料号进行并排对比：
TMP411D-Q1
✅ 直接替换📋 参考替代料（不在目录中）
TMP411ADGKR
✅ 直接替换✓ 有现货
$0.38 / 个
查看数据手册 →TMP451-Q1
⚡ 相同封装📋 参考替代料（不在目录中）
ADM1032A
⚡ 相同封装 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX6654
⚡ 相同封装 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TMP411-Q1 最大额定值与电气特性
| 传感器类型 | Digital, Local/Remote Temperature Sensor |
| Local Temperature Accuracy | ±1°C |
| Remote Temperature Accuracy | ±1°C (±0.8°C for TMP411D-Q1) |
| Local Measurement Range | -40°C to +125°C |
| Remote Measurement Range | up to 150°C |
| 电源电压 | 2.7 V to 5.5 V |
| 接口 | I2C/SMBus two-wire |
| 分辨率 | Up to 12-bit (programmable) |
| Shutdown Quiescent Current | approximately 8 uA |
| N-Factor Correction | Yes (programmable) |
| Series Resistance Cancellation | Yes |
| Alert Outputs | THERM and ALERT/THERM2 (open-drain) |
| Fault Detection | Diode fault detection |
| 封装 | 8-VSSOP (DGK), 3x3 mm |
| 工作温度 | -40°C to +125°C |
| Qualification | AEC-Q100 qualified (automotive) |
| 安装类型 | Surface Mount |
TMP411-Q1 引脚配置
| 引脚 1 | D- — Remote diode cathode (negative sense input) |
| 引脚 2 | D+ — Remote diode anode (positive sense input) |
| 引脚 3 | THERM — Open-drain over-temperature output (requires pull-up to V+) |
| 引脚 4 | GND — Ground |
| 引脚 5 | ALERT/THERM2 — Open-drain alert / second threshold output (requires pull-up) |
| 引脚 6 | ADD0 — I2C/SMBus address select pin |
| 引脚 7 | SCLK — Serial clock (I2C/SMBus) |
| 引脚 8 | SDATA — Serial data (I2C/SMBus) |
典型应用
TMP411-Q1 适用于 6 应用s: Automotive Battery Management Systems, Engine Control Units (ECU), Automotive Infotainment Processors, CPU/GPU Thermal Monitoring in Embedded Systems, Industrial Automation Thermal Protection, Test and Measurement Instrumentation.
Automotive Battery Management Systems
The TMP411-Q1's AEC-Q100 qualification and ±1°C remote accuracy make it a strong fit for BMS cell and module temperature monitoring. Its remote channel senses the junction of a diode-connected transistor placed on the battery board, with measurement range up to 150°C covering thermal-runaway margins. The series-resistance correction cancels PCB trace error up to several ohms, and the open-drain THERM/ALERT outputs give the BMS controller a hardware-level over-temperature interrupt independent of the I2C polling loop, while 8 uA shutdown current preserves battery budget during standby.
推荐
Engine Control Units (ECU)
In engine control units, the TMP411-Q1 monitors junction temperatures of the main MCU and power devices using its remote diode channel, with local sensing for the PCB ambient. The programmable N-factor register adapts to the specific automotive MCU's on-die transistor, keeping ±1°C accuracy across silicon revisions. AEC-Q100 qualification is mandatory here, and the diode fault detection output flags open or shorted sense diodes so the ECU can fall back to safe strategies rather than acting on invalid temperature data.
推荐
Automotive Infotainment Processors
Infotainment SoCs such as Jacinto/DRAx run hot and require accurate junction monitoring for dynamic thermal management. The TMP411-Q1 reads the SoC's embedded thermal diode with up to 12-bit programmable resolution, letting the host throttle clocks before hitting thermal limits. The minimum/maximum temperature monitors simplify logging, and the two open-drain alert pins (THERM and ALERT/THERM2) can implement separate warn and trip thresholds over I2C, protecting user experience while preventing shutdown in dash-mount environments reaching +85°C ambient.
