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Texas Instruments TMP275AQDGKRQ1
- Part No.:
- TMP275AQDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- -
- Datasheet:
-
TMP275AQDGKRQ1.pdf
- Description:
- SENSOR DIGITAL -40C-125C
- Quantity:
- Payment:
- Shipping:
Inventory:1,073
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Product details
Overview
TMP275AQDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive digital temperature sensor with ±0.75°C accuracy (−10°C to +85°C), 12-bit resolution, and I²C/SMBus interface - used for thermal protection in engine control units, battery management, and infotainment processors.
For engineers reviewing the TMP275AQDGKRQ1 datasheet, TMP275AQDGKRQ1 pinout, TMP275AQDGKRQ1 application, or TMP275AQDGKRQ1 equivalent, this page delivers verified electrical specs, automotive-grade thermal performance, register-level interface behavior, and validated alternatives for ECU, BCM, and ADAS thermal monitoring designs.
Technical Context
The TMP275AQDGKRQ1 integrates a ΔΣ ADC, on-chip diode temperature sensor, oscillator, and SMBus/I²C slave interface with programmable resolution (9–12 bits) and configurable alert modes (comparator or interrupt). It operates across −40°C to +125°C ambient with no external components required.
Its three address pins (A0–A2) support up to eight devices per bus; ALERT is open-drain with SMBus Alert protocol support; SDA/SCL include Schmitt triggers and spike suppression. Shutdown mode reduces current to 0.1 µA while retaining bus responsiveness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±0.75°C max (−10°C to +85°C); enables precise thermal compensation without system-level calibration |
| Resolution | User-selectable 9–12 bits (0.5°C to 0.0625°C step); balances conversion speed vs. precision per application need |
| Supply Range | 2.7 V to 5.5 V; compatible with 3.3 V and 5 V automotive domains without level-shifting |
| Quiescent Current | 50 µA typical (active), 0.1 µA standby; supports low-power wake-on-temperature in always-on modules |
| Interface | I²C/SMBus-compatible, up to 2.38 MHz high-speed mode; interoperable with standard microcontroller peripherals |
| Operating Temp | −40°C to +125°C ambient; qualified for AEC-Q100 Grade 1, suitable for under-hood and cabin ECU placement |
| ESD Rating | HBM ±2500 V, CDM ±1000 V; meets automotive robustness requirements for board-level handling and operation |
Pinout & Package
Package: 8-pin VSSOP (DGK), 3.00 mm × 3.00 mm body size - optimized for space-constrained automotive PCBs with thermal pad compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SDA) | Serial data I/O | Open-drain bidirectional line; requires external pullup; supports SMBus Alert response and general-call commands |
| 2 (SCL) | Serial clock input | Open-drain clock line; accepts fast-mode (400 kHz) and high-speed mode (2.38 MHz) timing; includes Schmitt trigger |
| 3 (ALERT) | Overtemperature output | Open-drain interrupt/comparator output; active-low; latched or auto-clearing based on TM bit configuration |
| 4 (GND) | Ground reference | Primary return path for analog and digital circuits; must be low-impedance connection to minimize noise coupling |
| 5 (A2) | Address select input | Binary address bit; logic level sets LSB of 7-bit slave address (1001xxx); latched at power-up or reset |
| 6 (A1) | Address select input | Binary address bit; middle bit of 7-bit slave address; enables multi-sensor bus topology without address conflict |
| 7 (A0) | Address select input | Binary address bit; MSB of 7-bit slave address; allows up to eight TMP275AQDGKRQ1 devices on one I²C bus |
| 8 (V+) | Power supply input | 2.7–5.5 V single supply; powers internal ADC, logic, and interface; no power-up sequencing required |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to +125°C), HBM ±2500 V, CDM ±1000 V - certified for safety-critical vehicle subsystems |
| Pin- and register-compatible | Drop-in replacement for LM75, TMP75, TMP75B, and TMP175 - preserves existing firmware and layout |
| Programmable resolution | 9–12-bit selection via Configuration register - adjusts conversion time from 27.5 ms (9-bit) to 300 ms (12-bit) |
| SMBus Alert protocol | Supports multi-device arbitration on shared bus; host identifies alerting device by returning its slave address |
| Shutdown & One-Shot modes | 0.1 µA standby current; OS bit triggers single conversion then re-enters shutdown - ideal for periodic thermal sampling |
Applications
| Engine Control Unit (ECU) Thermal Monitoring | Battery Control Unit (BCU) Temperature Sensing |
|---|---|
|
Use Scenario: Real-time cylinder head and intake manifold temperature tracking during cold-start and high-load conditions. IC Role / Device Role / Timing Role: Primary ambient temperature sensor feeding closed-loop thermal management algorithms in the ECU microcontroller. Use Value: ±0.75°C accuracy over −10°C to +85°C ensures reliable knock detection and fuel trim correction without calibration drift. |
Use Scenario: Cell-level temperature monitoring in 12 V lead-acid and 48 V Li-ion battery packs for state-of-charge and thermal runaway prevention. IC Role / Device Role / Timing Role: Standalone digital sensor interfacing directly to BCU's I²C master, triggering ALERT on overtemperature events. Use Value: 0.1 µA shutdown current extends battery life in parked-vehicle monitoring; SMBus Alert enables rapid fault isolation across multi-sensor strings. |
| Infotainment Processor Thermal Throttling | ADAS Camera Module Temperature Compensation |
|
Use Scenario: Die temperature feedback for SoC thermal throttling in automotive head units and digital instrument clusters. IC Role / Device Role / Timing Role: Secondary thermal sensor placed adjacent to processor package to detect localized hot spots not captured by on-die sensors. Use Value: 12-bit resolution (0.0625°C) enables fine-grained fan speed control and dynamic frequency scaling to maintain UI responsiveness. |
