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Texas Instruments LMT01QLPGQ1
- Part No.:
- LMT01QLPGQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- TO-226-2, TO-92-2 (TO-226AC)
- Datasheet:
-
LMT01QLPGQ1.pdf
- Description:
- SENSOR DIGITAL -20C-90C TO92-2
- Quantity:
- Payment:
- Shipping:
Inventory:5,505
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Product details
Overview
LMT01QLPGQ1 from Texas Instruments is a high-accuracy, AEC-Q100 Grade 0 qualified 2-pin digital output temperature sensor with pulse count interface, delivering ±0.5°C max accuracy from –20°C to 90°C, 0.0625°C resolution, and continuous 100-ms conversion updates. It operates across 2.0 V to 5.5 V (VP–VN), supports up to 2-m wire length, and interfaces directly with MCU GPIO or comparator inputs in automotive battery management and engine control systems.
For engineers reviewing the LMT01QLPGQ1 datasheet, LMT01QLPGQ1 pinout, LMT01QLPGQ1 application, or LMT01QLPGQ1 equivalent, this page delivers verified technical context, real-world timing behavior, package-specific thermal response, pulse-to-temperature mapping, and selection guidance for noise-immune, low-overhead temperature sensing in safety-critical automotive environments.
Technical Context
The LMT01QLPGQ1 uses an internal thermal diode and sigma-delta ADC with on-chip voltage regulator to convert junction temperature into a proportional pulse count current output. Its 2-pin architecture eliminates ground-referenced signal integrity issues and enables floating operation over VP–VN = 2.0 V to 5.5 V.
Pulse generation follows a deterministic cycle: ≤54 ms power-up/conversion phase at 34 µA, followed by ≤50 ms pulse train (82–94 kHz, 40%–60% duty) encoding temperature as 1–4095 pulses, repeating every ≤104 ms. Accuracy is defined per temperature bin using a validated LUT-not linear interpolation-ensuring ±0.5°C over –20°C to 90°C without system calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy (–20°C to 90°C) | ±0.5°C maximum - guarantees no system calibration needed for HVAC or BMS within this range |
| Resolution | 0.0625°C per pulse - enables precise thermal profiling in ADAS cooling loops |
| Conversion interval | ≤104 ms - ensures real-time thermal monitoring for fast-transient engine control |
| Supply range (VP–VN) | 2.0 V to 5.5 V - supports direct connection to 3.3 V or 5 V MCU rails without level shifters |
| Pulse frequency | 82–94 kHz - allows robust detection using standard GPIO input capture with <1 µs timing margin |
| Output current levels | 34 µA (low), 125 µA (high) - generates 340 mV–1.25 V swing across 10 kΩ pull-up for comparator compatibility |
| Thermal response (stirred oil) | 0.8 s (TO-92/LPG) - matches mechanical thermal time constants in battery cell monitoring probes |
Pinout & Package
Package: TO-92 (LPG), 4.00 mm × 3.15 mm × 1.5 mm body size, 2-pin through-hole, wettable flanks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VP | Positive supply terminal | Accepts 2.0–5.5 V bias; internally regulates chip VDD; must maintain ≥2.15 V during conversion |
| VN | Negative supply / output return | Sinks pulsed current (34/125 µA); forms current loop with VP; connects to system ground or bias resistor |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for –40°C to +150°C operation in automotive powertrain and battery systems |
| EMI-immune 2-pin pulse interface | Eliminates ground loops and common-mode noise susceptibility in high-noise engine bays |
| Integrated voltage regulation | Maintains stable ADC reference and timing despite VP–VN variation from 2.0 V to 5.5 V |
| Wettable flank TO-92 package | Enables automated optical solder-joint inspection for automotive PCB assembly compliance |
| No software ADC dependency | Offloads temperature computation from MCU-no calibration, filtering, or driver code required |
Applications
| Battery Management Systems | Engine Control Units |
|---|---|
Use Scenario: Real-time cell-level temperature monitoring in 48 V mild-hybrid battery packs with >2 m interconnects between cells and controller. IC Role / Device Role / Timing Role: Primary temperature transducer providing pulse-count output directly to MCU GPIO with no analog front-end or isolation. Use Value: Enables accurate thermal runaway detection at ±0.5°C precision while tolerating EMI from adjacent DC-DC converters and motor drivers. |
Use Scenario: Cylinder head temperature sensing in turbocharged gasoline direct injection engines exposed to 150°C ambient and rapid thermal cycling. IC Role / Device Role / Timing Role: High-reliability junction temperature sensor feeding closed-loop ignition timing and fuel enrichment algorithms. Use Value: Delivers certified Grade 0 performance and 0.8 s stirred-oil response-matching thermal dynamics of aluminum cylinder heads. |
| ADAS Camera Modules | HVAC Blower Motor Controllers |
Use Scenario: Compact thermal monitoring inside sealed automotive camera housings where space limits PCB area and airflow is restricted. IC Role / Device Role / Timing Role: Embedded temperature monitor interfacing via single GPIO to SoC, reporting thermal derating status. Use Value: 3.15 mm × 4.00 mm TO-92 footprint fits tight camera lens barrels; pulse output avoids routing sensitive analog signals near high-speed video traces. |
Use Scenario: Temperature feedback for brushless DC blower motor thermal protection in vehicle cabin HVAC systems. IC Role / Device Role / Timing Role: Off-board probe sensor mounted on motor housing, transmitting temperature over twisted-pair wiring to HVAC controller. Use Value: 2-m wire support and 2.0 V minimum operating voltage allow direct integration with 3.3 V controller logic without external regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2-pin digital temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM71Q-Q1 | 12-bit SPI output, 3-pin interface, ±1.5°C accuracy, requires dedicated serial bus and MCU firmware stack | Used where higher data rate or multi-sensor daisy-chaining is needed; not suitable for ultra-low-pin-count designs | Select LM71Q-Q1 only if SPI infrastructure exists and ±1.5°C tolerance is acceptable for the target use case |
| STS4031-DIS | I²C interface, 2.0 V to 5.5 V, ±0.1°C accuracy, 2.5 ms conversion, but requires 3 pins and pull-up resistors | Preferred for high-precision consumer-grade modules where board space permits I²C routing and layout complexity | Choose STS4031-DIS when sub-0.2°C accuracy is mandatory and system already implements I²C with noise-controlled routing |
Compared with LM71Q-Q1 and STS4031-DIS, the LMT01QLPGQ1 uniquely delivers automotive-grade reliability, ±0.5°C accuracy, and true 2-pin simplicity-eliminating bus protocol overhead, reducing BOM count, and enabling direct GPIO counting in resource-constrained MCUs without sacrificing thermal fidelity.
