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Texas Instruments TMP175AQDRQ1
- Part No.:
- TMP175AQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TMP175AQDRQ1.pdf
- Description:
- SENSOR DIGITAL -40C-125C
- Quantity:
- Payment:
- Shipping:
Inventory:2,717
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Product details
Overview
TMP175AQDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive digital temperature sensor with I²C/SMBus interface, 12-bit ΔΣ ADC, ±1°C typical accuracy from –40°C to +125°C, and 27 configurable slave addresses - used for thermal monitoring in engine control units, battery management, and infotainment processors.
For engineers reviewing the TMP175AQDRQ1 datasheet, TMP175AQDRQ1 pinout, TMP175AQDRQ1 application, or TMP175AQDRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade operating range (–40°C to +125°C), real-world resolution options (9–12 bits), and accurate alternative part comparisons - all grounded in TI's SBOS759 datasheet.
Technical Context
The TMP175AQDRQ1 integrates a silicon-based temperature-sensing element with a 12-bit delta-sigma ADC and on-chip oscillator, delivering direct digital output without external signal conditioning. Its internal thermal path relies primarily on package leads for conduction, enabling fast ambient response in sealed automotive enclosures.
It operates as a two-wire bus slave supporting Fast Mode (400 kHz) and High-Speed Mode (2.38 MHz), with open-drain SDA/SCL/ALERT pins requiring external pullups. Address configuration via A0/A1/A2 enables up to 27 devices per bus, and the ALERT pin supports SMBus Alert protocol for interrupt-driven thermal event detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±1°C typical, ±2°C max over –40°C to +125°C - enables direct NTC/PTC thermistor replacement without calibration. |
| Resolution | User-selectable 9–12 bits (0.5°C to 0.0625°C step size) - allows trade-off between conversion time and precision. |
| Supply Range | 2.7 V to 5.5 V - compatible with 3.3 V and 5 V automotive microcontroller domains. |
| Quiescent Current | 50 µA active, 0.1 µA shutdown - supports low-power wake-on-temperature designs in always-on modules. |
| Interface | I²C/SMBus/TWI compatible, 2.38 MHz max clock - interoperable with standard MCU peripherals and automotive communication stacks. |
| Address Options | 27 unique slave addresses via A0/A1/A2 logic states - eliminates address conflicts in multi-sensor ECUs. |
| ESD Rating | HBM ±2500 V, CDM ±1000 V - meets automotive board-level ESD robustness requirements. |
Pinout & Package
Package: 8-pin VSSOP (DGK), body size 3.00 mm × 3.00 mm - surface-mount compatible with high-density automotive PCB layouts and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SDA | Serial data I/O | Open-drain bidirectional line; requires external pullup; handles address, command, and temperature register reads/writes. |
| 2 - SCL | Serial clock input | Open-drain clock line; synchronizes all I²C transfers; supports Fast and High-Speed modes up to 2.38 MHz. |
| 3 - ALERT | Overtemperature alert output | Open-drain interrupt signal; asserts when temp exceeds THIGH or falls below TLOW; supports SMBus Alert protocol. |
| 4 - GND | Ground reference | Primary return path for analog and digital circuits; must be low-impedance to minimize thermal measurement error. |
| 5 - A2 | Address select input | Configures MSB of 7-bit slave address; logic level or float determines one of 27 possible addresses. |
| 6 - A1 | Address select input | Configures middle bit of slave address; sampled at bus start; enables multi-device arbitration on shared bus. |
| 7 - A0 | Address select input | Configures LSB of slave address; floating state supported only on TMP175AQDRQ1 (not TMP75-Q1). |
| 8 - V+ | Power supply input | 2.7–5.5 V supply; powers ADC, logic, and interface; requires 0.01-µF bypass capacitor per datasheet layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - suitable for under-hood and powertrain thermal sensing. |
| Configurable conversion resolution | 9–12-bit selection via Configuration register - reduces conversion time from 27.5 ms (9-bit) to 300 ms (12-bit) as needed. |
| SMBus Alert protocol support | Enables master-initiated device identification during thermal interrupts - avoids polling and saves MCU resources. |
| Shutdown and One-Shot modes | 0.1 µA standby current + software-triggered single conversion - ideal for battery-backed or intermittent monitoring systems. |
| Time-out protection | Resets interface if SCL/SDA held low >54 ms - prevents bus lockup in noisy automotive environments. |
Applications
| Engine Control Units | Battery Management Systems |
|---|---|
Use Scenario: Real-time cylinder head and intake air temperature monitoring in gasoline/diesel powertrains. IC Role / Device Role / Timing Role: Primary ambient temperature sensor feeding closed-loop fuel injection and ignition timing algorithms. Use Value: ±1°C accuracy ensures precise air-fuel ratio calculation across –40°C cold starts to +125°C under-hood conditions. |
Use Scenario: Cell pack and module temperature tracking in 12 V and 48 V automotive battery systems. IC Role / Device Role / Timing Role: Distributed thermal node reporting to BMS controller via shared I²C bus with 27-address flexibility. Use Value: 0.1 µA shutdown current extends sleep-mode battery life; ALERT pin triggers immediate thermal derating action. |
| Infotainment Processor Thermal Management | Electric Water Pumps |
