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Texas Instruments LM95071CIMF
- Part No.:
- LM95071CIMF
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM95071CIMF.pdf
- Description:
- SENSOR DIGITAL -40C-150C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,885
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Product details
Overview
LM95071CIMF from Texas Instruments is a 13-bit-plus-sign SPI/MICROWIRE digital temperature sensor in a 5-pin SOT-23 package, delivering ±1°C accuracy from 0°C to 70°C and ±2°C from −40°C to +150°C, with 0.03125°C resolution and 280 µA typical operating current. It serves as a system-level thermal monitor in embedded host interfaces requiring low-power, high-resolution temperature feedback.
For engineers reviewing the LM95071CIMF datasheet, LM95071CIMF pinout, LM95071CIMF application, or LM95071CIMF equivalent, key selection criteria include its SPI/MICROWIRE compatibility, −40°C to +150°C operating range, shutdown mode (6 µA), 2.4 V to 5.5 V supply tolerance, and SOT-23 footprint suitability for space-constrained thermal management designs.
Technical Context
The LM95071CIMF implements a 14-bit delta-sigma ADC with two's complement output format, where one LSB equals 0.03125°C. Its serial interface operates in slave mode, clocking data out on SC falling edges and sampling input on rising edges - fully compatible with both SPI and MICROWIRE timing conventions.
It supports two functional modes: continuous conversion (default at power-up) and shutdown (entered via 16-bit write of XX FFhex). In shutdown, it outputs a fixed 16-bit Manufacturer/Device ID (1000 0000 0000 1111), while retaining active serial bus responsiveness for ID readback without interrupting host communication flow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.4 V to 5.5 V - supports direct connection to common logic rails (3.3 V or 5 V) without external regulation |
| Temperature Range | −40°C to +150°C - enables use in automotive under-hood, industrial motor control, and high-temp computing environments |
| Accuracy | ±1°C (0°C to 70°C), ±2°C (−40°C to +150°C) - eliminates need for system-level calibration in most embedded applications |
| Resolution | 0.03125°C per LSB - detects sub-degree thermal drift critical for fan speed control and thermal throttling algorithms |
| Operating Current | 280 µA typical - allows battery-powered or always-on monitoring with minimal impact on system power budget |
| Shutdown Current | 6 µA typical - extends runtime in portable devices during idle thermal sampling intervals |
| Conversion Time | 228 ms maximum - defines minimum polling interval for stable, full-range temperature updates |
Pinout & Package
LM95071CIMF is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for PCB area efficiency and reflow-compatible assembly. Pin 1 is CS (chip select), Pin 2 is GND, Pin 3 is SI/O (bidirectional serial data), Pin 4 is SC (serial clock), and Pin 5 is VDD (supply).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable signal; must be held high ≥160 ns between transactions to prevent bus contention |
| GND | Power and signal ground | Common reference for VDD, digital I/O, and internal ADC - requires low-impedance return path |
| SI/O | Serial Input/Output | Bidirectional data line with Schmitt-trigger input; transmits temperature data on falling SC edge, receives commands on rising SC edge |
| SC | Serial Clock input | Synchronous timing source from host; Schmitt-trigger input ensures noise immunity up to 6.25 MHz (t1 = 160 ns min) |
| VDD | Positive supply | DC input (2.4–5.5 V); requires local 0.1 µF ceramic bypass capacitor to GND for stable ADC operation |
Key Features
| Feature | Design Value |
|---|---|
| 13-bit-plus-sign ΔΣ ADC | Delivers 0.03125°C resolution with inherent noise rejection for stable thermal readings in electrically noisy systems |
| SPI/MICROWIRE compatibility | Eliminates need for protocol translation logic - interoperates directly with MSP432P4, C2000, and other TI microcontrollers |
| Programmable shutdown mode | Reduces quiescent current to 6 µA while preserving bus readiness for immediate wake-up and ID readback |
| Manufacturer/Device ID register | Enables firmware validation and BOM traceability via fixed 16-bit response (1000 0000 0000 1111) in shutdown state |
| Two's complement output format | Supports signed arithmetic in host firmware without bit manipulation - simplifies temperature difference calculations |
Applications
| Server CPU Thermal Monitoring | Industrial Motor Drive Control |
|---|---|
Use Scenario: Real-time die temperature tracking of multi-core processors during peak computational load. IC Role / Device Role / Timing Role: System-level temperature sensor providing asynchronous, host-pollable thermal feedback to BMC or host MCU. Use Value: Enables dynamic fan speed adjustment and core throttling before thermal trip thresholds are exceeded. | Use Scenario: Continuous junction temperature monitoring of IGBT gate drivers in variable-frequency drives. IC Role / Device Role / Timing Role: High-accuracy analog-to-digital thermal transducer interfacing directly to motor control MCU via SPI. Use Value: Prevents thermal runaway by triggering derating or shutdown when winding or heatsink temperatures exceed 125°C. |
| Portable Medical Diagnostic Device | Automotive Cabin Climate Controller |
Use Scenario: Battery-powered handheld ultrasound unit requiring low-quiescent-current thermal supervision. IC Role / Device Role / Timing Role: Standby-mode temperature supervisor that wakes only during scheduled health checks. Use Value: Extends battery life by reducing average current draw to <10 µA using programmable shutdown between 2-second reads. | Use Scenario: HVAC control module measuring ambient cabin air temperature near dashboard vents. IC Role / Device Role / Timing Role: Precision ambient sensor feeding closed-loop PID algorithm in automotive-grade microcontroller. Use Value: Maintains ±0.5°C cabin setpoint stability across −40°C to +85°C vehicle operating conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6602ASA+ | 8-pin SOIC package; 12-bit resolution (0.25°C); 3.0 V to 5.5 V supply; SMBus interface only | Lacks SPI/MICROWIRE compatibility; requires pull-up resistors and SMBus-aware firmware stack | Choose for legacy SMBus systems where board layout already accommodates SOIC footprint and higher resolution is not required |
| ADT7310TRZ-REEL7 | 16-pin LFCSP; 16-bit resolution (0.0078°C); 2.7 V to 5.5 V; SPI-only interface; ±0.25°C accuracy (−40°C to +125°C) | Higher precision and smaller package but significantly higher cost and tighter layout constraints | Choose when sub-degree accuracy is mandatory and PCB real estate permits LFCSP placement and thermal isolation |
Compared with MAX6602ASA+ and ADT7310TRZ-REEL7, the LM95071CIMF offers optimal balance of SOT-23 size, SPI/MICROWIRE flexibility, and ±2°C full-range accuracy - making it ideal for cost-sensitive, space-constrained thermal monitoring where 0.03125°C resolution suffices and SMBus infrastructure is absent.