Availability
LMT01QLPGQ1 is available at Aetrix Electronics and suitable for automotive battery management systems, engine control units, ADAS camera thermal monitoring, and HVAC blower motor controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMT01QLPGQ1 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 power management solutions.
The LMT01QLPGQ1 belongs to TI's automotive-qualified temperature sensor product line, designed specifically for robust, low-pin-count thermal sensing in safety-critical vehicle subsystems where reliability, EMI immunity, and minimal software overhead are essential.
FAQ
What is the maximum wire length supported by LMT01QLPGQ1 in a two-wire probe configuration?
LMT01QLPGQ1 supports up to 2 meters of wire length in two-wire temperature probe implementations. This capability is enabled by its current-loop pulse output architecture, which maintains signal integrity against capacitive loading and EMI-verified under automotive-grade noise conditions. The device's 34 µA/125 µA current levels ensure sufficient SNR even with typical 22–26 AWG twisted-pair cabling.
Does LMT01QLPGQ1 require external calibration to achieve ±0.5°C accuracy?
No, LMT01QLPGQ1 achieves ±0.5°C maximum accuracy from –20°C to 90°C without system-level calibration. This specification is guaranteed by TI's factory characterization using the TO-92/LPG Pulse Count to Temperature LUT (Section 6.6), and applies across the full recommended operating range of VP–VN = 2.15 V to 5.0 V. No host MCU compensation or lookup table correction is required.
How does LMT01QLPGQ1 handle electromagnetic interference in automotive environments?
LMT01QLPGQ1 incorporates integrated EMI suppression through its 2-pin current-loop interface, eliminating ground-referenced voltage signaling and common-mode rejection vulnerabilities. Its internal voltage regulator stabilizes ADC operation across supply ripple, and the pulse-count output is inherently immune to induced noise-only pulse count (not edge timing) matters for temperature decoding. AEC-Q100 qualification confirms performance under ISO 11452-4 bulk current injection testing.
What is the thermal response time of LMT01QLPGQ1 in still air?
The LMT01QLPGQ1 in TO-92/LPG package has a still-air thermal response time of 28 seconds to reach 63% of final temperature (τ). This value is measured per JEDEC JESD51-1 with the device mounted on a standard test board and reflects realistic thermal inertia in enclosed automotive enclosures or plastic housings with limited convection.
Can LMT01QLPGQ1 operate below 2.15 V supply voltage?
Yes-LMT01QLPGQ1 maintains functional operation down to 2.0 V VP–VN after initial conversion completes. During the ≤54 ms power-up/conversion phase, however, VP–VN must remain ≥2.15 V to guarantee valid pulse train generation. Below 2.15 V during startup, the device may output incomplete or invalid pulse counts; TI specifies 2.15 V as the minimum for reliable first-read accuracy.
LMT01QLPGQ1 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:
- -20°C ~ 90°C
- Sensing Temperature - Remote:
- -
- Output Type:
- Pulse Count
- Voltage - Supply:
- 2V ~ 5.5V
- Resolution:
- 0.0625°C
- Features:
- -
- Accuracy - Highest (Lowest):
- ±0.5°C (±0.625°C)
- Test Condition:
- -20°C ~ 90°C (-40°C)
- Operating Temperature:
- -40°C ~ 150°C
- Mounting Type:
- Through Hole
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- TO-92-2
LMT01QLPGQ1 FAQ
1.How can I place an order for LMT01QLPGQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMT01QLPGQ1 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 LMT01QLPGQ1 reliable?
The price and inventory of LMT01QLPGQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMT01QLPGQ1 is usually 5 days.
3.What payment methods are accepted for LMT01QLPGQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMT01QLPGQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMT01QLPGQ1?
LMT01QLPGQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMT01QLPGQ1 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 LMT01QLPGQ1?
For technical support, including LMT01QLPGQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMT01QLPGQ1 requirements.
6.How does Aetrix verify that LMT01QLPGQ1 is sourced from the original manufacturer or authorized distributors?
All LMT01QLPGQ1 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 LMT01QLPGQ1 meets industry standards.
7.What is the process for return or replacement of LMT01QLPGQ1?
All LMT01QLPGQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMT01QLPGQ1, 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 LMT01QLPGQ1 part is unused and in its original packaging.
Return procedure for LMT01QLPGQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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