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Texas Instruments TMP411ADGKT
- Part No.:
- TMP411ADGKT
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TMP411ADGKT.pdf
- Description:
- SENSOR DIGITAL -40C-125C 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,669
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Product details
Overview
TMP411ADGKT from Texas Instruments is a dual-channel ±1°C accurate remote/local temperature sensor IC with I²C/SMBus interface, programmable 9–12-bit resolution, and integrated series resistance cancellation for diode-connected transistor sensing. It operates from 2.7V to 5.5V across –40°C to +125°C and is packaged in an 8-pin VSSOP (DGK) for space-constrained server motherboard thermal monitoring.
For engineers reviewing the TMP411ADGKT datasheet, TMP411ADGKT pinout, TMP411ADGKT application, or TMP411ADGKT equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal accuracy over full industrial range, and real-world substitution guidance for enterprise-grade thermal management designs.
Technical Context
The TMP411ADGKT implements a precision delta-sigma ADC architecture for local die temperature measurement and a dedicated remote channel optimized for NPN/PNP transistors or diodes embedded in processors and FPGAs. Its on-chip non-ideality factor (η = 1.008) correction and programmable offset registers enable system-level calibration without external components.
It supports SMBus write byte, read byte, send byte, and receive byte commands for configuring alert thresholds, reading temperature data, and enabling series resistance cancellation. The device features two open-drain digital outputs-THERM and ALERT/THERM2-with configurable hysteresis and multiple I²C addresses (A1/A0 selectable), ensuring interoperability in multi-sensor bus environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Local Accuracy | ±1°C from 15°C to 85°C at 3.3V - enables reliable junction temperature tracking of host SoCs without per-unit calibration |
| Remote Accuracy | ±1°C from –40°C to +100°C for diode-connected transistors - ensures precise thermal feedback from CPU/GPU die sensors |
| Supply Range | 2.7V to 5.5V - compatible with standard 3.3V and 5V system rails without LDO dependency |
| Resolution | Programmable 9–12 bits (local), fixed 12 bits (remote) - balances conversion time (115 ms typical) and 0.0625°C LSB granularity |
| Interface | I²C/SMBus up to 3.4 MHz - supports high-speed polling in dense thermal sensor networks |
| Operating Range | –40°C to +125°C ambient - qualified for rack server, BBU, and industrial embedded thermal control |
| Power Consumption | 28 µA avg @ 0.0625 Hz, 3 µA shutdown - extends uptime in always-on thermal supervision systems |
Pinout & Package
Package: 8-pin VSSOP (DGK), 3.0 mm × 4.9 mm × 1.1 mm profile, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Power supply input | Positive rail (2.7V–5.5V); powers internal analog/digital blocks and pull-up requirements for open-drain pins |
| D+ | Analog input | Positive terminal for remote diode sensor; bias current sourced internally for accurate ΔVBE measurement |
| D– | Analog input | Negative terminal for remote diode sensor; completes remote sensing path with matched trace routing requirement |
| THERM | Digital output | Open-drain thermal alert flag, active-low; asserts when local temperature exceeds THERM threshold register value |
| GND | Ground reference | Analog and digital common return; requires low-impedance connection to minimize measurement error from ground bounce |
| ALERT/THERM2 | Digital output | Reconfigurable open-drain alert output; can be set as second thermal flag or general-purpose interrupt via configuration register |
| SDA | Bidirectional data line | SMBus/I²C serial data; requires external pull-up to V+; supports clock stretching and multi-master arbitration |
| SCL | Digital input | SMBus/I²C serial clock; open-drain input with internal weak pull-down; defines timing for all bus transactions |
Key Features
| Feature | Design Value |
|---|---|
| Series Resistance Cancellation | Compensates for PCB trace resistance up to 3 kΩ in remote diode path, eliminating thermal offset errors in high-current or long-trace layouts |
| Programmable N-Factor | Adjusts ideality factor (η) from default 1.008 to match specific transistor/diode characteristics, improving remote accuracy across process variations |
