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Texas Instruments LMT01LPGM
- Part No.:
- LMT01LPGM
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- TO-226-2, TO-92-2 (TO-226AC)
- Datasheet:
-
LMT01LPGM.pdf
- Description:
- SENSOR DIGITAL -40C-150C TO92-2
- Quantity:
- Payment:
- Shipping:
Inventory:4,660
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Product details
Overview
LMT01LPGM from Texas Instruments is a high-accuracy 2-pin digital output temperature sensor with pulse count interface, operating across –50°C to +150°C with ±0.5°C max error (–20°C to 90°C), 0.0625°C resolution, and 88 kHz output pulse frequency - used in wired probe and industrial thermal monitoring applications.
For engineers reviewing the LMT01LPGM datasheet, LMT01LPGM pinout, LMT01LPGM application, or LMT01LPGM equivalent, this page delivers verified technical context, real-world timing behavior, package-specific accuracy curves, GPIO-compatible current-loop interface details, and validated alternative options for temperature sensing in noisy or space-constrained environments.
Technical Context
The LMT01LPGM uses an internal thermal diode and ΣΔ ADC with integrated voltage regulator to convert junction temperature into a proportional pulse count current output. Its floating 2.0 V to 5.5 V (VP–VN) supply enables operation across wide input ranges without external regulation.
Each pulse represents 0.0625°C; total pulse count ranges from 15 (–50°C) to 3228 (150°C) per TO-92/LPG LUT. Conversion + transmission completes every 104 ms max, with 34 µA quiescent current during measurement and 125 µA high-level pulses at 88 kHz nominal frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy (–20°C to 90°C) | ±0.5°C maximum - enables uncalibrated system-level temperature measurement without software compensation |
| Resolution | 0.0625°C per pulse - supports fine-grained thermal control in battery management and HVAC feedback loops |
| Output Interface | Pulse-count current loop (34 µA / 125 µA) - directly interfaces to MCU GPIO or comparator without ADC or level-shifting circuitry |
| Conversion Cycle Time | 104 ms maximum (46 ms conversion + 50 ms data transmission) - defines minimum sampling interval for continuous monitoring |
| Supply Range (VP–VN) | 2.0 V to 5.5 V - supports direct connection to 3.3 V or 5 V rails and enables 2-wire probe designs up to 2 m |
| Package | TO-92/LPG (3.1 mm × 4 mm × 1.5 mm) - half-size of standard TO-92, optimized for compact probe housings and PCB edge mounting |
| EMI Immunity | Integrated suppression - maintains reliable pulse counting in electrically noisy environments like motor drives and power supplies |
Pinout & Package
TO-92/LPG package: 2-pin through-hole device with VP (positive supply terminal) and VN (output/return terminal); body size 3.1 mm × 4 mm × 1.5 mm; wettable flanks for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VP | Positive supply terminal | Accepts 2.0–5.5 V bias; internally regulates chip VDD for ADC and logic - connects to system rail or pull-up resistor in 2-wire probe configurations |
| VN | Current-sink output terminal | Delivers 34 µA (low) / 125 µA (high) pulse train; referenced to system ground - forms current loop with external load resistor for voltage translation to GPIO/comparator |
Key Features
| Feature | Design Value |
|---|---|
| 2-pin architecture | Eliminates need for separate ground or data lines - reduces wiring cost and EMI susceptibility in remote probe assemblies |
| Pulse count linearity | 0.0625°C/pulse with LUT-based interpolation - achieves ±0.5°C accuracy over –20°C to 90°C without factory calibration or host-side linearization |
| Floating supply operation | VP–VN differential range supports 2.0–5.5 V - enables direct integration into existing 3.3 V or 5 V systems without voltage translation |
| EMI-hardened interface | Integrated noise rejection - sustains reliable pulse counting in automotive engine bays, industrial inverters, and switch-mode power supply zones |
| Thermal response (stirred oil) | 0.8 s to 63% of final value - suitable for fast-cycling thermal events in battery pack hot-spot detection and compressor monitoring |
Applications
| Digital Output Wired Probes | White Goods |
|---|---|
Use Scenario: Embedded in stainless-steel probe housings for refrigerant line or oven cavity temperature monitoring with up to 2 m cable length. IC Role / Device Role / Timing Role: Primary temperature transducer delivering calibrated digital pulse output via 2-wire current loop. Use Value: Eliminates signal degradation over long wires; 0.0625°C resolution enables precise defrost cycle control and energy optimization. |
Use Scenario: Monitoring compressor discharge, evaporator coil, and control board ambient in refrigerators and washing machines. IC Role / Device Role / Timing Role: High-accuracy local sensor interfacing directly to MCU GPIO pins without ADC resources. Use Value: ±0.5°C accuracy ensures consistent ice-making performance and prevents false overheat shutdowns in variable-speed motors. |
| HVAC Systems | Battery Management |
Use Scenario: Duct-mounted thermal sensor feeding zone temperature data to HVAC controller in commercial buildings. IC Role / Device Role / Timing Role: Off-board temperature node communicating via simple current-loop interface over twisted-pair wiring. Use Value: Floating 2–5.5 V supply allows direct use of 24 V HVAC control bus; EMI immunity prevents false readings near fan motors and relays. |
Use Scenario: Cell-can surface monitoring in Li-ion battery packs for EVs and energy storage systems. IC Role / Device Role / Timing Role: Compact TO-92/LPG form factor enables direct attachment to cylindrical cell cans with minimal thermal mass. Use Value: 0.8 s oil-response time correlates closely with cell thermal dynamics; ±0.5°C accuracy supports safe charge/discharge envelope enforcement. |
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 digital interface (not current-loop); requires pull-up resistor and dedicated 1-Wire bus; ±0.5°C accuracy over –55°C to +125°C | Needs microcontroller 1-Wire stack support; less noise-immune than LMT01LPGM's current-loop in high-EMI settings | Select when bus sharing with other 1-Wire sensors is required and layout permits controlled impedance routing |
| LMT01DQX | Same core functionality and accuracy; WSON-2 (1.7 mm × 2.5 mm) surface-mount package; identical pulse-count transfer function and timing | Designed for PCB-integrated sensing rather than cabled probes; lacks TO-92 mechanical robustness for field-replaceable assemblies | Select when space-constrained PCB mounting is prioritized over field-serviceable probe integration |
Compared with MAX31820 and LMT01DQX, the LMT01LPGM uniquely combines TO-92 mechanical durability, intrinsic EMI resilience via current-loop signaling, and drop-in compatibility with any GPIO-capable MCU - making it optimal for ruggedized 2-wire probe deployments where reliability outweighs bus flexibility or footprint minimization.
