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Texas Instruments TMP75BQDRQ1
- Part No.:
- TMP75BQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TMP75BQDRQ1.pdf
- Description:
- SENSOR DIGITAL -40C-125C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,262
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Product details
Overview
TMP75BQDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade digital temperature sensor with 12-bit ADC, 0.0625°C resolution, ±1°C accuracy from –40°C to 125°C, 1.4V–3.6V supply range, and two-wire/SMBus interface - deployed for thermal protection in ADAS domain controllers and battery systems.
For engineers reviewing the TMP75BQDRQ1 datasheet, TMP75BQDRQ1 pinout, TMP75BQDRQ1 application, or TMP75BQDRQ1 equivalent, key selection criteria include automotive qualification (AEC-Q100), tri-temp test option compatibility, programmable ALERT threshold behavior, shutdown current (0.3μA typical), and SOIC-8 package thermal resistance (RθJA = 125.4°C/W).
Technical Context
The TMP75BQDRQ1 integrates a bipolar junction transistor (BJT) in band-gap configuration for on-die temperature sensing, digitized via 12-bit ADC with left-justified output format (1 LSB = 0.0625°C). It supports comparator and interrupt modes for the open-drain ALERT pin, with hysteresis controlled by TLOW/THIGH register values and fault counter logic.
Its two-wire interface implements SMBus protocol compliance including general-call reset, timeout detection (54ms typical), and high-speed mode support up to 3MHz via controller code handshake. Addressing uses three hardware-selectable pins (A0–A2) enabling eight devices on one bus, with latched address at communication start.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.4 V to 3.6 V - enables direct integration into 1.8V and 3.3V automotive subsystems without level-shifting. |
| Operating Temperature | –40°C to 125°C - meets AEC-Q100 Grade 1 requirements for under-hood and powertrain thermal monitoring. |
| Temperature Accuracy | ±1°C (typical) over full range - ensures reliable thermal throttling decisions in battery management and motor control. |
| Resolution | 12-bit (0.0625°C LSB) - provides fine-grained thermal feedback for closed-loop compensation of analog sensors. |
| Quiescent Current | 45 μA (typical, active); 0.3 μA (typical, shutdown) - extends system-level power budget in always-on vehicle modules. |
| Conversion Time | 20–35 ms (one-shot mode) - balances measurement latency and power consumption in periodic thermal polling. |
| Interface Compatibility | SMBus and two-wire - interoperates with legacy microcontrollers and automotive SoCs supporting standard serial protocols. |
Pinout & Package
Package: SOIC-8 (D), 4.9 mm × 6 mm body size, with exposed pad not present. Thermal path relies on lead-frame conduction to PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS (Pin 8) | Power supply input | Accepts 1.4–3.6 V; powers internal regulator, ADC, and interface logic - decoupling capacitor required per layout guidelines. |
| GND (Pin 4) | Ground reference | Primary return path for analog and digital circuits; must connect to low-impedance PCB ground plane. |
| SDA (Pin 1) | Serial data I/O | Open-drain bidirectional line - requires external pullup resistor; supports fast-mode (400 kHz) and high-speed (3 MHz) timing. |
| SCL (Pin 2) | Serial clock input | Master-generated clock; integrated Schmitt trigger and spike suppression filter reduce noise-induced glitches. |
| ALERT (Pin 3) | Overtemperature indicator | Open-drain output - asserts when temperature exceeds THIGH; polarity configurable via POL bit in config register. |
| A0, A1, A2 (Pins 7, 6, 5) | Address select inputs | Hardwired to GND or VS to set one of eight unique I²C addresses - latched at start of first communication. |
Key Features
| Feature | Design Value |
|---|---|
| Functional Safety-Capable | Documentation available for ISO 26262 ASIL-B system integration - supports diagnostic coverage analysis for thermal monitoring paths. |
| Programmable ALERT Thresholds | TLOW and THIGH registers enable thermostat-like operation without host MCU intervention - reduces firmware overhead in safety-critical loops. |
| Shutdown Mode | Reduces current to 0.3 μA - allows periodic wake-up sampling in ultra-low-power vehicle subsystems (e.g., parked-mode battery monitoring). |
| Tri-Temp Test Option Support | Compatible with TMP75BTQDGKRQ1 production test flow - enables traceable validation at –40°C, 25°C, and 125°C for mission-critical applications. |
| No External Components Required | On-chip BJT sensor and ADC eliminate need for thermistors, op-amps, or calibration circuitry - simplifies BOM and improves long-term drift stability. |
Applications
| ADAS Domain Controller | Onboard Charger |
|---|---|
Use Scenario: Real-time die temperature monitoring of SoC and power semiconductors during sensor fusion processing. IC Role / Device Role / Timing Role: Standalone thermal watchdog feeding ALERT signal directly to safety monitor unit for immediate throttling or shutdown. Use Value: Prevents thermal runaway using ±1°C accuracy across –40°C to 125°C, eliminating need for external calibration or lookup tables. | Use Scenario: Monitoring IGBT/module temperature in high-voltage DC-DC conversion stages. IC Role / Device Role / Timing Role: Primary temperature sensor interfacing with MCU via SMBus for closed-loop thermal derating control. Use Value: 12-bit resolution enables precise margining of thermal headroom, improving charger efficiency while maintaining AEC-Q100 compliance. |
| Battery Management System | Head Unit & Digital Cockpit |
Use Scenario: Cell pack temperature acquisition in 48V mild-hybrid battery modules. IC Role / Device Role / Timing Role: Distributed temperature node on CAN-connected slave board, reporting via two-wire to local gateway MCU. Use Value: 0.3 μA shutdown current extends sleep-mode battery life; 1.4V minimum supply supports operation during deep discharge events. | Use Scenario: Thermal supervision of display driver ICs and audio amplifiers in infotainment head units. IC Role / Device Role / Timing Role: Local thermal sensor connected to application processor's I²C bus for dynamic fan speed and brightness control. Use Value: Programmable ALERT eliminates polling overhead, reducing CPU load and improving real-time response to overheating conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM75BIDR | Non-automotive grade; no AEC-Q100 qualification; ±2°C accuracy over –25°C to 100°C; same SOIC-8 footprint. | Limited to industrial or consumer applications; lacks functional safety documentation and tri-temp test traceability. | Select only for cost-sensitive non-automotive designs where Grade 1 qualification is unnecessary. |
| TMP117MRTJT | Higher accuracy (±0.1°C max), 16-bit resolution, 1.71–3.6V supply, but no ALERT pin; QFN-12 package. | Requires PCB redesign; better suited for precision calibration tasks than thermal protection roles. | Choose when absolute accuracy outweighs ALERT functionality and automotive qualification requirements. |
Compared with LM75BIDR, TMP75BQDRQ1 delivers certified automotive reliability and tighter accuracy over extended temperature range; versus TMP117MRTJT, it trades resolution for integrated overtemperature alerting and drop-in compatibility with legacy LM75-based layouts.
