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Texas Instruments TMP6331QDYATQ1
- Part No.:
- TMP6331QDYATQ1
- Manufacturer:
- Texas Instruments
- Category:
- PTC Thermistors
- Package:
- SC-79, SOD-523
- Datasheet:
-
TMP6331QDYATQ1.pdf
- Description:
- SENSOR PTC 100KOHM 1% SOT5X3
- Quantity:
- Payment:
- Shipping:
Inventory:1,007
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Product details
Overview
TMP6331QDYATQ1 from Texas Instruments is an AEC-Q100 Grade-0 qualified silicon linear PTC thermistor in SOT-5X3 (DYA) package, delivering 100-kΩ nominal resistance at 25 °C with ±1% tolerance (0 °C to 70 °C), +6400 ppm/°C TCR at 25 °C, and 0.2% typical TCR tolerance across –40 °C to 150 °C - used for high-accuracy thermal monitoring in automotive on-board chargers and motor control units.
For engineers reviewing the TMP6331QDYATQ1 datasheet, TMP6331QDYATQ1 pinout, TMP6331QDYATQ1 application, or TMP6331QDYATQ1 equivalent, key selection criteria include its 150 °C operating range in DYA package, built-in fail-safe behavior under short-circuit conditions, low long-term drift (±0.2% after 1000 h at 150 °C), and compatibility with ratiometric voltage-divider or precision current-source biasing circuits.
Technical Context
The TMP6331QDYATQ1 operates as a two-terminal, voltage- or current-biased resistive temperature sensor with strictly linear positive temperature coefficient behavior. Its resistance increases uniformly with temperature, eliminating need for external linearization circuitry or midpoint calibration required by NTCs.
It functions exclusively within recommended conditions: 0–5.5 V across terminals, ≤40 µA sense current, and –40 °C to 150 °C ambient for the DYA package. Thermal response time is 0.6 s in stirred liquid and 3.2 s in still air, enabled by low thermal mass and 0.80 mm × 1.20 mm footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| R25 | 100 kΩ at 25 °C - defines baseline resistance for temperature calculation and voltage-divider design |
| R25 Tolerance | ±1% (0 °C to 70 °C) - enables <1 °C absolute error without per-unit calibration in mid-range applications |
| TCR at 25 °C | +6400 ppm/°C - provides stable 6.4 mΩ/°C slope per kΩ, supporting simple linear conversion algorithms |
| Operating Range | –40 °C to 150 °C (DYA package) - supports under-hood and powertrain thermal sensing in automotive Grade-0 systems |
| Thermal Response | 0.6 s (stirred liquid) - allows rapid detection of transient overtemperature events in battery or converter modules |
| Long-Term Drift | ±0.2% after 1000 h at 150 °C - ensures <0.5 °C measurement shift over 10+ years in continuous high-temp operation |
| ESD Rating | HBM ±2000 V, CDM ±1000 V - meets AEC-Q100-002/-011 for robustness in automotive assembly and field environments |
Pinout & Package
The TMP6331QDYATQ1 uses a 2-pin SOT-5X3 (DYA) package measuring 0.80 mm × 1.20 mm, optimized for 0603-compatible PCB footprints and high-density automotive layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–) | Thermistor terminal (negative polarity) | Must be held at lower voltage potential than Pin 2; reverse bias risks parametric shift or damage |
| 2 (+) | Thermistor terminal (positive polarity) | Higher-voltage node in bias network; determines direction of current flow and sign of VTEMP output |
Key Features
| Feature | Design Value |
|---|---|
| Linear PTC response | Eliminates need for lookup tables or polynomial fitting - enables direct VTEMP = m·T + b conversion in MCU firmware |
| Built-in fail-safe | Self-limiting resistance rise during short-to-supply prevents thermal runaway - no external protection circuitry required |
| Ratiometric compatibility | Voltage-divider output cancels VBIAS tolerance when tied to ADC reference - achieves <0.3 °C system accuracy without precision regulators |
| Low self-heating | Max 40 µA sense current and 5.5 V max bias limit power dissipation to <220 µW - reduces measurement error to <0.1 °C at 125 °C |
| AEC-Q100 Grade-0 | Qualified for –40 °C to 150 °C operation - certified for critical powertrain and charging systems per automotive reliability standards |
Applications
| Display Backlight Thermal Compensation | Battery Management System (BMS) Cell Monitoring |
|---|---|
Use Scenario: Compensating LED brightness drift caused by display module temperature rise during infotainment operation. IC Role / Device Role / Timing Role: Two-terminal linear thermistor providing analog voltage output proportional to local PCB temperature near backlight driver IC. Use Value: Enables real-time luminance correction using simple MCU ADC sampling - avoids costly NTC linearization hardware and firmware overhead. | Use Scenario: Monitoring individual Li-ion cell temperature in high-voltage traction battery packs during charge/discharge cycles. IC Role / Device Role / Timing Role: Surface-mount thermistor placed directly on cell tab or busbar to capture fast thermal transients with 0.6 s liquid-response time. Use Value: Supports accurate cell balancing decisions and thermal cutoff activation within 1 °C tolerance - critical for ASIL-B functional safety compliance. |
| Motor Control Inverter Junction Sensing | On-Board Charger (OBC) Power Stage Monitoring |
Use Scenario: Detecting IGBT/module junction temperature rise during high-load EV traction motor operation. IC Role / Device Role / Timing Role: Thermistor mounted on heatsink near power stage to infer junction temperature via calibrated thermal resistance model. Use Value: Enables dynamic derating before thermal shutdown - extends inverter lifetime and avoids torque interruption during aggressive driving. | Use Scenario: Real-time thermal monitoring of SiC MOSFETs and gate drivers in 11 kW OBC power stages during AC fast charging. IC Role / Device Role / Timing Role: DYA-packaged TMP6331QDYATQ1 placed adjacent to power semiconductor die to track localized hot spots up to 150 °C. Use Value: Provides fail-safe foldback control signal to reduce switching frequency before thermal limit breach - maintains OBC uptime and prevents catastrophic failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear thermistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP6131QDYATQ1 | 10-kΩ R25, same DYA package, identical Grade-0 rating and TCR profile | Better suited for low-resistance bias networks or higher-current sensing where 100-kΩ causes excessive ADC settling time | Select when system bias current >40 µA is impractical or when legacy 10-kΩ NTC designs require drop-in replacement with linear behavior |
| TMP6431QDYATQ1 | 47-kΩ R25, same DYA package, identical Grade-0 rating and TCR profile | Offers intermediate impedance for systems needing reduced self-heating vs. 100-kΩ but higher sensitivity than 10-kΩ | Select when optimizing trade-off between ADC resolution, noise immunity, and power consumption in constrained 3.3 V systems |
Compared with TMP6131QDYATQ1 and TMP6431QDYATQ1, the TMP6331QDYATQ1 provides highest base resistance for maximum voltage swing in 5 V systems, enabling best signal-to-noise ratio without gain stages - ideal for cost-sensitive automotive modules where ADC resolution is limited to 10–12 bits.