Use Scenario: Lens and image sensor temperature compensation in forward-facing ADAS cameras to correct focus drift and color shift. IC Role / Device Role / Timing Role: High-stability reference sensor mounted on camera PCB to calibrate optical and ISP parameters in real time. Use Value: Factory-calibrated ±0.75°C accuracy eliminates need for end-of-line thermal characterization, reducing test time and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP175AQDGKRQ1 | Same pinout, register map, and accuracy (±0.75°C), but lower max operating temperature (−40°C to +105°C) | Not qualified for full AEC-Q100 Grade 1 range; unsuitable for under-hood ECU use above +105°C | Select TMP175AQDGKRQ1 only when ambient temperature stays ≤+105°C and footprint reuse is critical |
| LM75BIMM/NOPB | Non-automotive grade; ±2°C accuracy (−25°C to +100°C); no AEC-Q100 qualification or SMBus Alert support | Lacks HBM/CDM ESD ratings and thermal range for automotive deployment; intended for industrial/commercial use | Use LM75BIMM/NOPB only in non-safety-critical, non-automotive systems where cost is prioritized over qualification |
Compared with TMP175AQDGKRQ1 and LM75BIMM/NOPB, the TMP275AQDGKRQ1 uniquely delivers full AEC-Q100 Grade 1 compliance, SMBus Alert arbitration, and guaranteed ±0.75°C accuracy across −40°C to +125°C - making it the only drop-in option for production automotive ECUs requiring functional safety alignment.
Availability
TMP275AQDGKRQ1 is available at Aetrix Electronics and suitable for engine control units, battery management systems, and ADAS camera modules requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for TMP275AQDGKRQ1 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 ICs, with decades of experience in high-reliability automotive electronics design and manufacturing.
The TMP275AQDGKRQ1 belongs to TI's automotive temperature sensor product line, engineered specifically for thermal monitoring in AEC-Q100-compliant ECUs, BCUs, and ADAS subsystems where accuracy, robustness, and bus scalability are critical.
FAQ
What is the maximum operating temperature range for the TMP275AQDGKRQ1?
The TMP275AQDGKRQ1 is specified for −40°C to +125°C ambient operating temperature and qualified to AEC-Q100 Grade 1 standards. Its absolute maximum junction temperature is 150°C, and storage temperature range is −60°C to +130°C - enabling reliable deployment in under-hood and powertrain control applications where thermal stress is extreme.
Does the TMP275AQDGKRQ1 require external components for basic operation?
No, the TMP275AQDGKRQ1 requires no external components for core temperature sensing functionality. Only two external pullup resistors on SDA and SCL lines (and optionally on ALERT) are needed for I²C/SMBus communication. A 0.01-µF supply bypass capacitor on V+ is recommended but not mandatory for stable operation within spec.
How does the ALERT pin function in comparator versus interrupt mode on the TMP275AQDGKRQ1?
In comparator mode (TM = 0), the ALERT pin remains asserted until temperature falls below TLOW after exceeding THIGH. In interrupt mode (TM = 1), ALERT activates on THIGH/TLOW breach and clears automatically upon reading the temperature register - enabling precise event capture without polling overhead in the TMP275AQDGKRQ1's firmware interface.
Can the TMP275AQDGKRQ1 be used on the same I²C bus as legacy LM75 devices?
Yes, the TMP275AQDGKRQ1 is pin- and register-compatible with the LM75, TMP75, TMP75B, and TMP175 families. It shares identical address mapping, pointer register structure, and temperature data format - allowing direct hardware and software substitution without PCB or firmware changes in existing LM75-based designs.
What is the conversion time for 12-bit resolution on the TMP275AQDGKRQ1?
At 12-bit resolution, the TMP275AQDGKRQ1 requires 220 ms (typical) to 300 ms (maximum) for a full temperature conversion. This timing is guaranteed across the full −40°C to +125°C operating range and 2.7 V to 5.5 V supply voltage, enabling deterministic thermal sampling intervals in real-time automotive control loops.
TMP275AQDGKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -40°C ~ 125°C
- Sensing Temperature - Remote:
- -
- Output Type:
- I2C/SMBus
- Voltage - Supply:
- 2.7V ~ 5.5V
- Resolution:
- 12 b
- Features:
- -
- Accuracy - Highest (Lowest):
- ±1°C
- Test Condition:
- -40°C ~ 125°C
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- -
TMP275AQDGKRQ1 FAQ
1.How can I place an order for TMP275AQDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP275AQDGKRQ1 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 TMP275AQDGKRQ1 reliable?
The price and inventory of TMP275AQDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP275AQDGKRQ1 is usually 5 days.
3.What payment methods are accepted for TMP275AQDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP275AQDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP275AQDGKRQ1?
TMP275AQDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP275AQDGKRQ1 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 TMP275AQDGKRQ1?
For technical support, including TMP275AQDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP275AQDGKRQ1 requirements.
6.How does Aetrix verify that TMP275AQDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All TMP275AQDGKRQ1 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 TMP275AQDGKRQ1 meets industry standards.
7.What is the process for return or replacement of TMP275AQDGKRQ1?
All TMP275AQDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TMP275AQDGKRQ1, 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 TMP275AQDGKRQ1 part is unused and in its original packaging.
Return procedure for TMP275AQDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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