Use Scenario: SoC die temperature supervision in head-unit and ADAS domain controllers. IC Role / Device Role / Timing Role: Secondary thermal monitor placed near processor package to detect localized hotspots. Use Value: 12-bit resolution (0.0625°C) enables fine-grained fan speed control and dynamic frequency scaling decisions. |
Use Scenario: Motor winding and electronics temperature feedback in electric coolant pumps. IC Role / Device Role / Timing Role: Safety-critical thermal watchdog interfacing directly with pump MCU over I²C. Use Value: AEC-Q100 qualification and SMBus Alert ensure fail-safe shutdown before insulation breakdown or bearing failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP75AQDRQ1 | 8 slave addresses (vs 27); ±3°C max accuracy; NIST-traceable calibration; identical pinout and interface. | Preferred where fewer sensors per bus are needed and metrological traceability is required for validation. | Select TMP75AQDRQ1 when calibration documentation and ISO/IEC 17025 traceability are mandatory for production testing. |
| LM75BIMM/NOPB | Non-automotive grade (–25°C to +100°C); no AEC-Q100; 9-bit default resolution; 8-pin VSSOP pin-compatible but not functionally identical. | Restricted to cabin or non-safety-critical consumer-grade modules lacking extended temperature or reliability requirements. | Use LM75BIMM/NOPB only in cost-sensitive, non-automotive applications where Grade 1 qualification and 125°C operation are unnecessary. |
Compared with TMP75AQDRQ1, TMP175AQDRQ1 offers greater bus scalability and tighter accuracy over full automotive range; compared with LM75BIMM/NOPB, it provides AEC-Q100 compliance, extended temperature capability, and enhanced resolution - making it the sole qualified choice for safety-relevant thermal sensing.
Availability
TMP175AQDRQ1 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 TMP175AQDRQ1 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 IC design and manufacturing.
The TMPx75-Q1 product line was developed specifically for automotive thermal sensing, targeting AEC-Q100 Grade 1 compliance, I²C/SMBus interoperability, and drop-in replacement of legacy analog temperature solutions in ECU and powertrain systems.
FAQ
What is the operating temperature range of the TMP175AQDRQ1?
The TMP175AQDRQ1 is specified for continuous operation from –40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements. Its absolute maximum junction temperature is 150°C, and storage range extends from –60°C to +130°C - validated for under-hood and powertrain applications where thermal stress is critical. This range is confirmed in Section 6.3 of the SBOS759 datasheet.
How many unique I²C addresses does the TMP175AQDRQ1 support?
The TMP175AQDRQ1 supports 27 unique 7-bit slave addresses via combinations of A0, A1, and A2 pin states - including grounded, V+, and floating configurations. This is double the 8-address capacity of the pin-compatible TMP75AQDRQ1 and enables dense sensor deployment on a single bus without address conflict. Table 2 in the SBOS759 datasheet lists all 27 valid address codes.
Does the TMP175AQDRQ1 require external components for basic operation?
Yes - the TMP175AQDRQ1 requires a 0.01-µF supply bypass capacitor between V+ and GND, and external pullup resistors on SDA, SCL, and ALERT lines (typically 4.7 kΩ for 3.3 V systems). These are mandatory per Section 9 and Figure 21 of the SBOS759 datasheet to ensure stable power delivery, noise immunity, and proper open-drain bus signaling.
Can the TMP175AQDRQ1 operate in shutdown mode while retaining I²C responsiveness?
Yes - in shutdown mode (SD = 1), the TMP175AQDRQ1 draws only 0.1 µA and halts temperature conversions, but the I²C interface remains fully active. The device responds to address calls, accepts configuration writes, and can be woken via One-Shot (OS = 1) command - enabling ultra-low-power thermal supervision in always-on vehicle networks.
What is the resolution and conversion time relationship for the TMP175AQDRQ1?
The TMP175AQDRQ1 supports 9-, 10-, 11-, or 12-bit resolution, with corresponding typical conversion times of 27.5 ms, 55 ms, 110 ms, and 220 ms. Resolution is set via bits 1–0 of the Configuration register (R1:R0), and higher resolution increases measurement granularity (down to 0.0625°C) at the cost of longer acquisition latency - a key trade-off for real-time thermal control loops.
TMP175AQDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SOIC
TMP175AQDRQ1 FAQ
1.How can I place an order for TMP175AQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP175AQDRQ1 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 TMP175AQDRQ1 reliable?
The price and inventory of TMP175AQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP175AQDRQ1 is usually 5 days.
3.What payment methods are accepted for TMP175AQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP175AQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP175AQDRQ1?
TMP175AQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP175AQDRQ1 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 TMP175AQDRQ1?
For technical support, including TMP175AQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP175AQDRQ1 requirements.
6.How does Aetrix verify that TMP175AQDRQ1 is sourced from the original manufacturer or authorized distributors?
All TMP175AQDRQ1 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 TMP175AQDRQ1 meets industry standards.
7.What is the process for return or replacement of TMP175AQDRQ1?
All TMP175AQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TMP175AQDRQ1, 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 TMP175AQDRQ1 part is unused and in its original packaging.
Return procedure for TMP175AQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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