TMP411CDGKT - ±1°C Remote/Local Temp Sensor MSOP-8 | TI
料号： TMP411CDGKT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.65 | $1.65 |
| 10 | $1.48 | $14.80 |
| 100 | $1.28 | $128.00 |
| 500 | $1.12 | $560.00 |
| 1,000 | $0.98 | $980.00 |
TMP411CDGKT 概述
A remote digital temperature sensor is a monitoring IC that measures the junction temperature of a distant diode-connected transistor - typically an on-chip sensing diode built into a CPU, GPU, FPGA, or ASIC - in addition to its own local die temperature. These sensors form the monitoring layer of the power-management hierarchy, feeding a host controller over a two-wire SMBus/I2C-style interface so that fans, clock throttling, and shutdown protection can react to real silicon temperatures.
Key features of the TMP411C include ±1°C remote diode sensing accuracy, ±1°C local accuracy across the operating range, programmable non-ideality (N-factor) correction to compensate for different process transistors, and automatic series-resistance cancellation that removes the error caused by PCB trace resistance of up to several hundred ohms in the D+/D- loop.
Architecturally, the device excites the remote diode with two different currents and measures the resulting delta-VBE, converting it through an on-chip 11-bit ADC into a two-wire digital code. Register-based high and low limits drive the ALERT and THERM outputs, allowing both interrupt-driven and hardware-throttle fault responses without host intervention.
Typical applications include CPU/FPGA/ASIC junction monitoring in servers, telecom line cards, and industrial control systems, where the N-factor and series-resistance corrections let one PCB footprint support many silicon vendors.
Design consideration: place the sensor close to the heat source and use a diode-connected NPN with a recommended operating range; route D+/D- as a closely coupled pair to minimize noise pickup.
This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： TMP411CDGKT ——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： TMP411CDGKT （相同外形与封装尺寸） ——差异在于 Interface, Resolution, Sensor Type, N-Factor Correction, Operating Temperature Range.
快速对比工具——选择替代料号进行并排对比：
TMP411ADGKT
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TMP411BDGKT
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TMP411EDGKT
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TMP411ADGKR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.38 / 个
查看数据手册 →TMP411CQDGKRQ1
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.18 / 个
查看数据手册 →TMP431ADGKT
✅ 直接替换📋 参考替代料（不在目录中）
TMP411CDGKT 最大额定值与电气特性
| 传感器类型 | Remote and Local Temperature Sensor |
| Remote Temperature Accuracy | ±1°C (TMP411C) |
| Sensing Temperature Range | -40°C ~ 125°C |
| 分辨率 | 11 bit (0.0625°C) |
| 电源电压 | 2.7 V ~ 5.5 V |
| 接口 | SMBus (2-wire serial) |
| 输出类型 | Digital, SMBus; ALERT and THERM outputs |
| N-Factor Correction | Yes (programmable non-ideality) |
| Series Resistance Correction | Yes |
| 封装 / 外壳 | 8-VSSOP / MSOP-8 (DGK), 3.00 mm width |
| 安装类型 | Surface Mount |
| 工作温度 | -40°C ~ 125°C |
| Supplier Device Package | DGK-8 |
| Packaging | Cut Tape |
| RoHS 状态 | Compliant |
TMP411CDGKT 引脚配置
| 引脚 1 | V+ — Power supply, 2.7 V to 5.5 V |
| 引脚 2 | D+ — Remote diode anode input |
| 引脚 3 | D- — Remote diode cathode input |
| 引脚 4 | THERM — THERM hardware throttle/fault output (open-drain) |
| 引脚 5 | GND — Ground |
| 引脚 6 | ALERT — SMBus alert/interrupt output (open-drain) |
| 引脚 7 | SCL — SMBus serial clock |
| 引脚 8 | SDA — SMBus serial data |
典型应用
TMP411CDGKT 适用于 6 应用s: CPU / Processor Junction Monitoring, FPGA / ASIC Thermal Management, Server and Data Center Thermal Monitoring, Industrial Control and Automation, Telecom and Networking Equipment, Battery-Powered and Portable Instrumentation.
CPU / Processor Junction Monitoring
The TMP411CDGKT is purpose-built for monitoring the junction temperature of CPUs, GPUs, and SoCs by measuring the on-die sense transistor. The ±1°C remote accuracy and 0.0625°C resolution give the host controller early warning before thermal limits are reached, and the N-factor correction adapts the sensing algorithm to each vendor's process transistor - critical when one board design must support multiple processor sources. Series-resistance cancellation removes the error introduced by D+/D- trace resistance, so the sensor can be placed centimeters away from the socket without accuracy loss. The THERM output can directly drive hardware throttling circuits, providing a last-line thermal protection path independent of firmware. Place the DGK-8 device near the processor power delivery to track the hottest local environment while keeping the diode loop short and tightly coupled.
推荐
FPGA / ASIC Thermal Management
FPGAs and ASICs commonly expose a diode-connected sensing transistor precisely so external monitors such as the TMP411CDGKT can track die temperature. The 11-bit, 0.0625°C resolution supports fine-grained fan and clock-throttle control curves in reconfigurable computing and telecom line-card designs. Because the TMP411C compensates both N-factor and series resistance, the same PCB footprint works across FPGA families from different vendors - reducing BOM variants. The ALERT output drives an SMBus interrupt to the management controller for early warning, while THERM provides autonomous hardware protection if the host hangs. Supply the sensor from the clean 3.3 V auxiliary rail (2.7 V to 5.5 V range) and keep the D+/D- pair away from switching regulator nodes to preserve the ±1°C remote accuracy specification.