Availability
TMP6331QDYATQ1 is available at Aetrix Electronics and suitable for automotive on-board chargers, motor control inverters, and battery management systems requiring stable component supply with AEC-Q100 Grade-0 qualification and long-term thermal reliability.
Supply support for TMP6331QDYATQ1 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 company specializing in analog, embedded processing, and automotive-grade silicon solutions with over 90 years of innovation in precision sensing and power management.
The TMP63-Q1 product line delivers automotive-qualified linear PTC thermistors designed specifically for high-reliability thermal monitoring in powertrain, charging, and ADAS subsystems - replacing legacy NTCs with simplified signal chains and enhanced safety margins.
FAQ
What is the maximum operating temperature for the TMP6331QDYATQ1?
The TMP6331QDYATQ1 is rated for continuous operation from –40 °C to +150 °C when assembled in the SOT-5X3 (DYA) package, meeting AEC-Q100 Grade-0 requirements for under-hood and power electronics applications. This rating is validated per TI's SNIS215C datasheet revision C and confirmed in the Device Comparison Table and Recommended Operating Conditions section.
Does the TMP6331QDYATQ1 require external linearization circuitry?
No, the TMP6331QDYATQ1 does not require external linearization circuitry. Its silicon-based linear PTC characteristic produces a highly consistent resistance-vs-temperature curve across –40 °C to 150 °C, enabling direct linear conversion (e.g., VTEMP = m·T + b) in firmware. This eliminates the need for parallel resistors, lookup tables, or polynomial fitting typically required with NTC thermistors.
How is the TMP6331QDYATQ1 protected against short-circuit failures?
The TMP6331QDYATQ1 incorporates built-in fail-safe behavior: during a short-to-supply condition, rising current causes self-heating, and its positive temperature coefficient (PTC) increases resistance - inherently limiting further current and power dissipation. This contrasts with NTCs, which would decrease resistance and enter thermal runaway. This feature is documented in Section 7.3.4 "Built-In Fail Safe" of the SNIS215C datasheet.
What is the long-term resistance stability of the TMP6331QDYATQ1?
The TMP6331QDYATQ1 exhibits ±0.2% typical long-term resistance drift after 1000 hours of continuous operation at 150 °C and 5.5 V bias, as specified in Section 6.5 "Electrical Characteristics" of the SNIS215C datasheet. This stability supports >10-year field life in automotive power modules without recalibration.
Can the TMP6331QDYATQ1 be used with a voltage divider configuration?
Yes, the TMP6331QDYATQ1 is fully compatible with voltage divider biasing. When the bias voltage (VBIAS) is tied to the ADC reference voltage, the system becomes ratiometric - canceling VBIAS tolerance and achieving <0.3 °C total accuracy. The recommended top resistor is 100 kΩ, matching the device's R25 value to maximize output voltage range and linearity, per Section 8.2.1.2 of the datasheet.
TMP6331QDYATQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Resistance @ 25°C:
- 100 kOhms
- Resistance Tolerance:
- ±1%
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Power - Max:
- -
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- SOT-5X3
TMP6331QDYATQ1 FAQ
1.How can I place an order for TMP6331QDYATQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP6331QDYATQ1 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 TMP6331QDYATQ1 reliable?
The price and inventory of TMP6331QDYATQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP6331QDYATQ1 is usually 5 days.
3.What payment methods are accepted for TMP6331QDYATQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP6331QDYATQ1 transactions.
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4.How is shipping managed for TMP6331QDYATQ1?
TMP6331QDYATQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP6331QDYATQ1 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 TMP6331QDYATQ1?
For technical support, including TMP6331QDYATQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP6331QDYATQ1 requirements.
6.How does Aetrix verify that TMP6331QDYATQ1 is sourced from the original manufacturer or authorized distributors?
All TMP6331QDYATQ1 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 TMP6331QDYATQ1 meets industry standards.
7.What is the process for return or replacement of TMP6331QDYATQ1?
All TMP6331QDYATQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TMP6331QDYATQ1, 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 TMP6331QDYATQ1 part is unused and in its original packaging.
Return procedure for TMP6331QDYATQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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