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Texas Instruments TMP411ADR
- Part No.:
- TMP411ADR
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TMP411ADR.pdf
- Description:
- SENSOR DIGITAL -40C-125C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:9,276
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Product details
Overview
TMP411ADR 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 used in rack server motherboard thermal monitoring where precision local + remote die temperature tracking is required.
For engineers reviewing the TMP411ADR datasheet, TMP411ADR pinout, TMP411ADR application, or TMP411ADR equivalent, this page delivers verified electrical specs, package mapping (VSSOP-8), SMBus timing compliance, diode fault detection capability, and real-world calibration features including N-factor correction and offset registers - all confirmed for the TMP411ADR variant.
Technical Context
The TMP411ADR implements a two-wire SMBus-compatible interface supporting write byte, read byte, send byte, and receive byte commands for configuration and temperature reading. Its analog front-end includes dedicated D+ and D– inputs for remote diode sensing, with built-in series resistance cancellation and programmable non-ideality factor (η = 1.008) to correct for transistor imperfections.
It integrates separate local thermal transistor and remote diode measurement paths, both with independent programmable resolution (9–12 bits local, fixed 12-bit remote), alert/therm output pins, and register-based threshold monitoring. The device supports multiple I²C addresses (A/B/C/E variants) and maintains pin/register compatibility with ADT7461 and ADM1032 for drop-in migration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Local Accuracy | ±1°C over 15°C to 85°C at V+ = 3.3V - enables reliable CPU/GPU junction temperature estimation without system-level calibration. |
| Remote Accuracy | ±1°C over –40°C to +100°C (TDIODE) - ensures precise thermal feedback from embedded processor diodes under industrial ambient conditions. |
| Supply Range | 2.7V to 5.5V - compatible with standard 3.3V and 5V system rails, eliminating need for auxiliary LDOs in server or NIC designs. |
| Interface | I²C/SMBus up to 3.4 MHz - supports high-speed polling in dense multi-sensor thermal management systems with minimal bus overhead. |
| Resolution | Programmable 9–12-bit local, fixed 12-bit remote - allows trade-off between conversion time (115 ms typical) and thermal resolution (0.0625°C LSB). |
| Package | VSSOP-8 (3.0 mm × 4.9 mm) - surface-mount footprint optimized for space-constrained server motherboard layouts near processors and memory. |
| Operating Temp | –40°C to +125°C ambient - validated for continuous operation in enterprise compute environments with high power density and airflow constraints. |
Pinout & Package
VSSOP-8 package (TI designation DGK), 3.0 mm × 4.9 mm × 1.1 mm body, exposed pad not present, RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Power supply input | Positive rail (2.7V–5.5V); powers internal ADC, digital logic, and remote sensor bias current source. |
| D+ | Analog remote sensor input | Positive terminal of external diode-connected transistor; accepts current-driven remote temperature signal. |
| D– | Analog remote sensor input | Negative terminal of external diode; completes remote sensing path and enables series resistance cancellation. |
| THERM | Digital output | Open-drain thermal alert flag (active low); configurable as hardware shutdown trigger for critical overtemperature events. |
| GND | Ground reference | Analog and digital common return; must be low-impedance connection to minimize measurement noise coupling. |
| ALERT/THERM2 | Digital output | Reconfigurable open-drain alert output; provides second independent thermal event signal or general-purpose interrupt. |
| SDA | Bidirectional data line | SMBus/I²C serial data; requires external pull-up to V+; supports multi-master arbitration and clock stretching. |
| SCL | Digital input | SMBus/I²C serial clock; open-drain input requiring external pull-up; defines timing for all bus transactions. |
Key Features
| Feature | Design Value |
|---|---|
| Series Resistance Cancellation | Compensates for PCB trace resistance up to 3 kΩ on D+/D– lines, preserving ±1°C remote accuracy without layout constraints. |
| Programmable N-Factor | Adjusts ideality factor (η) to match specific diode characteristics (default η = 1.008), correcting for process variation in embedded transistors. |
| User-Defined Offset Register | Enables per-unit system-level calibration to eliminate board-level thermal gradients and sensor-to-sensor mismatch. |
| Diode Fault Detection | Automatically identifies open-circuit, short-circuit, or reversed diode connections - prevents false temperature reporting in field deployments. |
| Programmable Threshold Limits | Configurable high/low limits per channel with status flag and ALERT/THERM2 assertion - enables autonomous thermal throttling without host intervention. |
Applications
| Rack Server Motherboard Thermal Monitoring | Smart Network Interface Card (NIC) |
|---|---|
|
Use Scenario: Real-time monitoring of CPU, memory, and PCIe switch junction temperatures in 1U/2U data center servers. IC Role / Device Role / Timing Role: Dual-channel sensor providing synchronized local (on-die) and remote (processor diode) readings via SMBus at 0.0625–8 Hz update rates. Use Value: Enables dynamic fan control and thermal throttling with ±1°C accuracy, reducing acoustic noise while maintaining safe operating margins. |
Use Scenario: Thermal protection of FPGA-based packet processing engines and high-speed SerDes in enterprise NICs. IC Role / Device Role / Timing Role: Local sensor tracks ambient board temperature; remote channel reads FPGA diode output for core junction estimation. Use Value: Prevents thermal runaway during sustained 10G/25G traffic bursts by triggering THERM shutdown before silicon damage occurs. |
| Small Cell Base Station | Processor and FPGA Temperature Monitoring |
|
