TMP411BDGKR - ±1°C Remote/Local Temp Sensor | Texas Instruments
MPN： TMP411BDGKR ✓ 啟用中TMP411BDGKR 概覽
A remote/local digital temperature sensor is a monitoring IC that measures temperature both at its own silicon (local channel) and at a remote diode-connected transistor (remote channel), typically a low-cost NPN or PNP device integrated into a microcontroller, CPU, GPU, or FPGA die. These sensors form part of the thermal management hierarchy — sensor, monitor, supervisor, power-management IC — and communicate measurements to a host controller over a serial bus such as I2C or SMBus so that fan speed, clock throttling, or system shutdown can be managed automatically.
Key features include ±1°C maximum accuracy on both local and remote channels, 11-bit resolution (0.125°C per LSB) on the remote channel, support for a 2.7V to 5.5V supply range, and programmable N-factor correction that accommodates different transistor beta characteristics. The built-in series-resistance correction cancels the error introduced by PCB trace resistance in the remote diode loop, eliminating a common source of measurement error without precision layout constraints.
Architecturally, the TMP411 uses a delta-sigma style remote diode measurement with automatic averaging, beta compensation, and programmable offset registers. Its ALERT/THERM output supports interrupt and thermostat-style behavior with programmable high/low limits, and the ADD pin provides three selectable SMBus addresses for multi-device bus sharing. Pin and register compatibility with Analog Devices ADT7461 and ADM1032 simplifies migration between vendors.
Typical applications include CPU/FPGA/GPU die temperature monitoring in servers and networking equipment, thermal supervision in industrial controls and base stations, and power-supply over-temperature protection where the remote diode monitors a hotspot the local sensor cannot reach.
Design consideration: place the TMP411 thermally close to the local hotspot and route the D+/D- differential pair tightly, though series-resistance correction relaxes trace-resistance limits substantially.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, design notes, and an AEO-optimized FAQ not found on the manufacturer datasheet alone.
直接替換替代品，適用於 TMP411BDGKR — 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： TMP411BDGKR （相同外形與佔位） — 差異在於 Resolution, Interface, Package, N-Factor Correction, Operating Temperature Range.
TMP411ADGKR
✅ 直接替換聯絡詢價
查看資料表 →TMP411CDGKR
✅ 直接替換📋 參考替代品（不在目錄中）
TMP431BDGKR
✅ 直接替換📋 參考替代品（不在目錄中）
ADT7461ARMZ
✅ 直接替換📋 參考替代品（不在目錄中）
ADM1032ARMZ
✅ 直接替換📋 參考替代品（不在目錄中）
TMP411BDGKR 最大額定值與電氣特性
| 感測器類型 | Remote and Local Digital Temperature Sensor |
| Local Channel Accuracy | ±1°C |
| Remote Channel Accuracy | ±1°C |
| 解析度 | 11-bit (0.125°C remote) |
| Supply Voltage Range | 2.7 V to 5.5 V |
| 工作溫度範圍 | -40°C to +125°C |
| 介面 | I2C / SMBus |
| N-Factor Correction | Yes (programmable) |
| Series Resistance Correction | Yes |
| Alert Output | ALERT/THERM, programmable limits |
| Bus Address | 3 selectable addresses via ADD pin |
| 封裝 | 8-pin VSSOP (MSOP-8, DGK) |
| 安裝類型 | Surface Mount |
| Register Compatibility | Pin and register compatible with ADT7461 and ADM1032 |
| Typical Applications | CPU/FPGA/GPU thermal monitoring, industrial controls, power supplies |
| RoHS 狀態 | Compliant |
TMP411BDGKR 8-pin vssop (msop-8, dgk) 腳位配置指南
TMP411BDGKR（8-pin vssop (msop-8, dgk) 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： TMP411BDGKR.
請參閱 資料表 以查看完整腳位配置。
典型應用
TMP411BDGKR 適用於 6 應用s: CPU and GPU Die Temperature Monitoring, FPGA and ASIC Thermal Supervision, Server and Data Center Thermal Management, Power Supply Over-Temperature Protection, Industrial Control and Automation Systems, Networking and Telecom Equipment.
CPU and GPU Die Temperature Monitoring
The TMP411BDGKR is designed to read the on-die thermal diode of CPUs and GPUs, where its ±1°C remote accuracy and 11-bit (0.125°C) resolution allow the system controller to track junction temperature closely as load changes. The programmable N-factor correction matches the specific transistor beta of the processor die, while series-resistance correction cancels PCB trace errors over long remote-diode routings. Placed near the socket with D+/D- routed as a tightly coupled pair, the device streams measurements over SMBus at up to three selectable addresses, and the ALERT/THERM output can throttle clocks or trip a hard shutdown threshold without host intervention.
推薦
FPGA and ASIC Thermal Supervision
High-end FPGAs and ASICs expose diode-connected transistors specifically for external thermal monitoring, and the TMP411BDGKR's combination of N-factor correction and ±1°C remote accuracy makes it a strong fit. Its 2.7V to 5.5V supply range allows direct connection to common 3.3V I/O rails, and the register-compatible architecture with ADT7461 gives board designers vendor flexibility. The 0.125°C LSB resolution resolves small temperature gradients during bitstream reconfiguration or workload bursts, while the ADD pin address selection permits monitoring multiple FPGA zones on a single SMBus. Series-resistance correction relaxes trace-resistance budgets in dense boards, simplifying routing around the device.
