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Texas Instruments TMP390AQDRLTQ1
- Part No.:
- TMP390AQDRLTQ1
- Manufacturer:
- Texas Instruments
- Category:
- Thermostats - Solid State
- Package:
- SOT-563, SOT-666
- Datasheet:
-
TMP390AQDRLTQ1.pdf
- Description:
- DUAL TRIP TEMPERATURE SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:528
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Product details
Overview
TMP390AQDRLTQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified, ultra-low-power (0.5 µA typical), dual-channel resistor-programmable temperature switch with independent hot (Channel A: +30°C to +124°C) and cold (Channel B: –50°C to +25°C) trip detection, open-drain outputs, and programmable hysteresis (5°C/10°C/20°C). It enables thermal protection in automotive infotainment, radar, and camera modules.
For engineers reviewing the TMP390AQDRLTQ1 datasheet, TMP390AQDRLTQ1 pinout, TMP390AQDRLTQ1 application, or TMP390AQDRLTQ1 equivalent, key selection factors include its ±1.5°C accuracy (0°C to +70°C), SOT-563 (1.60 mm × 1.20 mm) package, resistor-programmable thresholds without calibration, trip test function for in-system manufacturing validation, and functional safety documentation support.
Technical Context
The TMP390AQDRLTQ1 implements a dual independent thermal sensing architecture: Channel A monitors overtemperature events using a SETA-pin resistor (1.05 kΩ–909 kΩ), while Channel B monitors undertemperature events via SETB (10.5 kΩ–909 kΩ), which also selects hysteresis mode (5°C, 10°C, or 20°C when SETB = GND). Both channels operate across –55°C to +130°C with no calibration required.
Its open-drain outputs (OUTA/OUTB) interface directly with microcontrollers or logic systems, supporting pull-up voltages up to VDD + 0.3 V. The device performs temperature sampling every 0.5 s with 0.65 ms conversion time, remains in ultra-low-power standby between conversions, and includes a dedicated trip test mode that forces output activation by asserting logic high on SETA or SETB-enabling board-level functional testing without thermal chambers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 1.62 V to 5.5 V - supports direct connection to common automotive rails (e.g., 3.3 V, 5 V) without LDO. |
| Quiescent current | 0.5 µA typical at 25°C - enables always-on thermal monitoring in battery-sensitive automotive subsystems. |
| Channel A trip range | +30°C to +124°C in 2°C steps - covers critical hot-swap, processor throttling, and power stage overtemp thresholds. |
| Channel B trip range | –50°C to +25°C in 5°C steps - supports cold-start detection, ambient sensor fault monitoring, and low-temp system enablement. |
| Accuracy | ±1.5°C max (0°C to +70°C); ±3.0°C max (–55°C to +130°C) - eliminates need for factory calibration in most automotive applications. |
| Hysteresis options | 5°C, 10°C, or 20°C (Channel A only) - prevents output chatter near trip points under noisy thermal gradients. |
| Operating temp range | –40°C to +125°C (Grade 1); extended –55°C to +130°C - meets AEC-Q100 requirements for under-hood and cabin electronics. |
Pinout & Package
SOT-563 (6-pin) package, 1.60 mm × 1.20 mm body size, 0.5-mm pitch - optimized for space-constrained automotive PCBs with high thermal reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SETA | Input | Resistor-programmed hot-trip threshold (Channel A); floating or grounded disables OUTA. |
| 2 - SETB | Input | Resistor-programmed cold-trip threshold (Channel B) and hysteresis selector; grounded enables 20°C hysteresis on Channel A. |
| 3 - GND | Ground | Reference node for internal circuitry and external resistor networks; must be low-impedance. |
| 4 - OUTB | Logic Output | Open-drain active-low output for cold-trip detection; requires external pull-up; can be left floating if unused. |
| 5 - VDD | Supply | Primary power input (1.62–5.5 V); powers internal bandgap, ADC, and logic; POR threshold = 1.5 V. |
| 6 - OUTA | Logic Output | Open-drain active-low output for hot-trip detection; electrically isolated from OUTB; compatible with mixed-voltage MCU I/O. |
Key Features
| Feature | Design Value |
|---|---|
| Resistor-programmable trip points | Uses standard E96 1% resistors on SETA/SETB - eliminates trimming, reduces BOM count, and removes calibration labor. |
