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Texas Instruments LMT01LPG
- Part No.:
- LMT01LPG
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- TO-226-2, TO-92-2 (TO-226AC)
- Datasheet:
-
LMT01LPG.pdf
- Description:
- SENSOR DIGITAL -50C-150C TO92-2
- Quantity:
- Payment:
- Shipping:
Inventory:1,942
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Product details
Overview
LMT01LPG from Texas Instruments is a high-accuracy 2-pin digital output temperature sensor with pulse count interface, operating across –50°C to +150°C, delivering ±0.5°C max accuracy from –20°C to 90°C and 0.0625°C resolution per pulse. It functions as a self-contained, floating-current-loop temperature transducer directly interfaced to MCU GPIO or comparator inputs in wired probe and industrial sensing applications.
For engineers reviewing the LMT01LPG datasheet, LMT01LPG pinout, LMT01LPG application, or LMT01LPG equivalent, this page delivers verified technical context, real-world timing behavior, package-specific thermal response, pulse-to-temperature mapping, and validated alternative options for temperature-sensing system design.
Technical Context
The LMT01LPG implements a ΣΔ ADC driven by an internal voltage reference, sampling temperature via an on-die thermal diode. Its output is converted into a current-mode pulse train (34 µA low / 125 µA high) with fixed 88 kHz nominal frequency and 46–54 ms conversion time.
It operates with floating 2.0 V to 5.5 V (VP–VN) supply, requires no external clock or calibration, and delivers pulse counts mapped to temperature via a factory-characterized LUT-enabling direct counting without firmware compensation over its full –50°C to 150°C range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Range | –50°C to +150°C operating; enables use in HVAC, battery packs, and power supply hot spots. |
| Accuracy (–20°C to 90°C) | ±0.5°C maximum; eliminates need for system-level calibration in consumer and industrial grade applications. |
| Pulse Resolution | 0.0625°C per pulse; supports precise thermal monitoring with integer counter logic only. |
| Conversion + Transmission Time | ≤104 ms total cycle; ensures deterministic timing for real-time thermal control loops. |
| Supply Voltage Range | 2.0 V to 5.5 V (VP–VN); compatible with 3.3 V and 5 V systems, including battery-powered probes up to 2 m wire length. |
| Output Current Levels | 34 µA (low) / 125 µA (high); generates clean 340 mV–1.25 V swing across 10 kΩ pull-up for direct GPIO/comparator interfacing. |
| EMI Immunity | Integrated suppression; allows reliable operation in noisy motor drives and switching power supplies without shielding. |
Pinout & Package
TO-92 (LPG) package: 3.1 mm × 4.0 mm × 1.5 mm body, axial leaded, through-hole mount. Two-terminal architecture eliminates ground reference dependency and simplifies PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VP | Positive voltage terminal | Connects to system supply or bias resistor; regulates internal VDD for ADC and interface circuitry. |
| VN | Negative voltage terminal | Serves as current-sink output node; forms closed loop with VP to generate pulse-count current waveform. |
Key Features
| Feature | Design Value |
|---|---|
| 2-pin pulse-count interface | Eliminates I²C/SPI bus overhead and dedicated ADC resources-only one GPIO or comparator input required. |
| Factory-calibrated LUT | Enables accurate temperature decoding across full range using linear interpolation-no host MCU firmware compensation needed. |
| Floating supply operation | Supports isolated or remote sensing topologies where VN is not tied to system ground (e.g., floating battery cells). |
| Stirred-oil thermal response | 0.8 s to 63% final value (LPG package); faster than thermistors, enabling responsive thermal feedback in dynamic environments. |
| Wettable flank–compatible TO-92 | Facilitates automated optical inspection (AOI) of solder joints-critical for high-reliability industrial manufacturing. |
Applications
| Digital Wired Probes | HVAC Systems |
|---|---|
Use Scenario: Temperature sensing in refrigerant lines or duct-mounted probes with up to 2 m cable run. IC Role / Device Role / Timing Role: Self-timed pulse generator providing absolute temperature data over unshielded twisted pair. Use Value: EMI-immune current-loop output maintains signal integrity without differential receivers or shielded cabling. |
Use Scenario: Air inlet/outlet and heat exchanger monitoring in residential and commercial HVAC units. IC Role / Device Role / Timing Role: Standalone temperature transducer feeding data to microcontroller via GPIO counter interrupt. Use Value: ±0.5°C accuracy at room-to-mild-heat range reduces thermostat hysteresis and improves energy efficiency. |
| Power Supply Thermal Monitoring | Battery Pack Management |
Use Scenario: Hot-spot sensing on DC-DC converter MOSFETs or transformer windings in telecom and server PSUs. IC Role / Device Role / Timing Role: Direct-mount temperature sensor with fast thermal response (0.8 s oil, 28 s still air) for overtemperature shutdown. Use Value: 104 ms full-cycle timing enables rapid fault detection before thermal runaway occurs. |
Use Scenario: Cell-level or module-level temperature measurement in Li-ion battery packs for EVs and energy storage. IC Role / Device Role / Timing Role: Floating 2-pin sensor placed between cells, powered from local bias-not referenced to pack ground. Use Value: 2.0 V minimum VP–VN supports operation during deep discharge while maintaining ±0.625°C accuracy up to 150°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital-output temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX31820 | 1-Wire interface, 3-pin SOIC package, ±0.5°C accuracy only at 0°C–70°C; requires pull-up and bus arbitration. | Best suited for multi-sensor daisy-chained networks-not optimized for single-point, noise-immune, long-cable deployments. | Select when leveraging existing 1-Wire infrastructure; avoid if EMI immunity or 2-wire simplicity is critical. |
| DS18B20 | Parasitic-power capable, ±0.5°C accuracy over –10°C to +85°C only; 1-Wire protocol adds software overhead and timing constraints. | Preferred for low-cost consumer nodes with short traces; lacks LMT01LPG's wide-range accuracy and current-loop noise rejection. | Choose for cost-sensitive, low-channel-count applications where firmware complexity and noise are not primary concerns. |
Compared with MAX31820 and DS18B20, the LMT01LPG provides superior EMI robustness, wider guaranteed accuracy range (–50°C to 150°C), and simpler hardware integration-requiring only a resistor and counter-making it optimal for industrial and automotive-adjacent thermal monitoring.
