TMP411CQDGKRQ1 - ±1C Remote/Local Temp Sensor AEC-Q100 | TI
MPN: TMP411CQDGKRQ1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.05 | $2.05 |
| 10 | $1.8 | $18.00 |
| 100 | $1.55 | $155.00 |
| 500 | $1.35 | $675.00 |
| 1,000 | $1.18 | $1,180.00 |
Drop-in alternatives for TMP411CQDGKRQ1 — 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:
TMP411AQDGKRQ1
✅ Drop-In✓ In Stock
$1.36 / Unit
View Datasheet →TMP411BDGKR
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →TMP411CDGKR
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
TMP411BQDGKRQ1
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
TMP411CQDGKRQ1 Maximum Ratings & Electrical Characteristics
| Sensor Type | Remote and Local Temperature Sensor |
| Remote Accuracy | +/-1 C |
| Resolution | 11 bit |
| Interface | 2-Wire Serial (I2C, SMBus) |
| Operating Temperature Range | -40 C to +125 C |
| Special Features | N-Factor and Series Resistance Correction |
| Qualification | Automotive, AEC-Q100 |
| Package | 8-VSSOP (DGK) |
| Mounting Type | Surface Mount |
| Output Type | Digital, Serial |
| Alert Outputs | ALERT and THERM |
| Remote Sensor Type | Diode-connected NPN/PNP transistor |
| Part Marking | 411CQ |
| Packaging | Tape & Reel (T/R) |
| RoHS Status | Compliant |
TMP411CQDGKRQ1 Pin Configuration
| Pin 1 | D+ — Remote temperature sensor positive input (diode-connected transistor anode) |
| Pin 2 | D- — Remote temperature sensor negative input (diode-connected transistor cathode) |
| Pin 3 | ALERT — Over-temperature alert interrupt output (open-drain) |
| Pin 4 | GND — Ground |
| Pin 5 | SDA — 2-wire serial data (I2C/SMBus) |
| Pin 6 | SCL — 2-wire serial clock (I2C/SMBus) |
| Pin 7 | THERM — THERM over-temperature/turboboost output (open-drain) |
| Pin 8 | V+ — Power supply, decouple with 0.1 uF to GND |
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
TMP411CQDGKRQ1 is suitable for 6 applications: FPGA and Processor Thermal Monitoring, Automotive ECU and Infotainment Thermal Supervision, Server and Datacenter Board-Level Monitoring, Networking and Telecom Equipment, Industrial Automation and Motor Drives, Test and Measurement Instrumentation.
FPGA and Processor Thermal Monitoring
The TMP411CQDGKRQ1 fits FPGA and microprocessor die-temperature monitoring because its remote channel reads the diode-connected transistor embedded in these dies with ±1 degrees C accuracy, and its N-factor correction compensates for different manufacturers' process transistors, per TI's TMP411-Q1 product data. In a typical design the D+/D- pins connect directly to the FPGA's remote diode pins, while the 2-wire I2C/SMBus interface reports 11-bit temperature to the system controller. The series resistance correction cancels PCB trace resistance errors, allowing the sensor to sit several centimeters from the die. The THERM output can trigger throttling directly, protecting silicon before software intervention is required.
Recommended
Automotive ECU and Infotainment Thermal Supervision
In automotive ECUs and infotainment head units, the TMP411CQDGKRQ1 is used because its AEC-Q100 qualification and -40 C to +125 C operating range meet automotive environmental requirements, while ±1 degrees C remote accuracy gives the thermal management ECU a trustworthy reading of the SoC or graphics processor junction temperature. The ALERT and THERM outputs provide hardware-level over-temperature interrupts and throttling signals that keep functioning even if the main MCU hangs. The 2-wire SMBus interface integrates with the vehicle's existing low-speed digital infrastructure, and N-factor correction adapts the sensing to the specific processor die used in each vehicle platform variant.
Recommended
Server and Datacenter Board-Level Monitoring
Datacenter and server baseboards use the TMP411CQDGKRQ1 to monitor CPU, GPU, and ASIC temperatures through their on-die thermal diodes. The 11-bit resolution (nominally 0.125 degrees C steps in the family) supports fine-grained fan-control curves, and the series resistance correction tolerates the longer D+/D- routing typical of large server boards. Multiple TMP411 sensors share a single SMBus segment, letting a BMC (board management controller) poll dozens of thermal points; the ALERT pin supports SMBus alert protocol for low-latency fault reporting. The 8-VSSOP (DGK) small footprint allows placement directly adjacent to high-power devices where gradients are steepest.