推荐
Server and Data Center Thermal Monitoring
In server motherboards and storage backplanes, dozens of thermal zones feed the BMC (Baseboard Management Controller); the TMP411CDGKT serves CPU, GPU, and hot-swap converter zones through its SMBus interface at 2.7 V to 5.5 V supply. The 0.0625°C resolution enables fine PID fan-speed control, cutting acoustic noise and fan power, while the ALERT/THERM dual-fault architecture lets the BMC log a pre-warning and still allow an autonomous hardware shutdown path. The ±1°C remote accuracy keeps thermal guardbands tight, protecting performance headroom in dense chassis. Because all TMP411 grades share the same MSOP-8 footprint and register map, procurement can second-source accuracy grades (A/B/C/E) without any board respin - a key supply-chain benefit for long-life server platforms.
推荐
Industrial Control and Automation
Industrial PLC I/O modules, motor drives, and edge controllers need both board-level and power-device temperature visibility. The TMP411CDGKT covers -40°C to +125°C, matching the extended industrial ambient range, and its SMBus output integrates directly with microcontroller-based control systems without an ADC channel. The remote channel monitors IGBT/MOSFET-adjacent diode sensors or heatsink-mounted discrete diodes, while the local channel tracks the controller board ambient. With 2.7 V to 5.5 V operation, it runs from either 3.3 V or 5 V industrial rails. For designs heading to automotive-adjacent industrial equipment, the pin-compatible TMP411CQDGKRQ1 offers AEC-Q100 qualification on the same footprint, simplifying cross-market platform reuse.
推荐
Telecom and Networking Equipment
Optical modules, switch line cards, and radio units combine high heat density with strict reliability requirements. The TMP411CDGKT monitors laser driver and DSP die temperatures through their diode outputs; its 0.0625°C resolution supports the fine control loops needed for laser wavelength and bias stability, while the ±1°C accuracy keeps calibration tables compact. The SMBus 2.7 V to 5.5 V interface connects to the card's management MCU, and ALERT provides an interrupt-driven fault path for hot-swap protection. Series-resistance correction is valuable in telecom layouts where the remote diode loop crosses connectors or long traces. The MSOP-8 (DGK) 3.00 mm body fits the tight vertical envelopes of SFP/QSFP module sites.
推荐
Battery-Powered and Portable Instrumentation
Portable test instruments and battery-pack electronics benefit from the TMP411CDGKT's low-voltage 2.7 V operation and SMBus digital output that eliminates external ADC components. The local channel monitors the instrument enclosure ambient, and the remote channel tracks the processor or power-converter die inside the same housing. The programmable limits plus ALERT output let the host sleep between conversions and wake only on out-of-range events, conserving battery budget. With 0.0625°C resolution, charge-control and display-backlight algorithms can react smoothly to small temperature changes. The 3.00 mm-wide MSOP-8 package suits handheld PCB real estate, and the shared TMP411 footprint allows easy migration to the higher-accuracy A grade or the automotive Q1 variant as product requirements evolve.
推荐
推荐产品汇总
工程参考数据： TMP411CDGKT ——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 | TMP411ADGKT | TMP411EDGKT | TMP411CQDGKRQ1 | TMP431ADGKT |
|---|---|---|---|---|---|
| Package | MSOP-8 (DGK), 3.00 mm | MSOP-8 (DGK) - same | MSOP-8 (DGK) - same | MSOP-8 (DGK) - same | MSOP-8 (DGK) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Remote Accuracy | ±1°C (C grade) | ±1°C class, tighter A grade | ±1°C class, E grade | ±1°C (C grade, AEC-Q100) | ±1°C class (A grade) |
关键差异点
- Programmable N-factor correction adapts to any silicon vendor （对比 TMP75AIDGKR)
- Automotive AEC-Q100 pin-compatible variant exists （对比 TMP411CQDGKRQ1)
- Series-resistance cancellation relaxes placement constraints （对比 TMP431ADGKT)
设计说明
Route D+ and D- as a closely coupled pair (spacing under 0.2 mm where possible) away from switching-regulator nodes and clock lines. The series-resistance correction cancels loop resistance, but excessive capacitance pickup on an unterminated pair still degrades remote accuracy. Use a 0.1 uF bypass capacitor within 2 mm of the V+ pin and a solid ground return under the sensor. Two to three layers of ground plane under the DGK-8 footprint minimize local thermal gradients between the sensor die and the measurement target.
Always verify the remote diode N-factor against the target CPU/FPGA datasheet and program the N-factor correction register accordingly - the default setting matches a typical transistor (N=1.008) and can produce several degrees of systematic error on non-typical processes. Both ALERT and THERM are open-drain outputs and require pull-up resistors to the logic rail; leaving them floating makes faults invisible to the host. Do not exceed the 2.7 V to 5.5 V supply range during hot-plug transients.
Estimated: supply the TMP411CDGKT from a clean 3.3 V rail rather than a heavily loaded 5 V rail; with typical sub-milliamp quiescent current the sensor contributes negligible power dissipation, so self-heating is dominated by PCB thermal gradients rather than the IC. Decouple with 0.1 uF ceramic plus optional 1 uF bulk if the rail is shared with noisy digital loads. On shared SMBus buses, keep total bus capacitance within SMBus limits to preserve timing margins across the full temperature range.
合规信息
RoHS compliance per TI product page and distributor listings for the active TMP411 family. The AEC-Q100 qualified variant is TMP411CQDGKRQ1; the standard TMP411CDGKT is not automotive qualified.
