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Texas Instruments LM95071QIMFX/NOPB
- Part No.:
- LM95071QIMFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM95071QIMFX/NOPB.pdf
- Description:
- SENSOR DIGITAL -40C-150C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:11,571
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Product details
Overview
LM95071QIMFX/NOPB from Texas Instruments is an AEC-Q100 Grade 0 automotive-qualified SPI/MICROWIRE 13-bit-plus-sign digital temperature sensor in a 5-pin SOT-23 package. It delivers ±1°C accuracy from 0°C to +70°C and ±2°C across −40°C to +150°C, with 0.03125°C resolution, 280 µA typical operating current, and 2.4 V to 5.5 V supply range - used for real-time thermal monitoring in engine control units and battery management systems.
For engineers reviewing the LM95071QIMFX/NOPB datasheet, LM95071QIMFX/NOPB pinout, LM95071QIMFX/NOPB application, or LM95071QIMFX/NOPB equivalent, key selection considerations include its automotive-grade qualification, shutdown mode power savings (6 µA), SOT-23 footprint constraints, and compatibility with MSP432P4 and other TI microcontrollers via three-wire serial interface.
Technical Context
The LM95071QIMFX/NOPB integrates a ΔΣ ADC and on-die temperature sensing element, supporting SPI and MICROWIRE protocols with data clocked out on SC falling edge and in on rising edge. Its register map includes read-only temperature and manufacturer ID registers plus a write-only configuration register controlling shutdown/continuous conversion modes.
It operates in two functional states: continuous conversion (default at power-up) and shutdown (entered by writing 0xFF), where it outputs fixed 16-bit ID code (0x800F) while retaining bus responsiveness. Conversion time is up to 228 ms, requiring ≥228 ms between reads for valid results.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.4 V to 5.5 V - supports direct connection to common 3.3 V or 5 V rails without LDO |
| Temperature Accuracy | ±1°C max (0°C to +70°C); ±2°C max (−40°C to +150°C) - meets automotive cabin and under-hood thermal monitoring requirements |
| Resolution | 0.03125°C per LSB - enables detection of sub-degree thermal drift for closed-loop compensation |
| Operating Current | 280 µA typical - allows integration into low-power wake-on-temperature systems |
| Shutdown Current | 6 µA typical - reduces system standby power in infotainment or ADAS modules |
| Conversion Time | 228 ms maximum - defines minimum polling interval for stable thermal feedback loops |
| Interface Protocol | SPI/MICROWIRE-compatible three-wire serial - interoperable with TI MSP432P4 and other controllers without protocol translation |
Pinout & Package
LM95071QIMFX/NOPB uses a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm with standard tape-and-reel packaging (3000 pcs/reel, MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Chip Select input | Active-low enable signal; must be held high ≥160 ns between transactions to avoid bus contention |
| 2 - GND | Power and signal ground | Common return path for analog sensor core and digital I/O; requires low-impedance PCB connection |
| 3 - SI/O | Serial Input/Output bidirectional data line | Tri-state capable; transmits temperature data on falling SC edge, receives commands on rising SC edge |
| 4 - SC | Serial clock input | Schmitt-triggered clock input; timing parameters require t2 ≥100 ns setup before first SC high pulse |
| 5 - VDD | Positive supply voltage | Must be bypassed with 0.1 µF ceramic capacitor to GND; supports 2.4–5.5 V operation without external regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40°C to +150°C ambient operation - suitable for engine bay and transmission control applications |
| 14-bit two's complement output format | Enables signed temperature values directly usable in firmware without bit-shifting or sign extension |
| Manufacturer ID register | Reads fixed 0x800F code in shutdown mode - provides hardware-level device authentication in multi-sensor BOMs |
| Low-noise ΔΣ ADC architecture | Minimizes output jitter in thermal compensation loops - critical for precision oscillator temperature control |
| Tri-state SI/O during CS high | Allows multiple LM95071QIMFX/NOPB devices on shared SC/SI/O lines with individual CS routing |
Applications
| Engine Control Unit (ECU) | Battery Management System (BMS) |
|---|---|
Use Scenario: Real-time cylinder head and intake manifold temperature monitoring during cold-start and wide-open-throttle conditions. IC Role / Device Role / Timing Role: Primary analog-to-digital temperature transducer interfacing directly to ECU MCU via SPI, delivering 14-bit signed readings every 228+ ms. Use Value: Enables adaptive fuel injection timing and knock control based on localized thermal gradients, improving emissions compliance and drivability. | Use Scenario: Cell-level temperature tracking across 12S Li-ion battery packs in electric powertrain systems. IC Role / Device Role / Timing Role: Distributed thermal sensor node reporting to BMS master controller; operates in shutdown mode between periodic wake cycles. Use Value: Reduces quiescent current draw below 10 µA per cell string, extending pack sleep-mode duration without compromising thermal safety margins. |
| Automotive Infotainment Head Unit | ADAS Radar Module |
Use Scenario: Thermal derating of display backlight drivers and SoC voltage regulators during extended summer operation. IC Role / Device Role / Timing Role: Secondary temperature monitor co-located with power stages; communicates via shared SPI bus with dedicated CS line. Use Value: Triggers dynamic brightness reduction or CPU throttling before silicon junction temperatures exceed 125°C, preventing thermal shutdown events. | Use Scenario: Junction temperature monitoring of GaN RF power amplifiers in 77 GHz radar transceivers. IC Role / Device Role / Timing Role: High-accuracy local sensor mounted adjacent to PA die; reads temperature every 500 ms during active chirp sequences. Use Value: Supports real-time RF output power adjustment to maintain phase stability within ±0.5° over −40°C to +125°C, meeting ISO 26262 ASIL-B thermal integrity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM75BIMM/NOPB | ±2°C accuracy over −25°C to +100°C; I²C interface; no automotive qualification | Targeted at industrial/commercial PCBs without AEC-Q100 requirements | Select when cost sensitivity outweighs automotive reliability needs and I²C infrastructure exists |
| MAX31820MUA+ | ±0.5°C accuracy; 1-Wire interface; wider −55°C to +125°C range; no shutdown mode | Used in distributed sensor networks with long cable runs and minimal GPIO usage | Choose for single-wire bus simplicity and higher accuracy where power budget permits continuous operation |
Compared with LM75BIMM/NOPB and MAX31820MUA+, the LM95071QIMFX/NOPB uniquely combines AEC-Q100 Grade 0 qualification, SPI/MICROWIRE compatibility, and sub-10 µA shutdown current - making it the only option qualified for safety-critical under-hood thermal monitoring with deterministic low-power polling.