Use Scenario: Ambient and RF power amplifier die temperature tracking in outdoor 4G/5G small cell units with wide temperature swing (-40°C to +85°C). IC Role / Device Role / Timing Role: Remote channel interfaces with PA transistor diode; local channel monitors enclosure air temperature for compensation. Use Value: Maintains ±1°C accuracy across full industrial range, enabling stable RF output power calibration without manual recalibration. |
Use Scenario: Embedded thermal supervision in Xilinx/Intel FPGA carrier cards and ARM-based SoM modules. IC Role / Device Role / Timing Role: Provides I²C-accessible local + remote temperature data to host firmware for adaptive voltage/frequency scaling (AVS/DFS). Use Value: Supports JTAG-less thermal validation and runtime margining, reducing test time and improving yield in high-volume production. |
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 |
|---|---|---|---|
| ADT7461A | Pin- and register-compatible; identical VSSOP-8 footprint and SMBus protocol; ±2.5°C local accuracy (worse than TMP411ADR's ±1°C). | Lower accuracy limits use in high-precision thermal closed-loop control; suitable for cost-sensitive legacy designs where ±2.5°C is acceptable. | Select ADT7461A only if existing firmware relies on its specific revision ID or if long-term ADI supply continuity is prioritized over accuracy. |
| TMP451 | Narrower supply range (1.7V–3.6V); ±2°C local accuracy; SOT-23-8 package (2.9 mm × 2.8 mm); lower quiescent current (1.5 µA avg @ 0.0625Hz). | Optimized for battery-powered or ultra-low-power applications; incompatible with 5V systems and lacks VSSOP-8 mechanical fit. | Choose TMP451 only for portable/embedded designs requiring sub-2 µA average current and 1.7V operation - not a drop-in replacement for TMP411ADR. |
Compared with ADT7461A and TMP451, the TMP411ADR delivers superior ±1°C local/remote accuracy in a VSSOP-8 package with full 2.7V–5.5V support, making it optimal for enterprise server and infrastructure thermal management where precision and 5V compatibility are mandatory.
Availability
TMP411ADR is available at Aetrix Electronics and suitable for rack server motherboard thermal monitoring, smart NIC thermal protection, and small cell base station temperature supervision requiring stable component supply and long-lifecycle support.
Supply support for TMP411ADR 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 specializing in analog, embedded processing, and connectivity technologies with broad industrial and enterprise design expertise.
The TMP411ADR belongs to TI's precision temperature sensor product line, engineered specifically for high-accuracy thermal monitoring in data center, networking, and communications infrastructure equipment.
FAQ
What is the maximum remote temperature measurement range supported by the TMP411ADR?
The TMP411ADR supports remote temperature measurement from –40°C to +150°C at the diode sensor (TDIODE), validated across its full operating ambient range of –40°C to +125°C. This extended range enables reliable thermal monitoring of high-power components such as RF amplifiers and GPU cores where junction temperatures exceed 100°C.
Does the TMP411ADR require external calibration to achieve ±1°C accuracy?
No, the TMP411ADR achieves ±1°C local and remote accuracy over 15°C to 85°C without system-level calibration. Its on-chip series resistance cancellation, programmable N-factor (η = 1.008), and factory-trimmed offset registers eliminate the need for external calibration - though user-defined offset registers allow optional fine-tuning for board-specific thermal gradients.
Can the TMP411ADR operate from a 1.8V supply rail?
No, the TMP411ADR requires a minimum supply voltage of 2.7V and is not rated for 1.8V operation. For 1.8V-compatible alternatives, consider the TMP411D variant (1.62V–5.5V) or TMP451 (1.7V–3.6V), but note these differ in package, accuracy, and register compatibility - neither is a direct substitute for the TMP411ADR.
How does the TMP411ADR handle diode connection faults?
The TMP411ADR includes integrated diode fault detection that identifies open-circuit, short-circuit, and reversed diode conditions on the D+/D– inputs. When detected, it sets the Diode Fault bit in the Status Register and disables remote temperature reporting - preventing erroneous thermal decisions in mission-critical systems like rack servers and base stations.
Is the TMP411ADR pin-compatible with the ADT7461 and ADM1032?
Yes, the TMP411ADR is explicitly designed for pin and register compatibility with ADT7461 and ADM1032 devices in VSSOP-8 and SOIC-8 packages. This enables direct hardware replacement and firmware reuse in legacy thermal management designs, provided the ±1°C accuracy and 2.7V–5.5V supply requirements align with system specifications.
TMP411ADR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-SOIC
TMP411ADR FAQ
1.How can I place an order for TMP411ADR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP411ADR 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 TMP411ADR reliable?
The price and inventory of TMP411ADR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP411ADR is usually 5 days.
3.What payment methods are accepted for TMP411ADR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP411ADR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP411ADR?
TMP411ADR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP411ADR 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 TMP411ADR?
For technical support, including TMP411ADR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP411ADR requirements.
6.How does Aetrix verify that TMP411ADR is sourced from the original manufacturer or authorized distributors?
All TMP411ADR 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 TMP411ADR meets industry standards.
7.What is the process for return or replacement of TMP411ADR?
All TMP411ADR units undergo pre-shipment inspection (PSI). If there is an issue with TMP411ADR, 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 TMP411ADR part is unused and in its original packaging.
Return procedure for TMP411ADR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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