TMP411ADGKR - ±1°C Remote/Local Temp Sensor | TI | I2C/SMBus
MPN: TMP411ADGKR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.75 | $0.75 |
| 10 | $0.68 | $6.80 |
| 100 | $0.55 | $55.00 |
| 500 | $0.46 | $230.00 |
| 1,000 | $0.38 | $380.00 |
Drop-in alternatives for TMP411ADGKR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TMP411BDGKR
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →TMP411CDGKR
✅ Drop-In📋 Reference alternative (not in catalog)
TMP411AQDGKRQ1
✅ Drop-In✓ In Stock
$1.36 / Unit
View Datasheet →TMP411CQDGKRQ1
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →ADT7461ARMS
✅ Drop-In📋 Reference alternative (not in catalog)
ADT7461ARMSZ
✅ Drop-In📋 Reference alternative (not in catalog)
TMP411ADGKR Maximum Ratings & Electrical Characteristics
| Sensor Type | Remote and Local Digital Temperature Sensor |
| Local Accuracy | ±1°C (max, 45°C to 85°C per datasheet typical band) |
| Remote Accuracy | ±1°C (TMP411 family, A version) |
| Resolution | 11-bit (0.125°C in extended mode) |
| Operating Temperature Range | -40°C to +125°C |
| Supply Voltage Min | 2.7 V |
| Interface | 2-Wire, I2C, SMBus |
| Number of Remote Channels | 1 (diode-connected NPN/PNP) |
| Alert Output | Yes (ALERT, open-drain) |
| N-Factor Correction | Yes (programmable) |
| Series Resistance Cancellation | Yes |
| Offset Registers | Yes (system calibration) |
| Package | 8-VSSOP (DGK) |
| Mounting Type | Surface Mount |
| Compatibility | Pin and register compatible with ADT7461 |
| RoHS Status | Compliant |
TMP411ADGKR Pin Configuration
| Pin 1 | DXP — Remote diode positive sense input (connect to remote thermal diode anode) |
| Pin 2 | DXN — Remote diode negative sense input (connect to remote thermal diode cathode) |
| Pin 3 | ALERT — Alert interrupt output, open-drain, out-of-limit temperature indicator |
| Pin 4 | GND — Ground |
| Pin 5 | THERM — Therm alarm output / overtemperature limit indicator |
| Pin 6 | ADD — Address select pin for SMBus/I2C slave address |
| Pin 7 | SDA — Serial data line for two-wire SMBus/I2C interface |
| Pin 8 | V+ — Power supply, 2.7 V minimum (3.3 V typical) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TMP411ADGKR is suitable for 6 applications: CPU/GPU Thermal Monitoring, Server and Datacenter Thermal Management, FPGA Thermal Supervision, Telecom Base Station Power Monitoring, Industrial Automation Controllers, Networking Switch Line Cards.
CPU/GPU Thermal Monitoring
The TMP411ADGKR is purpose-built to monitor the on-die thermal diode of CPUs and GPUs, delivering ±1°C die-level accuracy that board-level sensors cannot achieve because they measure PCB temperature rather than silicon junction temperature. The remote channel connects DXP/DXN directly to the processor's thermal diode pins, while the 11-bit resolution (0.125°C steps) supports fine-grained fan-speed control and thermal throttling decisions. The ALERT output provides interrupt-driven protection, and series resistance cancellation tolerances normal PCB trace resistance in the remote path, keeping accuracy intact even when the sensor sits centimeters away from the processor on a server motherboard.
Recommended
Server and Datacenter Thermal Management
In server baseboards, the TMP411ADGKR interfaces to the baseboard management controller (BMC) over SMBus, allowing out-of-band monitoring of processor and FPGA die temperatures for fan control and thermal-shutdown policy. Its 2.7 V minimum supply fits standard 3.3 V management rails, and the SMBus timeout detection prevents a hung bus from freezing the monitoring chain. Because the device is pin and register compatible with the ADT7461, server platforms can dual-source the sensor without firmware changes. Multiple address options via the ADD pin allow several TMP411 devices on one management bus covering different processor zones.
Recommended
FPGA Thermal Supervision
Modern FPGAs integrate diode-connected transistors on the die precisely so external monitors can read junction temperature; the TMP411ADGKR reads these diodes with ±1°C accuracy, enabling dynamic power-management and junction-temperature derating logic. The 11-bit output gives the FPGA supervisor fine temperature granularity for adjusting operating points before thermal limits are reached. Series resistance cancellation maintains accuracy across the long, routed DXP/DXN traces typical of FPGA floors, while N-factor correction is programmed to match the specific process diode characteristic recommended by the FPGA vendor's thermal management guide.