Availability
LMT01LPG is available at Aetrix Electronics and suitable for digital wired probes, HVAC thermal feedback, and power supply hot-spot monitoring requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for LMT01LPG 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 precision sensing, power management, and signal chain solutions.
The LMT01LPG belongs to TI's high-accuracy 2-pin temperature sensor product line, designed specifically for noise-immune, low-component-count thermal measurement in harsh electrical environments-including motor drives, power converters, and remote probes.
FAQ
What is the operating temperature range of the LMT01LPG?
The LMT01LPG operates across –50°C to +150°C. Its accuracy is specified as ±0.5°C maximum from –20°C to 90°C, ±0.625°C from 90°C to 150°C, and ±0.7°C from –50°C to –20°C. This full-range specification is validated per the Electrical Characteristics table and LUT in the official SNIS189D datasheet, making LMT01LPG suitable for under-hood automotive-adjacent and industrial power electronics applications.
How does the LMT01LPG interface with a microcontroller?
The LMT01LPG interfaces using a 2-pin current-loop pulse train: VP and VN connect across a pull-up resistor (e.g., 10 kΩ), generating 340 mV–1.25 V logic-compatible voltage swings. A GPIO pin configured as an input or a comparator detects these pulses; a simple counter gated for 104 ms captures the total pulse count. The LMT01LPG requires no clock, I²C, or SPI-reducing firmware overhead and eliminating bus contention issues.
What is the conversion time and update rate of the LMT01LPG?
The LMT01LPG completes temperature conversion in 46–54 ms and transmits the result in ≤50 ms, yielding a maximum full-cycle time of 104 ms. This means the LMT01LPG updates temperature data up to ~9.6 Hz. The timing is deterministic and independent of host processor activity-critical for closed-loop thermal control where jitter or latency must be bounded.
Can the LMT01LPG be used with long cables, and what is the maximum recommended length?
Yes-the LMT01LPG is explicitly rated for use with up to 2 meters of wire in digital wired probe configurations. Its current-loop output and integrated EMI suppression maintain signal integrity over unshielded cables. Performance remains stable provided the VP–VN voltage stays ≥2.0 V during transmission and ≥2.15 V during conversion, as confirmed in Section 6.3 of the SNIS189D datasheet for LMT01LPG.
Does the LMT01LPG require calibration or compensation in the host system?
No-LMT01LPG is factory calibrated and provides temperature data via a pulse count mapped to a published Look-Up Table (LUT). Accuracy is achieved without host-side linearization, offset/gain correction, or software compensation. For highest precision, linear interpolation of the LUT values (Section 6.6) is recommended-but even first-order calculation yields <±0.7°C error across the full range.
LMT01LPG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-226-2, TO-92-2 (TO-226AC)
- Packaging:
- Bulk
- Product Status:
- Active
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -50°C ~ 150°C
- Sensing Temperature - Remote:
- -
- Output Type:
- Pulse Count
- Voltage - Supply:
- 2V ~ 5.5V
- Resolution:
- 0.0625°C
- Features:
- -
- Accuracy - Highest (Lowest):
- ±0.5°C (±0.6875°C)
- Test Condition:
- -20°C ~ 90°C (-50°C)
- Operating Temperature:
- -50°C ~ 150°C
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- TO-92-2
LMT01LPG FAQ
1.How can I place an order for LMT01LPG through Aetrix?
Please submit a Request for Quotation (RFQ) for LMT01LPG 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 LMT01LPG reliable?
The price and inventory of LMT01LPG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMT01LPG is usually 5 days.
3.What payment methods are accepted for LMT01LPG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMT01LPG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMT01LPG?
LMT01LPG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMT01LPG 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 LMT01LPG?
For technical support, including LMT01LPG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMT01LPG requirements.
6.How does Aetrix verify that LMT01LPG is sourced from the original manufacturer or authorized distributors?
All LMT01LPG 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 LMT01LPG meets industry standards.
7.What is the process for return or replacement of LMT01LPG?
All LMT01LPG units undergo pre-shipment inspection (PSI). If there is an issue with LMT01LPG, 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 LMT01LPG part is unused and in its original packaging.
Return procedure for LMT01LPG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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