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Texas Instruments TMP275AQDRQ1
- Part No.:
- TMP275AQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TMP275AQDRQ1.pdf
- Description:
- TMP275-Q1 - AUTOMOTIVE 75C TEMP
- Quantity:
- Payment:
- Shipping:
Inventory:5,656
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Product details
Overview
TMP275AQDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified digital temperature sensor with ±0.75°C max accuracy from −10°C to +85°C, 12-bit ΔΣ ADC, and I²C/SMBus interface - used for thermal protection in engine control units, battery management, and infotainment processor monitoring.
For engineers reviewing the TMP275AQDRQ1 datasheet, TMP275AQDRQ1 pinout, TMP275AQDRQ1 application, or TMP275AQDRQ1 equivalent, this page delivers verified electrical specs, automotive-grade thermal performance, register-level interface behavior, and validated alternative options for automotive embedded thermal sensing.
Technical Context
The TMP275AQDRQ1 integrates a silicon diode-based temperature sensor, 12-bit delta-sigma ADC, oscillator, and SMBus/I²C-compatible serial interface with programmable resolution (9–12 bits) and configurable alert logic. It operates across −40°C to +125°C ambient and supports fast-mode (400 kHz) and high-speed mode (2.38 MHz) bus timing.
Its internal architecture includes dedicated THIGH/TLOW limit registers, shutdown (SD) and thermostat mode (TM) control bits, and one-shot (OS) conversion trigger - enabling comparator or interrupt-driven thermal event response without host CPU polling. The device latches address pins (A0–A2) at power-up or communication start to support up to eight devices on one bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±0.75°C max from −10°C to +85°C; ±1.5°C max over full −40°C to +125°C range - enables reliable thermal margining in automotive ECU and battery control applications. |
| Resolution | User-selectable 9–12 bits (0.5°C to 0.0625°C step size) - allows trade-off between conversion time (27.5 ms to 300 ms) and thermal measurement granularity. |
| Supply Range | 2.7 V to 5.5 V - compatible with 3.3 V and 5 V automotive subsystems without level-shifting. |
| Quiescent Current | 50 µA typical (serial bus inactive); 0.1 µA standby - extends battery life in always-on vehicle modules. |
| Interface | I²C/SMBus-compatible two-wire bus with open-drain SDA/SCL, integrated Schmitt triggers, and 500 mV input hysteresis - ensures noise immunity in electrically noisy automotive environments. |
| Alert Function | Open-drain ALERT output supporting SMBus Alert protocol and dual-limit (THIGH/TLOW) comparator/interrupt modes - enables hardware-triggered thermal fault handling. |
| ESD Rating | HBM ±2500 V, CDM ±1000 V - meets AEC-Q100 stress requirements for under-hood and cabin electronics. |
Pinout & Package
Package: 8-pin VSSOP (DGK), 3.00 mm × 3.00 mm body size - surface-mount compatible with automated automotive PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SDA) | Serial data I/O | Open-drain bidirectional bus line; requires external pullup; supports SMBus Alert response and register read/write. |
| 2 (SCL) | Serial clock input | Open-drain clock line; master-generated; controls timing of all data transfers; supports fast- and high-speed modes. |
| 3 (ALERT) | Overtemperature alert output | Open-drain active-low signal; asserts when temp ≥ THIGH or ≤ TLOW; cleared automatically in interrupt mode after temp register read. |
| 4 (GND) | Ground reference | Analog and digital ground common node; must be low-impedance connection to minimize measurement error. |
| 5 (A2) | Address select input | Logic level sets MSB of 7-bit slave address; three pins (A0–A2) enable up to eight unique addresses on shared bus. |
| 6 (A1) | Address select input | Mid-bit of slave address; latched at power-up or bus reset; no dynamic reconfiguration during operation. |
| 7 (A0) | Address select input | LSB of slave address; determines final device address; supports daisy-chained thermal sensing nodes. |
| 8 (V+) | Power supply input | 2.7 V–5.5 V single supply; powers analog sensor, ADC, digital logic, and interface; bypass capacitor required. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation with HBM/CDM ESD compliance - suitable for engine bay and transmission control modules. |
| Programmable resolution (9–12 bits) | Enables optimization of conversion speed vs. precision: 9-bit yields 27.5 ms conversion; 12-bit gives 0.0625°C step resolution. |
| Two operational alert modes | Comparator mode (TM=0) holds ALERT until temp exits limits; interrupt mode (TM=1) clears ALERT on temp register read - simplifies firmware design. |
| One-shot conversion trigger | Writing '1' to OS bit initiates single measurement then returns to shutdown - ideal for periodic battery-powered thermal checks. |
| Time-out protection | Resets serial interface if SCL or SDA held low >54 ms - prevents bus lockup in noisy automotive CAN/LIN environments. |
Applications
| Engine Control Unit (ECU) Thermal Monitoring | Battery Management System (BMS) |
|---|---|
|
Use Scenario: Real-time cylinder head and intake air temperature tracking during cold-start and wide-open-throttle conditions. IC Role / Device Role / Timing Role: Primary temperature sensor feeding closed-loop fuel injection and ignition timing algorithms. Use Value: ±0.75°C accuracy within −10°C to +85°C ensures precise air-fuel ratio compensation without system-level calibration. |
Use Scenario: Cell pack temperature profiling during charge/discharge cycles in 12 V and 48 V automotive batteries. IC Role / Device Role / Timing Role: Distributed thermal node reporting to BMS microcontroller via shared I²C bus. Use Value: 8-device addressability and 0.1 µA shutdown current extend runtime in always-monitoring configurations. |
| Infotainment Processor Thermal Throttling | Airbag Control Unit (ACU) Safety Margining |
|