Availability
LMT01LPGM is available at Aetrix Electronics and suitable for digital output wired probes, white goods thermal control, HVAC duct monitoring, battery pack surface sensing, and industrial power supply temperature feedback requiring stable component supply and long-lifecycle support.
Supply support for LMT01LPGM 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 LMT01LPGM belongs to TI's precision analog temperature sensor product line, engineered specifically for high-accuracy, low-component-count thermal measurement in electrically noisy, space-constrained, or long-cable industrial and consumer applications.
FAQ
What is the operating temperature range of the LMT01LPGM?
The LMT01LPGM operates across –50°C to +150°C. Its maximum accuracy specification is ±0.5°C over –20°C to 90°C, ±0.625°C from 90°C to 150°C, and ±0.7°C from –50°C to –20°C. Operation beyond 150°C risks permanent damage, and the device is not characterized above that point. All accuracy values are validated per the TO-92/LPG Pulse Count to Temperature LUT in the official datasheet.
How does the LMT01LPGM interface with a microcontroller?
The LMT01LPGM interfaces via a 2-pin current-loop pulse count output: VP connects to the system supply (2.0–5.5 V), and VN sinks a pulsed current (34 µA low / 125 µA high) at ~88 kHz. A series load resistor converts this to a voltage swing (e.g., 340 mV–1.25 V with 10 kΩ), readable by any MCU GPIO configured as a digital input or comparator. No ADC, clock, or protocol stack is required - just a counter gated for 104 ms.
What is the conversion time and update rate of the LMT01LPGM?
The LMT01LPGM completes one full temperature conversion and pulse transmission cycle in ≤104 ms: ≤54 ms for internal ADC conversion and ≤50 ms for data transmission. After power-on, the first valid pulse train appears within 104 ms. With continuous power, the device repeats this cycle automatically - yielding a maximum update rate of approximately 9.6 Hz.
Can the LMT01LPGM be used in 2-wire probe configurations up to 2 meters?
Yes - the LMT01LPGM is explicitly designed for 2-wire probe use up to 2 meters. Its current-loop interface provides inherent noise immunity, and its floating 2.0–5.5 V VP–VN supply accommodates voltage drop across long cables. Layout guidelines recommend minimizing stray capacitance (<100 pF) and using twisted-pair wiring; rise/fall times remain within spec when RC time constants stay below ~2.2 µs.
What package type does the LMT01LPGM use, and how does it differ from LMT01DQX?
The LMT01LPGM uses the TO-92/LPG package (3.1 mm × 4 mm × 1.5 mm), a through-hole variant with wettable flanks for optical inspection. It differs from the LMT01DQX, which uses a 2-pin WSON (1.7 mm × 2.5 mm) surface-mount package. Both share identical electrical specs and pulse-count transfer functions, but LMT01LPGM is optimized for cabled probe assemblies, while LMT01DQX targets space-constrained PCB integration.
LMT01LPGM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-226-2, TO-92-2 (TO-226AC)
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -40°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
LMT01LPGM FAQ
1.How can I place an order for LMT01LPGM through Aetrix?
Please submit a Request for Quotation (RFQ) for LMT01LPGM 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 LMT01LPGM reliable?
The price and inventory of LMT01LPGM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMT01LPGM is usually 5 days.
3.What payment methods are accepted for LMT01LPGM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMT01LPGM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMT01LPGM?
LMT01LPGM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMT01LPGM 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 LMT01LPGM?
For technical support, including LMT01LPGM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMT01LPGM requirements.
6.How does Aetrix verify that LMT01LPGM is sourced from the original manufacturer or authorized distributors?
All LMT01LPGM 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 LMT01LPGM meets industry standards.
7.What is the process for return or replacement of LMT01LPGM?
All LMT01LPGM units undergo pre-shipment inspection (PSI). If there is an issue with LMT01LPGM, 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 LMT01LPGM part is unused and in its original packaging.
Return procedure for LMT01LPGM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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