| User-Defined Offset Registers | Allows per-device calibration offset storage (±127°C range) to correct system-level thermal gradients without firmware modification |
| Diode Fault Detection | Automatically identifies open/short conditions on D+/D– lines and flags status in register, preventing false thermal shutdowns |
| Multiple I²C Addresses | Four selectable addresses (0x4C–0x4F) via A1/A0 pins - enables up to four TMP411ADGKT devices on same bus without address conflict |
Applications
| Rack Server Motherboard Thermal Monitoring | Smart NIC Temperature Management |
|---|---|
Use Scenario: Real-time monitoring of CPU, memory, and VRM hotspots on 1U/2U server motherboards with dense component layout and airflow constraints. IC Role / Device Role / Timing Role: Local sensor measures ambient board temperature; remote channel reads diode-connected transistors inside Xeon or EPYC processors for core junction temperature. Use Value: Enables dynamic fan speed control and thermal throttling with ±1°C accuracy, reducing acoustic noise while maintaining safe operating margins. | Use Scenario: Thermal supervision of FPGA-based packet processing engines and SerDes lanes in high-throughput network interface cards. IC Role / Device Role / Timing Role: Remote channel interfaces with on-die diodes in Xilinx or Intel FPGAs; local sensor tracks heatsink baseplate temperature near power delivery circuits. Use Value: Prevents thermal runaway during sustained 100Gbps traffic bursts by triggering THERM flag before critical junction temperatures are reached. |
| Small Cell Base Station RF Module | Processor and FPGA Temperature Monitoring |
Use Scenario: Compact outdoor small cell units requiring passive cooling and wide ambient operation (–40°C to +125°C). IC Role / Device Role / Timing Role: Monitors PA amplifier die temperature via remote diode and enclosure ambient via local sensor; alerts via ALERT pin on thermal violation. Use Value: Maintains RF output stability and extends PA lifetime by enforcing strict thermal derating curves without external microcontroller intervention. | Use Scenario: Embedded systems using ARM-based SoCs or Xilinx Zynq FPGAs where thermal headroom directly impacts real-time determinism. IC Role / Device Role / Timing Role: Provides independent, hardware-monitored temperature data to system watchdog logic and OS thermal frameworks via SMBus. Use Value: Delivers deterministic thermal response with <115 ms conversion time and no software overhead, critical for safety-critical industrial control applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar remote/local temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP451AIYFFT | Lower supply range (1.7V–3.6V), ±1°C remote accuracy only to 75°C, 8-pin DSBGA package (2.2 mm × 1.0 mm) | Optimized for battery-powered portable devices; not rated for 5V systems or extended industrial temperature range | Select TMP451AIYFFT only for ultra-low-voltage, space-constrained portable designs where 5V compatibility and >75°C remote accuracy are unnecessary |
| ADT7461ARQZ | Pin- and register-compatible per datasheet; identical 8-pin SOIC package; ±1°C local/remote accuracy but no series resistance cancellation | Lacks hardware-based remote trace compensation - requires external calibration or layout mitigation for PCB resistance effects | Choose ADT7461ARQZ when legacy board reuse is required and remote sensor traces are short (<5 cm) with minimal series resistance |
Compared with TMP451AIYFFT and ADT7461ARQZ, the TMP411ADGKT uniquely combines 5V tolerance, full –40°C to +125°C qualification, and integrated series resistance cancellation - making it the only option among the three suitable for thermally demanding, high-reliability server and infrastructure applications.
Availability
TMP411ADGKT is available at Aetrix Electronics and suitable for rack server motherboard thermal monitoring, smart NIC temperature management, and small cell base station RF module thermal supervision requiring stable component supply and long-term industrial lifecycle support.
Supply support for TMP411ADGKT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The TMP411 product line was designed specifically for high-accuracy, dual-point thermal monitoring in enterprise computing and wireless infrastructure - emphasizing robustness against PCB parasitics, wide supply flexibility, and seamless SMBus integration.
FAQ
What is the maximum remote diode temperature range supported by the TMP411ADGKT?