| Dual independent trip channels | Hot (A) and cold (B) detection operate simultaneously with separate outputs - enables full thermal envelope monitoring in one device. |
| Programmable hysteresis | 5°C/10°C selected via SETB resistor value; 20°C enabled by grounding SETB - prevents false triggering during slow thermal transients. |
| Integrated trip test function | Asserting logic high on SETA or SETB forces corresponding output low - validates output path integrity during PCBA test without thermal cycling. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with extended –55°C to +130°C capability - suitable for engine bay, ADAS, and infotainment systems. |
Applications
| Automotive Infotainment USB Charger | ADAS Radar Module Thermal Guard |
|---|---|
Use Scenario: Monitors USB port power IC temperature during sustained charging to prevent thermal shutdown. IC Role / Device Role / Timing Role: Dual-channel thermal switch providing independent hot-trip (Channel A ≥ +85°C) and cold-trip (Channel B ≤ +5°C) detection for charger enable/disable control. Use Value: Prevents USB port overheating without MCU intervention; 0.5 µA quiescent current avoids battery drain during vehicle sleep mode. |
Use Scenario: Protects 77-GHz radar RF front-end from performance degradation due to excessive junction temperature. IC Role / Device Role / Timing Role: Hot-trip channel triggers fan activation or RF power reduction when MMIC die temperature exceeds +105°C; cold-trip ensures startup only above –40°C. Use Value: Maintains radar beam accuracy and signal integrity across full automotive temperature range; resistor programming allows precise matching to MMIC thermal profile. |
| Instrument Cluster LCD Backlight Control | In-Cabin Camera Module |
Use Scenario: Detects display driver IC overheating and ambient cold conditions to adjust backlight brightness and prevent condensation-related failure. IC Role / Device Role / Timing Role: Channel A trips at +75°C to dim backlight; Channel B trips at –10°C to disable PWM dimming until cabin warms. Use Value: Extends LCD lifetime by avoiding thermal stress and mechanical stress from rapid thermal expansion/contraction. |
Use Scenario: Ensures camera image sensor operates within specified temperature range for consistent auto-focus and low-noise performance. IC Role / Device Role / Timing Role: Cold-trip (Channel B = –25°C) prevents boot until optics stabilize; hot-trip (Channel A = +80°C) initiates thermal throttling of ISP processing. Use Value: Eliminates image artifacts caused by thermal drift; 2°C/5°C step resolution matches OEM thermal specification tolerances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM75BIMM/NOPB | Single-channel, I²C interface, ±2°C accuracy, 250 µA supply current - lacks resistor programming, hysteresis control, and cold-trip capability. | Requires MCU polling and firmware logic for dual-threshold behavior; unsuitable for standalone hot/cold protection. | Select only if I²C bus access and MCU coordination are available; not drop-in for TMP390AQDRLTQ1's autonomous dual-output operation. |
| MAX6505UTP+T | Single-channel, resistor-programmable, 1.5 µA supply, ±3°C accuracy - supports only overtemperature detection with fixed 10°C hysteresis. | No undertemperature channel; limited to +30°C to +125°C range; no trip test function or functional safety documentation. | Use where only hot-trip is needed and ultra-low power is secondary; cannot replace dual-channel functionality of TMP390AQDRLTQ1. |
Compared with LM75BIMM/NOPB and MAX6505UTP+T, the TMP390AQDRLTQ1 uniquely delivers autonomous dual-channel (hot + cold) detection in a single SOT-563 package with zero-calibration accuracy, programmable hysteresis, and production-ready trip test - reducing system complexity and validation effort in AEC-Q100-compliant designs.
Availability
TMP390AQDRLTQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS radar modules, instrument clusters, and in-cabin camera systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TMP390AQDRLTQ1 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 automotive-grade ICs, with decades of experience delivering high-reliability components for mission-critical applications.
