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Texas Instruments LM70CILD-3/NOPB
- Part No.:
- LM70CILD-3/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LM70CILD-3/NOPB.pdf
- Description:
- SENSOR DIGITAL -55C-150C 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,603
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Product details
Overview
LM70CILD-3/NOPB from Texas Instruments is a SPI/MICROWIRE-compatible 10-bit plus sign digital temperature sensor in an 8-pin WSON package, delivering 0.25°C resolution over −55°C to +150°C, with supply current as low as 12 μA in shutdown mode and 260 μA typical in operation - used for real-time thermal monitoring in disk drives and embedded controllers.
For engineers reviewing the LM70CILD-3/NOPB datasheet, LM70CILD-3/NOPB pinout, LM70CILD-3/NOPB application, or LM70CILD-3/NOPB equivalent, key selection criteria include its SPI/MICROWIRE interface compatibility, −55°C to +150°C operating range, 0.25°C LSB resolution, shutdown current <10 μA, and WSON-8 thermal performance with θJA = 51.3°C/W on 2 oz. copper PCBs.
Technical Context
The LM70CILD-3/NOPB integrates a band-gap temperature sensor and a ΔΣ ADC with 11-bit two's complement output (10 bits + sign), where each LSB equals 0.25°C. It operates in continuous conversion or shutdown mode, controlled via an 8-bit write-only configuration register.
Its SPI/MICROWIRE interface uses three wires (SI/O, SC, CS) with Schmitt-trigger inputs, supports 32-clock full-duplex communication, and outputs temperature data on the falling edge of SC while sampling input on the rising edge - enabling direct connection to microcontrollers without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 11-bit two's complement (10 bits + sign); 0.25°C per LSB - enables precise thermal threshold detection at firmware level. |
| Temperature Range | −55°C to +150°C - supports industrial, automotive under-hood, and high-reliability storage applications. |
| Accuracy | +3.5°C/−2.0°C max over −55°C to +150°C - includes error contribution from ±10% V+ variation. |
| Supply Voltage | 2.65V to 5.5V - compatible with 3.3V and 5V logic domains without external regulators. |
| Quiescent Current | 260 μA typical (490 μA max) active; 12 μA typical shutdown - extends battery life in portable thermal monitors. |
| Interface | SPI/MICROWIRE 3-wire (SI/O, SC, CS); no external clock required - simplifies host-side driver implementation. |
| Conversion Time | 210 ms max - defines minimum polling interval for real-time thermal response. |
Pinout & Package
LM70CILD-3/NOPB is housed in an 8-pin WSON package (NGK0008A), 3.0 mm × 3.0 mm × 0.75 mm, with exposed thermal pad for enhanced PCB heat dissipation and θJA = 51.3°C/W on 2 oz. copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SI/O | Serial I/O bidirectional data line | Tri-state capable; transmits temperature data on falling SC edge, receives config commands on rising SC edge. |
| SC | Serial clock input | Schmitt-triggered; accepts 0.16 μs min period; timing-critical for reliable 32-clock frame synchronization. |
| GND | Power supply ground | Primary thermal path to die; must be connected to large copper pour for accuracy and stability. |
| V+ | Positive supply voltage | 2.65V–5.5V input; requires 0.1 μF ceramic bypass capacitor placed near pin for noise immunity. |
| CS | Chip select input | Active-low enable; initiates communication and controls tri-state behavior of SI/O pin. |
| NC | No connect | Pins 2, 4, 6 are unconnected internally - must remain floating or grounded per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| 0.25°C temperature resolution | Enables fine-grained thermal control loops and accurate trip-point setting in fan-speed or power-throttling algorithms. |
| Shutdown mode <10 μA | Reduces average system power in intermittently sampled thermal monitoring, e.g., wake-on-temperature in IoT sensors. |
| SPI/MICROWIRE bus compatibility | Eliminates need for protocol translation ICs; interoperable with standard MCU SPI peripherals using software-configurable clock polarity/phase. |
| UL Recognized Component | Meets UL 60950-1 requirements for end-equipment safety certification without additional isolation components. |
| −55°C to +150°C operating range | Validated for use in harsh environments including server chassis hotspots, industrial motor controllers, and automotive ECUs. |
Applications
| Hard Disk Drive Thermal Protection | Industrial PLC Temperature Monitoring |
|---|---|
|
Use Scenario: Real-time monitoring of spindle motor and controller IC junction temperature during sustained read/write operations. IC Role / Device Role / Timing Role: Digital temperature sensor providing 11-bit two's complement output via SPI to host controller every 210 ms. Use Value: Enables dynamic throttling before thermal shutdown, preserving data integrity and extending drive lifetime. |
Use Scenario: Ambient and module-level temperature sensing inside programmable logic controller enclosures exposed to factory floor conditions. IC Role / Device Role / Timing Role: Standalone temperature node interfaced to ARM Cortex-M4-based mainboard via MICROWIRE-compatible serial bus. Use Value: Delivers ±2.0°C accuracy from −40°C to +85°C without calibration, reducing firmware compensation overhead. |
| Server CPU Proximity Sensing | Laptop Battery Pack Thermal Management |
|
Use Scenario: Placement adjacent to CPU VRM and memory modules to detect localized hot spots during compute-intensive workloads. IC Role / Device Role / Timing Role: SPI slave reporting die temperature every 210 ms; integrated into SMBus-compatible thermal management firmware. Use Value: Supports predictive fan control and dynamic voltage/frequency scaling (DVFS) with sub-degree resolution. |
Use Scenario: Embedded within smart battery packs to monitor cell stack temperature during charge/discharge cycles. IC Role / Device Role / Timing Role: Low-power temperature node operating in shutdown mode between 1-second polling intervals. Use Value: Achieves <12 μA shutdown current, minimizing self-discharge impact on battery runtime metrics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6602ESA+ | 12-bit resolution (0.0625°C), I²C interface only, 2.7V–5.5V supply, ±2°C accuracy over −55°C to +125°C. | Requires I²C host; lacks SPI/MICROWIRE compatibility and extended +150°C range. | Select when higher resolution and I²C infrastructure exist; not suitable for SPI-only systems or >125°C operation. |
| ADT7301ARMZ | 13-bit resolution (0.0625°C), SPI interface, 2.7V–5.5V, ±1°C accuracy over −40°C to +125°C, internal 2.5V reference. | Narrower temperature range, higher accuracy but no shutdown mode below 100 μA; larger MSOP-8 package. | Prefer for precision measurement in commercial ambient ranges; avoid where extended range or ultra-low shutdown current is critical. |
Compared with MAX6602ESA+ and ADT7301ARMZ, LM70CILD-3/NOPB uniquely balances wide −55°C to +150°C operation, SPI/MICROWIRE flexibility, and sub-10 μA shutdown - making it optimal for cost-sensitive, thermally demanding embedded systems where interface compatibility and power efficiency are jointly constrained.