Availability
LM95071CIMF is available at Aetrix Electronics and suitable for server thermal management, industrial motor drives, portable medical diagnostics, and automotive cabin climate control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM95071CIMF 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 headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 90 years of innovation in precision sensing and low-power design.
The LM95071CIMF belongs to TI's precision temperature sensor product line, engineered specifically for high-reliability, low-power thermal monitoring in space-constrained embedded systems where SPI/MICROWIRE interoperability and wide operating temperature range are essential.
FAQ
What is the absolute maximum supply voltage rating for the LM95071CIMF?
The LM95071CIMF has an absolute maximum supply voltage (VDD) rating of 6 V. Exceeding this value may cause permanent damage. The recommended operating range remains 2.4 V to 5.5 V, and operation above 5.5 V voids functional guarantees even if below 6 V. Always observe the 0.1 µF ceramic bypass capacitor requirement at VDD to ensure transient stability.
Does the LM95071CIMF support true SPI mode with separate MISO and MOSI lines?
No, the LM95071CIMF uses a three-wire SPI/MICROWIRE interface with a single bidirectional SI/O pin - not separate MISO and MOSI lines. Data is clocked out on SC falling edges and sampled in on rising edges. This shared-line architecture reduces PCB routing complexity but requires careful timing alignment per the t6, t7, and t8 specifications in the datasheet.
How does the LM95071CIMF enter shutdown mode, and what happens to the SI/O pin during shutdown?
The LM95071CIMF enters shutdown mode by writing any 16-bit value ending in FFhex (e.g., 00FFhex) to its configuration register. During shutdown, the SI/O pin remains active and outputs the fixed 16-bit Manufacturer/Device ID (1000 0000 0000 1111) - enabling firmware verification without exiting low-power state. The device draws only 6 µA typical current.
What is the meaning of "13-bit plus sign" in the LM95071CIMF datasheet specification?
"13-bit plus sign" refers to a 14-bit two's complement representation: 1 sign bit + 13 magnitude bits. This yields a total of 16,384 discrete values spanning −8192 to +8191 in integer code space, scaled to 0.03125°C per LSB. The LM95071CIMF outputs full 16-bit words, with D15 as sign bit and D0–D12 encoding temperature magnitude - matching standard signed integer interpretation in host firmware.
Can the LM95071CIMF be used in automotive under-hood applications?
Yes, the LM95071CIMF is rated for −40°C to +150°C operation and features robust ESD protection (±2000 V HBM, ±250 V CDM), making it suitable for non-safety-critical automotive under-hood locations such as engine bay ambient sensing or transmission fluid temperature monitoring. For ASIL-B/C applications, TI recommends the automotive-qualified LM95071-Q1 variant instead of the LM95071CIMF.
LM95071CIMF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- 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:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-5
LM95071CIMF FAQ
1.How can I place an order for LM95071CIMF through Aetrix?
Please submit a Request for Quotation (RFQ) for LM95071CIMF 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 LM95071CIMF reliable?
The price and inventory of LM95071CIMF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM95071CIMF is usually 5 days.
3.What payment methods are accepted for LM95071CIMF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM95071CIMF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM95071CIMF?
LM95071CIMF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM95071CIMF 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 LM95071CIMF?
For technical support, including LM95071CIMF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM95071CIMF requirements.
6.How does Aetrix verify that LM95071CIMF is sourced from the original manufacturer or authorized distributors?
All LM95071CIMF 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 LM95071CIMF meets industry standards.
7.What is the process for return or replacement of LM95071CIMF?
All LM95071CIMF units undergo pre-shipment inspection (PSI). If there is an issue with LM95071CIMF, 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 LM95071CIMF part is unused and in its original packaging.
Return procedure for LM95071CIMF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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