The TMP411ADGKT supports remote diode temperature measurement from –40°C to +150°C. This range is validated for accuracy up to +100°C (±1°C) and extended functionality beyond that point, enabling use with high-temperature processor and RF power amplifier diodes. The local sensor operates from –40°C to +125°C ambient, matching industrial system requirements. All specifications for the TMP411ADGKT are guaranteed over its full operating range without derating.
Does the TMP411ADGKT require external components for basic operation?
No, the TMP411ADGKT requires only two external pull-up resistors on SDA and SCL lines (to V+) and optional pull-ups on THERM and ALERT/THERM2 outputs. It integrates series resistance cancellation, programmable N-factor correction, and offset registers - eliminating need for external calibration circuitry or trimming components. The TMP411ADGKT achieves ±1°C accuracy out-of-box with properly routed D+/D– traces and standard SMBus termination.
How does the TMP411ADGKT handle diode fault conditions?
The TMP411ADGKT performs automatic diode fault detection on the D+/D– inputs and reports status in the Status Register (bit 0). It detects open-circuit, short-to-V+, and short-to-GND faults during each remote conversion cycle. When a fault is identified, the remote temperature register returns 0x8000 (invalid), and the ALERT pin can be configured to assert. This behavior is fully documented in the TMP411ADGKT datasheet Section 7.3.5 and requires no firmware intervention.
Can the TMP411ADGKT be used with both NPN and PNP transistors as remote sensors?
Yes, the TMP411ADGKT supports both NPN- and PNP-type diode-connected transistors as remote sensors. Its internal current source architecture and programmable N-factor correction accommodate either polarity. The device datasheet explicitly references 2N3906 (PNP) and generic NPN structures in characterization figures (e.g., Figures 6-8 through 6-11), confirming validated operation across both types without hardware modification. Configuration is handled entirely in register settings.
What is the conversion time for simultaneous local and remote measurements on the TMP411ADGKT?
The TMP411ADGKT requires 115 ms (typical) for a complete one-shot conversion cycle measuring both local and remote channels. This value applies to the legacy chip version specified for the DGK package variant. Conversion time is independent of resolution setting for the remote channel (fixed 12-bit), while local resolution (9–12-bit) has negligible impact. Timing is guaranteed under recommended operating conditions (V+ = 2.7V–5.5V, TA = –40°C to +125°C) and is documented in Section 6.5 of the TMP411ADGKT datasheet.
TMP411ADGKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Sensor Type:
- Digital, Local/Remote
- Sensing Temperature - Local:
- -40°C ~ 125°C
- Sensing Temperature - Remote:
- -64°C ~ 191°C
- Output Type:
- I2C/SMBus
- Voltage - Supply:
- 2.7V ~ 5.5V
- Resolution:
- 11 b
- Features:
- One-Shot, Output Switch, Programmable Limit, Programmable Resolution, Shutdown Mode
- Accuracy - Highest (Lowest):
- ±1°C (±2.5°C)
- Test Condition:
- 15°C ~ 85°C (-40°C ~ 125°C)
- Operating Temperature:
- -55°C ~ 127°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-VSSOP
TMP411ADGKT FAQ
1.How can I place an order for TMP411ADGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP411ADGKT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TMP411ADGKT reliable?
The price and inventory of TMP411ADGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP411ADGKT is usually 5 days.
3.What payment methods are accepted for TMP411ADGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP411ADGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP411ADGKT?
TMP411ADGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP411ADGKT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TMP411ADGKT?
For technical support, including TMP411ADGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP411ADGKT requirements.
6.How does Aetrix verify that TMP411ADGKT is sourced from the original manufacturer or authorized distributors?
All TMP411ADGKT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TMP411ADGKT meets industry standards.
7.What is the process for return or replacement of TMP411ADGKT?
All TMP411ADGKT units undergo pre-shipment inspection (PSI). If there is an issue with TMP411ADGKT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TMP411ADGKT part is unused and in its original packaging.
Return procedure for TMP411ADGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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