Availability
LM70CILD-3/NOPB is available at Aetrix Electronics and suitable for hard disk drives, industrial PLCs, server thermal management, and laptop battery packs requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LM70CILD-3/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 leader focused on analog and embedded processing technologies, with decades of expertise in precision sensing and low-power signal conditioning.
The LM70CILD-3/NOPB belongs to TI's precision analog temperature sensor family, designed specifically for embedded thermal monitoring where SPI interface simplicity, wide operating range, and ultra-low shutdown current are essential.
FAQ
What is the operating temperature range of the LM70CILD-3/NOPB?
The LM70CILD-3/NOPB operates from −55°C to +150°C. Its temperature accuracy is specified as +3.5°C/−2.0°C maximum over this full range, with tighter tolerances available in narrower bands (e.g., ±2.0°C from −40°C to +85°C). This range is validated per JEDEC JESD22-A108 and supported by TI's thermal resistance characterization (θJA = 51.3°C/W).
Does the LM70CILD-3/NOPB support both SPI and MICROWIRE protocols?
Yes, the LM70CILD-3/NOPB supports both SPI and MICROWIRE protocols natively. It uses a 3-wire interface (SI/O, SC, CS) with Schmitt-trigger inputs and complies with timing requirements for both standards - including clock polarity/phase independence and 32-clock frame structure - allowing seamless integration with common microcontroller SPI peripherals.
What is the shutdown current specification for the LM70CILD-3/NOPB?
The LM70CILD-3/NOPB draws 12 μA typical (≤10 μA guaranteed) in shutdown mode. Shutdown is activated by writing 0xFF to the configuration register via the serial interface. In this state, the device maintains bus responsiveness while reducing quiescent current by >95% compared to active operation (260 μA typical).
How is temperature data formatted in the LM70CILD-3/NOPB?
Temperature data from the LM70CILD-3/NOPB is delivered as an 11-bit two's complement word (10 data bits + sign bit), where 1 LSB = 0.25°C. The most significant byte is transmitted first. For example, 0°C maps to 0x001F, +25°C to 0x0B9F, and −25°C to 0xF39F - enabling direct integer arithmetic in host firmware without floating-point conversion.
What package type does the LM70CILD-3/NOPB use, and what are its thermal characteristics?
The LM70CILD-3/NOPB uses an 8-pin WSON package (NGK0008A), 3.0 mm × 3.0 mm × 0.75 mm, with exposed thermal pad. On a PCB with 2 oz. copper, its junction-to-ambient thermal resistance (θJA) is 51.3°C/W - significantly lower than the VSSOP variant (200°C/W) - enabling more accurate die temperature tracking in thermally constrained layouts.
LM70CILD-3/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -55°C ~ 150°C
- Sensing Temperature - Remote:
- -
- Output Type:
- SPI
- Voltage - Supply:
- 2.65V ~ 5.5V
- Resolution:
- 10 b
- Features:
- Shutdown Mode
- Accuracy - Highest (Lowest):
- 1.5°C (-2°C, 3°C)
- Test Condition:
- -10°C ~ 65°C (-55°C ~ 150°C)
- Operating Temperature:
- -55°C ~ 150°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-WSON (3x3)
LM70CILD-3/NOPB FAQ
1.How can I place an order for LM70CILD-3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM70CILD-3/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 LM70CILD-3/NOPB reliable?
The price and inventory of LM70CILD-3/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM70CILD-3/NOPB is usually 5 days.
3.What payment methods are accepted for LM70CILD-3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM70CILD-3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM70CILD-3/NOPB?
LM70CILD-3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM70CILD-3/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 LM70CILD-3/NOPB?
For technical support, including LM70CILD-3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM70CILD-3/NOPB requirements.
6.How does Aetrix verify that LM70CILD-3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM70CILD-3/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 LM70CILD-3/NOPB meets industry standards.
7.What is the process for return or replacement of LM70CILD-3/NOPB?
All LM70CILD-3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM70CILD-3/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 LM70CILD-3/NOPB part is unused and in its original packaging.
Return procedure for LM70CILD-3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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