Recommended
Networking and Telecom Equipment
Networking switches, routers, and telecom line cards generate concentrated heat in ASICs and optics that must be monitored continuously. The TMP411CQDGKRQ1's remote diode sensing reads these dies with ±1 degrees C accuracy while its local channel tracks board ambient temperature in the same 8-VSSOP package, reducing BOM count versus discrete solutions. The programmable conversion rate lets designers trade bus traffic against update speed, and the THERM output can directly gate fan controllers or throttle the line-card ASIC. Although the standard grade is industrial rather than extended-temperature, the -40 C to +125 C range covers most central-office and outdoor-enclosure board environments.
Recommended
Industrial Automation and Motor Drives
Industrial drives, PLCs, and power modules benefit from the TMP411CQDGKRQ1's ability to monitor both the control processor junction temperature (remote channel) and the local PCB temperature near power stages (local channel) with a single IC. The -40 C to +125 C range suits factory-floor ambient extremes, and AEC-Q100 qualification provides headroom for reliability-critical industrial equipment that borrows automotive-grade components. The ALERT output wires into the drive's safety shutdown logic, while the I2C/SMBus interface feeds temperature data to predictive-maintenance software. Series resistance correction keeps readings accurate even with wiring parasitics in noisy inverter environments.
Recommended
Test and Measurement Instrumentation
Bench instruments, modular PXI/ePCI chassis, and environmental chambers use the TMP411CQDGKRQ1 to log processor and board temperatures during self-test and calibration routines. The 11-bit digital output removes analog front-end calibration burden, and the N-factor and series resistance correction registers allow the same PCB to support different monitored dies without redesign - useful across instrument product families. The SMBus-compatible interface connects directly to the instrument's housekeeping microcontroller, and the ALERT output supports hard fault interruption. The small 8-VSSOP (DGK) footprint simplifies placement in dense measurement backplanes.
Recommended
Recommended Products Summary
Engineering reference data for TMP411CQDGKRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TMP411AQDGKRQ1 | TMP411BDGKR | TMP411CDGKR | TMP411BQDGKRQ1 |
|---|---|---|---|---|---|
| Package | 8-VSSOP (DGK) | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Remote Accuracy | +/-1 C | +/-1 C | +/-0.8 C | +/-1 C | +/-0.8 C |
| AEC-Q100 Qualification | Qualified (automotive Q1) | Qualified (automotive Q1) | Not qualified (commercial) | Not qualified (commercial) | Qualified (automotive Q1) |
| Resolution | 11 bit | 11 bit | 12 bit | 11 bit | 12 bit |
| Interface | 2-wire I2C/SMBus | 2-wire I2C/SMBus | 2-wire I2C/SMBus | 2-wire I2C/SMBus | 2-wire I2C/SMBus |
| 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 +125 C |
| N-Factor / Series-R Correction | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Automotive AEC-Q100 qualification (vs TMP411BDGKR)
- Lower cost with same accuracy in commercial builds (vs TMP411BQDGKRQ1)
- N-factor and series resistance correction (vs Generic local-only sensors)
Design Notes
Route D+ and D- as a closely coupled, equal-length differential pair from the TMP411CQDGKRQ1 to the remote transistor pins. Keep total trace length under a few centimeters where possible; the series resistance correction register cancels residual resistance, but only up to the limit specified in the datasheet. Do not route D+/D- adjacent to clock or switching-regulator nets, and place the 0.1 uF V+ decoupling capacitor within 2 mm of pin 8.
The remote transistor N-factor must match the correction register setting for the monitored die; using the default value with a non-typical process transistor shifts remote readings. Also confirm the correct TMP411 variant is populated - the C version is ±1 degrees C while the B/D versions are ±0.8 degrees C, and the Q1 suffix denotes automotive grade. Mixing these on one BOM line causes silent accuracy regressions.
Pull up SDA, SCL, ALERT, and THERM to the appropriate rail with resistors per the datasheet recommendation (typically 1-10 kohm for SMBus loads) because all four are open-drain. On long SMBus segments with several sensors, keep bus capacitance below the SMBus 400 pF limit and consider an SMBus-compliant buffer. Add a small RC filter at ALERT if it drives a noisy digital input near switching circuitry.
Compliance Information
AEC-Q100 automotive qualification stated in datasheets.com and TI product data. RoHS and lead-free status per TI standard product data; REACH and halogen-free status not stated in provided data.