Recommended
Telecom Base Station Power Monitoring
Base station power amplifiers and RF boards require tight thermal monitoring to protect linearity and reliability; the TMP411ADGKR supervises both the local board temperature and the remote die temperature of bias controllers or PA modules with a single IC. Its -40°C to +125°C industrial range covers outdoor cabinet environments, and the open-drain ALERT output integrates with the site controller's interrupt scheme. The SMBus two-wire interface shares the existing management bus without extra wiring, and offset registers allow one-point system calibration against an external reference to squeeze system-level accuracy below the standalone ±1°C specification.
Recommended
Industrial Automation Controllers
Industrial control cabinets expose electronics to wide ambient swings, and the TMP411ADGKR monitors both ambient (local channel) and hot-spot (remote channel) temperatures from one 8-pin device. With a 2.7 V minimum supply it runs from standard 3.3 V controller rails, and the fault-queued ALERT output prevents nuisance trips from single out-of-limit readings in electrically noisy motor-drive environments. The 11-bit resolution supports trending and predictive-maintenance algorithms running on the PLC. Because the part is register-compatible with the ADT7461, existing industrial firmware stacks port with minimal modification when qualifying second sources.
Recommended
Networking Switch Line Cards
High-port-count switch line cards concentrate many hot devices, and the TMP411ADGKR provides per-card thermal telemetry over the SMBus backplane interface, letting the switch fabric controller balance airflow dynamically. The ADD pin's address selection allows several sensors per management bus, one per phy or processor zone. Remote diode sensing reaches the ASIC die temperature with ±1°C accuracy, which is essential because air-side board temperature can differ from silicon temperature by tens of degrees under load. Its small 8-VSSOP footprint fits the dense line-card layout without consuming valuable board area near the signal path.
Recommended
Recommended Products Summary
Engineering reference data for TMP411ADGKR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TMP411BDGKR | TMP411CDGKR | TMP411AQDGKRQ1 | ADT7461ARMS |
|---|---|---|---|---|---|
| Package | 8-VSSOP (DGK) | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | 8-MSOP - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Remote Accuracy | ±1°C | ±0.75°C class (B grade) | [DATA_NEEDED] | ±1°C (A grade) | ±1°C (typical) |
| Resolution | 11-bit | 11-bit | 11-bit | 11-bit | 11-bit |
| 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 (typical) |
| Interface | I2C/SMBus (2-wire) | I2C/SMBus (2-wire) | I2C/SMBus (2-wire) | I2C/SMBus (2-wire) | SMBus/I2C (2-wire) |
| N-Factor Correction | Yes | Yes | Yes | Yes | Yes |
| Automotive Qualification | No (standard grade) | No | No | Yes (AEC-Q100 Q1) | No |
| Price (qty 1, approx.) | $0.75 as of 2026-09-02 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Programmable N-factor correction adapts to any remote diode (vs TMP75AIDGKR)
- Series resistance cancellation preserves accuracy on long traces (vs ADT7461ARMS)
- Cross-brand second source availability (vs ADT7461ARMSZ)
Design Notes
Route DXP and DXN as a closely coupled differential pair with minimal length to the remote thermal diode; add a 2.2 nF differential capacitor at the diode pins as recommended in the TI TMP411 datasheet typical application to filter noise pickup. The device tolerates series resistance via its cancellation feature, but avoid routing DXP/DXN alongside switching-regulator nodes or high-current traces to prevent coupling errors into the ±1°C remote measurement.
Decouple V+ with a 0.1 µF ceramic capacitor placed within a few millimeters of pin 8, plus a bulk 1 µF capacitor per board. Supply noise on the 3.3 V rail can alias into the ADC; the 2.7 V minimum supply leaves little margin below 3.3 V rails that sag during brownout conditions, so verify rail regulation. Estimated: at typical sub-mA quiescent current, self-heating from the sensor die is below 0.1°C and does not materially affect local accuracy.
Select the ADD pin level carefully: multiple sensors on one SMBus require distinct addresses, and two devices strapped identically will collide on the bus. Ensure the remote diode matches an N-factor value the programmable register supports (typical CPU/FPGA diodes are N=1.008); using an unspecified diode type degrades the ±1°C accuracy. When substituting the ADT7461, verify that any use of vendor-specific register extensions in your firmware is portable across both register maps.
Compliance Information
RoHS compliant per TI product page and distributor listings. Not AEC-Q100 qualified - use TMP411AQDGKRQ1 for automotive applications.