Use Scenario: Die temperature supervision of SoC in head-unit display processors to prevent thermal throttling-induced UI lag. IC Role / Device Role / Timing Role: Localized sensor adjacent to processor package, interfacing via high-speed I²C (2.38 MHz). Use Value: 12-bit resolution and 220 ms max conversion time allow rapid thermal response before throttling thresholds are breached. |
Use Scenario: Cabin ambient and module substrate temperature validation during pre-crash diagnostics and post-deployment self-test. IC Role / Device Role / Timing Role: Safety-critical thermal watchdog with hardware ALERT assertion independent of MCU firmware state. Use Value: AEC-Q100 qualification and SMBus Alert protocol ensure deterministic fault signaling per ISO 26262 ASIL-B requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP175AQDRQ1 | Same pinout, register map, and accuracy (±0.75°C), but lower quiescent current (35 µA vs. 50 µA) and no high-speed mode support. | Preferred where ultra-low power dominates over bus speed; not suitable for >400 kHz I²C systems requiring 2.38 MHz burst reads. | Select TMP175AQDRQ1 for battery-constrained modules needing minimal sleep current; retain TMP275AQDRQ1 for high-throughput thermal logging. |
| LM75BIMM/NOPB | Industry-standard LM75 form factor and pinout, but only ±2°C accuracy over −25°C to +100°C and no AEC-Q100 qualification. | Acceptable for non-safety-critical cabin climate control, but insufficient for ECU or BMS where automotive-grade accuracy and qualification are mandatory. | Use LM75BIMM/NOPB for cost-sensitive consumer-grade thermal feedback; TMP275AQDRQ1 remains required for ASIL-compliant designs. |
Compared with TMP175AQDRQ1 and LM75BIMM/NOPB, the TMP275AQDRQ1 uniquely combines AEC-Q100 Grade 1 qualification, ±0.75°C accuracy across −40°C to +125°C, and 2.38 MHz high-speed I²C - making it the only option qualified for real-time thermal protection in safety-critical automotive subsystems.
Availability
TMP275AQDRQ1 is available at Aetrix Electronics and suitable for engine control units, battery management systems, and infotainment thermal monitoring requiring stable component supply across automotive production lifecycles.
Supply support for TMP275AQDRQ1 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 and embedded processing technologies, with leadership in automotive, industrial, and power management ICs.
The TMP275AQDRQ1 belongs to TI's automotive temperature sensor product line, designed specifically for high-accuracy, AEC-Q100-qualified thermal monitoring in engine, battery, and safety-critical electronic control units.
FAQ
What is the operating temperature range of the TMP275AQDRQ1?
The TMP275AQDRQ1 is specified for −40°C to +125°C ambient operation and qualified to AEC-Q100 Grade 1 standards. Its absolute maximum ratings extend to −55°C to +127°C, but guaranteed performance - including ±0.75°C accuracy - applies only within the −10°C to +85°C sub-range. Full-range accuracy is ±1.5°C.
Does the TMP275AQDRQ1 support high-speed I²C mode?
Yes, the TMP275AQDRQ1 supports high-speed I²C mode up to 2.38 MHz, in addition to standard (100 kHz) and fast (400 kHz) modes. This capability is enabled by internal filter switching upon receipt of the Hs-mode master code, allowing rapid thermal data acquisition in bandwidth-constrained automotive buses.
How many devices can share the same I²C bus with the TMP275AQDRQ1?
Up to eight TMP275AQDRQ1 devices can operate on a single I²C bus using the three address pins (A0, A1, A2). Each combination of logic levels on these pins sets a unique 7-bit slave address (1001xxx), enabling distributed thermal sensing without address conflicts.
What is the function of the ALERT pin on the TMP275AQDRQ1?
The ALERT pin on the TMP275AQDRQ1 is an open-drain output that signals thermal events based on user-configured THIGH and TLOW registers. In comparator mode (TM=0), it stays asserted until temperature exits both limits; in interrupt mode (TM=1), it clears automatically after the host reads the temperature register - enabling flexible fault-handling strategies.
Is the TMP275AQDRQ1 pin-compatible with legacy LM75-family sensors?
Yes, the TMP275AQDRQ1 is pin- and register-compatible with TI's LM75, TMP75, TMP75B, and TMP175 devices, using the same 8-pin SOIC/VSSOP footprint and identical I²C address structure. This allows drop-in replacement in existing LM75-based designs while upgrading to automotive-grade accuracy and qualification.
TMP275AQDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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:
- Shutdown Mode
- Accuracy - Highest (Lowest):
- ±1°C
- Test Condition:
- -10°C ~ 85°C (25°C ~ 100°C)
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 8-SOIC
TMP275AQDRQ1 FAQ
1.How can I place an order for TMP275AQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP275AQDRQ1 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 TMP275AQDRQ1 reliable?
The price and inventory of TMP275AQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP275AQDRQ1 is usually 5 days.
3.What payment methods are accepted for TMP275AQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP275AQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP275AQDRQ1?
TMP275AQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP275AQDRQ1 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 TMP275AQDRQ1?
For technical support, including TMP275AQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP275AQDRQ1 requirements.
6.How does Aetrix verify that TMP275AQDRQ1 is sourced from the original manufacturer or authorized distributors?
All TMP275AQDRQ1 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 TMP275AQDRQ1 meets industry standards.
7.What is the process for return or replacement of TMP275AQDRQ1?
All TMP275AQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TMP275AQDRQ1, 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 TMP275AQDRQ1 part is unused and in its original packaging.
Return procedure for TMP275AQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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