Availability
LM95071QIMFX/NOPB is available at Aetrix Electronics and suitable for automotive engine control, battery management, and ADAS radar modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM95071QIMFX/NOPB 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 personal electronics markets.
The LM95071-Q1 product line was designed specifically for automotive thermal sensing applications demanding AEC-Q100 qualification, high accuracy across extreme temperatures, and minimal board space - targeting ECU, BMS, and ADAS subsystems.
FAQ
What is the maximum operating temperature range supported by the LM95071QIMFX/NOPB?
The LM95071QIMFX/NOPB is rated for continuous operation from −40°C to +150°C ambient temperature, validated per AEC-Q100 Grade 0 requirements. This range covers under-hood environments including engine compartments and transmission control units. The sensor maintains ±2°C maximum error across this full span, with tighter ±1°C accuracy specified from 0°C to +70°C for cabin-mounted applications.
Does the LM95071QIMFX/NOPB support both SPI and MICROWIRE protocols simultaneously?
Yes, the LM95071QIMFX/NOPB implements a single three-wire serial interface compatible with both SPI and MICROWIRE standards. It uses chip select (CS), serial clock (SC), and bidirectional serial I/O (SI/O) pins, with data sampled on SC rising edge and shifted out on falling edge - matching timing conventions of both protocols without mode selection or configuration overhead.
How does the shutdown mode function in the LM95071QIMFX/NOPB, and what is its impact on communication?
In shutdown mode, the LM95071QIMFX/NOPB draws only 6 µA typical current while retaining full SPI/MICROWIRE bus responsiveness. Writing 0xFF to the configuration register places it in shutdown, causing it to output the fixed Manufacturer ID code 0x800F on SI/O. The bus remains active, allowing host controllers to read ID data or re-enable continuous conversion without power cycling.
What is the meaning of the 14-bit two's complement output format used by the LM95071QIMFX/NOPB?
LM95071QIMFX/NOPB outputs temperature as a 14-bit two's complement value where bit 15 is the sign bit and LSB = 0.03125°C. For example, 0x0C83 = +25°C, 0xF383 = −25°C, and 0xEC03 = −40°C. This format enables direct signed arithmetic in firmware without conversion, simplifying thermal control algorithms in automotive MCUs like the MSP432P4.
Can multiple LM95071QIMFX/NOPB sensors share the same SC and SI/O lines on a single SPI bus?
Yes, multiple LM95071QIMFX/NOPB devices can share SC and SI/O lines when each has a dedicated chip select (CS) line. The SI/O pin enters tri-state when CS is high, preventing bus contention. This daisy-chain capability supports distributed thermal monitoring across ECUs, battery modules, or ADAS subsystems using minimal GPIO resources on the host controller.
LM95071QIMFX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -40°C ~ 150°C
- Sensing Temperature - Remote:
- -
- Output Type:
- SPI
- Voltage - Supply:
- 2.4V ~ 5.5V
- Resolution:
- 13 b
- Features:
- Shutdown Mode
- Accuracy - Highest (Lowest):
- ±1°C (±2°C)
- Test Condition:
- 0°C ~ 70°C (-40°C ~ 150°C)
- Operating Temperature:
- -40°C ~ 150°C
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- SOT-23-5
LM95071QIMFX/NOPB FAQ
1.How can I place an order for LM95071QIMFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM95071QIMFX/NOPB 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 LM95071QIMFX/NOPB reliable?
The price and inventory of LM95071QIMFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM95071QIMFX/NOPB is usually 5 days.
3.What payment methods are accepted for LM95071QIMFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM95071QIMFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM95071QIMFX/NOPB?
LM95071QIMFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM95071QIMFX/NOPB 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 LM95071QIMFX/NOPB?
For technical support, including LM95071QIMFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM95071QIMFX/NOPB requirements.
6.How does Aetrix verify that LM95071QIMFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM95071QIMFX/NOPB 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 LM95071QIMFX/NOPB meets industry standards.
7.What is the process for return or replacement of LM95071QIMFX/NOPB?
All LM95071QIMFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM95071QIMFX/NOPB, 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 LM95071QIMFX/NOPB part is unused and in its original packaging.
Return procedure for LM95071QIMFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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