Availability
TMP75BQDRQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, onboard chargers, and battery management systems requiring stable component supply across automotive production lifecycles.
Supply support for TMP75BQDRQ1 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 solutions.
The TMP75B-Q1 product line delivers AEC-Q100 qualified digital temperature sensors optimized for thermal protection and compensation in automotive ECUs, replacing discrete thermistor networks with calibrated, integrated alternatives.
FAQ
What automotive qualification does TMP75BQDRQ1 meet?
TMP75BQDRQ1 is AEC-Q100 qualified for Grade 1 (–40°C to 125°C ambient), with HBM ESD classification 2 and CDM classification C4B. It undergoes production testing at room temperature (25°C), and its tri-temp test variant TMP75BTQDGKRQ1 adds validation at –40°C and 125°C. This makes TMP75BQDRQ1 suitable for engine bay, powertrain, and ADAS applications where environmental robustness is mandatory.
How does the ALERT pin function in TMP75BQDRQ1?
The ALERT pin in TMP75BQDRQ1 operates in two configurable modes: comparator mode (default, TM=0) or interrupt mode (TM=1). In comparator mode, ALERT asserts when temperature ≥ THIGH and clears only after falling below TLOW - providing hysteresis against noise. In interrupt mode, ALERT stays active until any register is read or SMBus alert response occurs. Polarity is set by the POL bit, supporting both active-low and active-high system interfaces.
Can TMP75BQDRQ1 be used with 1.8V and 3.3V microcontrollers?
Yes, TMP75BQDRQ1 operates across 1.4V to 3.6V supply, making it compatible with both 1.8V and 3.3V host systems. Its VIH and VIL thresholds scale with VS (VIH ≥ 0.7×VS, VIL ≤ 0.3×VS), and SDA/SCL feature integrated Schmitt triggers and spike filters - ensuring reliable communication without external level shifters in mixed-voltage automotive designs.
What is the temperature resolution and accuracy of TMP75BQDRQ1?
TMP75BQDRQ1 provides 12-bit temperature data with 0.0625°C resolution (1 LSB). Accuracy is ±0.5°C (typical) from –20°C to 85°C and ±1°C (typical) across the full –40°C to 125°C operating range. These values are factory-calibrated and do not require end-user compensation - critical for consistent thermal management in safety-relevant automotive functions.
Is TMP75BQDRQ1 pin-compatible with legacy LM75 devices?
Yes, TMP75BQDRQ1 is pin- and register-compatible with the industry-standard LM75 and TMP75, sharing identical SOIC-8 pinout, address scheme (A0–A2), and register map. This enables drop-in replacement in existing designs, preserving PCB layout and firmware while upgrading to AEC-Q100 qualification, improved accuracy, and lower quiescent current (45 μA vs. ~250 μA in LM75).
TMP75BQDRQ1 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:
- SMBus
- Voltage - Supply:
- 1.4V ~ 3.6V
- Resolution:
- 11 b
- Features:
- One-Shot, Output Switch, Programmable Limit, Shutdown Mode
- Accuracy - Highest (Lowest):
- ±2°C (±3°C)
- Test Condition:
- -25°C ~ 85°C (-40°C ~ 125°C)
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 8-SOIC
TMP75BQDRQ1 FAQ
1.How can I place an order for TMP75BQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP75BQDRQ1 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 TMP75BQDRQ1 reliable?
The price and inventory of TMP75BQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP75BQDRQ1 is usually 5 days.
3.What payment methods are accepted for TMP75BQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP75BQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP75BQDRQ1?
TMP75BQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP75BQDRQ1 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 TMP75BQDRQ1?
For technical support, including TMP75BQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP75BQDRQ1 requirements.
6.How does Aetrix verify that TMP75BQDRQ1 is sourced from the original manufacturer or authorized distributors?
All TMP75BQDRQ1 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 TMP75BQDRQ1 meets industry standards.
7.What is the process for return or replacement of TMP75BQDRQ1?
All TMP75BQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TMP75BQDRQ1, 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 TMP75BQDRQ1 part is unused and in its original packaging.
Return procedure for TMP75BQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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