推荐
CPU/GPU Thermal Monitoring in Embedded Systems
The TMP411-Q1 inherits the classic PC-style remote-diode monitoring role: sensing CPU, GPU, or FPGA junction temperatures over SMBus. Its register architecture follows the LM90-family convention familiar to server and embedded-BMC firmware, and the SMBus alert-response protocol enables multiple sensors to share one bus. With 8 uA shutdown current and a compact 3x3 mm VSSOP-8 footprint, it fits dense compute boards where channel count and thermal data fidelity directly govern fan control and performance scaling.
推荐
Industrial Automation Thermal Protection
In industrial drives, PLCs, and motor-control panels, the TMP411-Q1 provides two-wire I2C temperature telemetry from IGBT/MOSFET hotspots using a diode-connected transistor mounted near the power stage. Its 2.7V-5.5V supply tolerance matches standard 3.3V/5V control rails, and fault detection distinguishes a missing sensor from a genuine over-temperature event - critical for avoiding nuisance trips. The programmable threshold and hysteresis registers let one device implement staged protection: fan speed-up, derating, and final shutdown.
推荐
Test and Measurement Instrumentation
Bench instruments and data loggers use the TMP411-Q1 for precise thermal logging of ASICs and voltage-reference environments. The 12-bit programmable resolution yields about 0.0625°C steps, and the ±0.8°C enhanced TMP411D-Q1 variant is available for tighter applications. SMBus timeout support prevents bus lockups in long cabling scenarios, while the minimum/maximum monitor registers allow autonomous peak-capture between host polls - useful for characterizing thermal transients in power supplies and RF amplifiers.
推荐
推荐产品汇总
工程参考数据： TMP411-Q1 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | TMP411D-Q1 | TMP411ADGKR | TMP451-Q1 | ADM1032A |
|---|---|---|---|---|---|
| Package | 8-VSSOP (DGK) | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | 8-VSSOP (DGS, smaller) - near | 8-MSOP - near |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Remote Accuracy | ±1°C | ±0.8°C | ±1°C | ±1°C | ±1°C |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 3.0 V to 5.5 V |
| Automotive Grade (AEC-Q100) | Yes | Yes | No | Yes | No |
| N-Factor Correction | Yes (programmable) | Yes | Yes | Yes | Pin-selectable |
| Series Resistance Cancellation | Yes | Yes | Yes | Yes | No |
| Interface | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus | SMBus/I2C |
关键差异点
- Automotive AEC-Q100 qualification with dual correction features （对比 TMP411ADGKR)
- Series resistance cancellation （对比 ADM1032A)
- Higher accuracy variant available in same package （对比 TMP451-Q1)
设计说明
Route the D+/D- remote-sense traces as a short, tightly coupled differential pair away from switching regulators and high-current paths. The TMP411-Q1's series-resistance correction register can cancel several ohms of trace resistance, but noise coupling still causes reading jitter; place a 1000 pF (typical) differential filter capacitor across D+/D- close to the sensor, and a 100 pF to ground on each line if the environment is severe.
Configure the N-factor register to match the ideality factor of the specific external transistor (MCU/MPU/FPGA on-die diode) before trusting absolute readings - a mismatched N-factor introduces systematic error beyond the ±1°C spec. Both THERM and ALERT/THERM2 are open-drain outputs and will not assert visibly without pull-up resistors to V+; enable SMBus timeout if the bus traverses cables or long harnesses.
Decouple V+ with a 0.1 uF ceramic capacitor placed within 2 mm of the supply pin. Supply range is 2.7V to 5.5V, so 3.3V and 5V rails are both acceptable; at 5V, verify the I2C pull-up voltage and bus capacitance do not exceed SMBus limits. Shutdown mode draws approximately 8 uA - use it in always-on automotive nodes to preserve quiescent budget.
合规信息
AEC-Q100 qualified per TI automotive product classification (TMP411AQDGKRQ1). RoHS/lead-free per TI standard packaging; other values not stated in provided data.