The TMP390AQDRLTQ1 belongs to TI's automotive temperature sensor portfolio, designed specifically for AEC-Q100-compliant thermal protection in infotainment, ADAS, and body electronics - emphasizing ultra-low power, resistor programmability, and functional safety readiness.
FAQ
What is the operating temperature range of the TMP390AQDRLTQ1?
The TMP390AQDRLTQ1 is AEC-Q100 Grade 1 qualified with a specified operating range of –40°C to +125°C. It also supports extended operation from –55°C to +130°C, validated per TI's characterization data. This makes the TMP390AQDRLTQ1 suitable for under-hood, radar, and infotainment applications where wide thermal margins are required.
How does resistor programming work on the TMP390AQDRLTQ1?
The TMP390AQDRLTQ1 uses two external E96-series 1% resistors: RSETA (1.05 kΩ–909 kΩ) sets Channel A's hot-trip point (+30°C to +124°C in 2°C steps), and RSETB (10.5 kΩ–909 kΩ) sets Channel B's cold-trip point (–50°C to +25°C in 5°C steps) and selects hysteresis (5°C/10°C). Resistor tolerance contributes zero error to trip accuracy, as confirmed in TI's datasheet Section 6.5.
Does the TMP390AQDRLTQ1 support functional safety compliance?
Yes, the TMP390AQDRLTQ1 is functional safety-capable. Texas Instruments provides documentation-including FIT rate data, failure mode analysis, and safety manual guidance-to aid ISO 26262 ASIL-B system-level design. The TMP390AQDRLTQ1 itself is not ASIL-certified, but its architecture and support materials enable integration into ASIL-compliant thermal monitoring subsystems.
What is the purpose of the trip test function on the TMP390AQDRLTQ1?
The trip test function allows in-system validation of the TMP390AQDRLTQ1's output path during PCBA manufacturing. By applying logic high (>0.8 × VDD) to SETA or SETB, the corresponding output (OUTA or OUTB) is forced low - confirming correct soldering, pull-up resistor placement, and MCU interrupt routing without thermal chamber cycling. This feature is explicitly documented in Section 7.3.2 of the TMP390AQDRLTQ1 datasheet.
Can the TMP390AQDRLTQ1 operate with only one channel enabled?
Yes. If SETA is grounded or left floating at power-up, OUTA remains permanently low and Channel A is disabled; Channel B remains fully functional. Conversely, grounding SETB disables Channel B and configures Channel A for 20°C hysteresis. This flexibility allows the TMP390AQDRLTQ1 to serve single-threshold applications while retaining footprint compatibility and supply chain efficiency.
TMP390AQDRLTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-563, SOT-666
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Trip Temperature Threshold:
- Cold, Hot
- Switching Temperature:
- Programmable
- Accuracy:
- ±3°C
- Current - Output (Max):
- -
- Output Type:
- Open Drain
- Output:
- Active Low
- Output Function:
- OverTemp
- Selectable Hysteresis:
- Yes
- Features:
- Selectable Trip Point
- Voltage - Supply:
- 1.62 V ~ 5.5 V
- Current - Supply:
- 500nA
- Operating Temperature:
- -40°C ~ 130°C
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- -
TMP390AQDRLTQ1 FAQ
1.How can I place an order for TMP390AQDRLTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP390AQDRLTQ1 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 TMP390AQDRLTQ1 reliable?
The price and inventory of TMP390AQDRLTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP390AQDRLTQ1 is usually 5 days.
3.What payment methods are accepted for TMP390AQDRLTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP390AQDRLTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP390AQDRLTQ1?
TMP390AQDRLTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP390AQDRLTQ1 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 TMP390AQDRLTQ1?
For technical support, including TMP390AQDRLTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP390AQDRLTQ1 requirements.
6.How does Aetrix verify that TMP390AQDRLTQ1 is sourced from the original manufacturer or authorized distributors?
All TMP390AQDRLTQ1 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 TMP390AQDRLTQ1 meets industry standards.
7.What is the process for return or replacement of TMP390AQDRLTQ1?
All TMP390AQDRLTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TMP390AQDRLTQ1, 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 TMP390AQDRLTQ1 part is unused and in its original packaging.
Return procedure for TMP390AQDRLTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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