推薦
Server and Data Center Thermal Management
In servers, the TMP411BDGKR monitors processor inlet temperature and hot spots that panel sensors cannot reach, feeding fan-control loops with 11-bit data. The ALERT/THERM pin implements autonomous over-temperature protection: programmable limits assert the output to force fan ramps or emergency shutdown even if the BMC is busy. SMBus operation with three selectable addresses supports multiple sensors per chassis, and pin/register compatibility with ADT7461 and ADM1032 simplifies second-source strategies across server generations. The -40°C to +125°C industrial range and ±1°C accuracy over that span keep readings trustworthy in thermally harsh rack environments with restricted airflow.
推薦
Power Supply Over-Temperature Protection
Power supplies and DC-DC converter assemblies accumulate heat near inductors and MOSFETs, and the TMP411BDGKR can watch these hotspots via a low-cost diode-connected transistor placed at the thermal point while the sensor IC sits in a cooler, electrically quiet area. Its ±1°C remote accuracy and 0.125°C resolution enable precise derating curves, and the programmable THERM threshold drives shutdown or fan boost directly from hardware. The 2.7V to 5.5V supply suits both 3.3V control sections and 5V housekeeping rails, and N-factor correction keeps readings accurate across different small-signal transistor choices used in production.
推薦
Industrial Control and Automation Systems
Industrial PLCs, motor drives, and edge controllers use the TMP411BDGKR to protect processors and power stages across -40°C to +125°C ambient conditions. The ±1°C channel accuracy supports control algorithms that must derate output power predictably with temperature, while the SMBus interface integrates with existing supervisory microcontrollers. The ALERT/THERM output provides hardware-level protection independent of firmware state, valuable in safety-oriented designs. Three bus addresses allow a single controller to poll several monitoring points — cabinet ambient, power module, and processor die — without an I2C multiplexer, and the small MSOP-8 footprint suits dense I/O boards.
推薦
Networking and Telecom Equipment
Routers, switches, and base-station hardware run 24/7 with limited airflow, making continuous die-level monitoring essential. The TMP411BDGKR reads the thermal diodes of network processors and FPGAs with ±1°C accuracy, and its series-resistance correction tolerates the longer D+/D- traces typical of large line cards. SMBus telemetry integrates with shelf managers in telecom racks, while the ALERT/THERM pin provides local, fail-safe throttling. The device's 2.7V to 5.5V supply operates from standard card rails, and its register compatibility with ADT7461 lets multi-vendor BOM strategies qualify one firmware driver across both suppliers.
推薦
推薦產品摘要
工程參考資料，適用於 TMP411BDGKR — 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 | TMP411ADGKR | TMP411CDGKR | TMP431BDGKR | ADT7461ARMZ | ADM1032ARMZ |
|---|---|---|---|---|---|---|
| Package | 8-pin VSSOP (MSOP-8, DGK) | 8-pin VSSOP (MSOP-8, DGK) - same | 8-pin VSSOP (MSOP-8, DGK) - same | 8-pin VSSOP (MSOP-8, DGK) - same | MSOP-8 - same footprint | MSOP-8 - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices |
| Resolution | 11-bit (0.125°C remote) | 11-bit | 11-bit | 12-bit capable (TMP431 family) | Up to 11-bit | Up to 11-bit |
| Supply Voltage Range | 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 (verify) | 3.0 V to 5.5 V (verify) |
| N-Factor Correction | Yes (programmable) | Yes | Yes | Yes (TMP431 family) | Extended range supported | Limited vs TMP411 |
| Interface / Addressing | I2C/SMBus, 3 addresses (ADD pin) | I2C/SMBus, 3 addresses | I2C/SMBus, 3 addresses | I2C/SMBus, address pins | SMBus/I2C, address pin | SMBus/I2C, fixed/pin address |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +120°C (verify) | -40°C to +120°C (verify) |
主要差異化特點
- Programmable N-factor correction (對比ADM1032ARMZ)
- Series-resistance correction (對比TMP431BDGKR)
- Pin and register compatibility with ADT7461/ADM1032 (對比ADT7461ARMZ)
- Trade-off: lower maximum resolution than TMP431 family (對比TMP431BDGKR)
設計說明
Route the D+ and D- remote-diode traces as a closely coupled differential pair and avoid running them alongside fast digital or switching-regulator lines. The TMP411's series-resistance correction cancels trace resistance (a major advantage over parts without it), but noise coupling still causes misreads. Place 1000 pF (typical, per manufacturer guidance) across D+/D- at the sensor side to filter noise, and keep the IC away from hot components if accurate local-channel readings are required.
Use 2.2k to 10k pull-up resistors on SDA and SCL sized to the SMBus bus capacitance; for a heavily loaded chassis bus with several devices, prefer 2.2k at 3.3V. The ADD pin must be tied to GND, V+, or SDA to select one of the three addresses — never leave it floating. Power the TMP411 from a quiet analog or filtered digital rail; supply ripple from nearby DC-DC converters can degrade remote-channel accuracy.
When substituting a pin-compatible part (ADT7461, ADM1032, TMP431), do not assume identical register defaults: offset registers, N-factor settings, and conversion-rate defaults can differ and silently shift reported temperatures. Verify the remote diode's N-factor against the datasheet correction table, and confirm the ALERT/THERM pin's configured polarity and mode in firmware before relying on it as a hardware protection trip point.
合規資訊
RoHS compliant per distributor listings and TI product page. REACH, halogen-free, and conflict-minerals statements not found in provided data — consult TI product folder.
