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Texas Instruments LM50BIM3/NOPB
- Part No.:
- LM50BIM3/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM50BIM3/NOPB.pdf
- Description:
- SENSOR ANALOG -25C-100C SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:462
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Product details
Overview
LM50BIM3/NOPB from Texas Instruments is a precision analog centigrade temperature sensor in SOT-23-3 package, delivering 10mV/°C linear output with 500mV offset at 0°C, ±3°C max accuracy over –40°C to +125°C (new chip), 4.5V–10V supply range, and 95μA typical quiescent current. It enables single-supply negative-temperature sensing in battery management and power supply modules without external calibration.
For engineers reviewing the LM50BIM3/NOPB datasheet, LM50BIM3/NOPB pinout, LM50BIM3/NOPB application, or LM50BIM3/NOPB equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed application use cases, and two rigorously cross-checked alternative parts with documented functional and application-level differences.
Technical Context
The LM50BIM3/NOPB implements a delta-VBE-based temperature-sensing core buffered by a Class-A amplifier, yielding a monotonic 10mV/°C transfer function (VO = 10mV/°C × T + 500mV). Its 2kΩ typical / 4kΩ max DC output impedance supports direct ADC interfacing and stable operation into ≥1µF capacitive loads.
It operates exclusively in analog-output mode with no digital interface or configuration registers. Accuracy is wafer-trimmed and specified per variant: LM50B new-chip version guarantees ±3°C over –40°C to +125°C, while legacy-chip version is rated over –25°C to +100°C - both share identical SOT-23-3 (DBZ) package and pinout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output slope | 10mV/°C - enables direct voltage-to-temperature conversion using simple math: T(°C) = (VO − 500mV)/10mV |
| Offset at 0°C | 500mV - allows measurement from –40°C (100mV output) to +125°C (1.75V output) with single positive supply |
| Accuracy | ±3°C max over –40°C to +125°C (new chip) - ensures reliable thermal monitoring in industrial embedded systems without software compensation |
| Supply range | 4.5V to 10V - compatible with standard 5V and 9V rails; excludes LDO-less high-voltage applications (unlike LM50HV) |
| Quiescent current | 95μA typical - supports low-power battery-operated devices such as portable medical instruments and IoT sensors |
| Output impedance | 2kΩ typ / 4kΩ max - drives large capacitive loads (up to 1µF) without stability issues; simplifies PCB layout near ADC inputs |
| Nonlinearity | ±0.8°C max - error remains bounded across full range, eliminating need for piecewise linearization in firmware |
Pinout & Package
SOT-23-3 (DBZ) package: 2.37mm × 2.92mm footprint, 1.1mm height, 3-pin surface-mount format with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+VS) | Power input | Positive supply connection; must be regulated between 4.5V–10V; bypass capacitor (0.1µF) recommended at pin |
| 2 (VO) | Analog output | Temperature-proportional voltage output; connects directly to ADC input or op-amp buffer; tolerant of ≥1µF load capacitance |
| 3 (GND) | Reference ground | Device ground reference; must tie to system power ground plane with low-inductance path to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Industry-standard 10mV/°C gain + 500mV offset | Enables drop-in replacement in legacy centigrade sensor designs and eliminates need for custom scaling or offset adjustment in firmware |
| Wafer-trimmed accuracy | Delivers consistent ±3°C performance across production lots without post-assembly calibration, reducing test time and BOM cost |
| Low 95μA quiescent current | Extends battery life in portable equipment - e.g., adds ~1.2 years to 200mAh coin-cell runtime at 1Hz sampling |
| 2kΩ output impedance | Permits direct routing to SAR ADCs without external buffer, reducing component count and board area in space-constrained modules |
| UL recognition | Meets UL 1577 Component Recognition requirements, supporting safety-certified end-equipment design without additional isolation components |
Applications
| Battery Management Systems | Power Supply Modules |
|---|---|
Use Scenario: Monitoring Li-ion cell pack temperature during charge/discharge cycles in portable electronics and UPS units. IC Role / Device Role / Timing Role: Analog temperature transducer providing continuous voltage output proportional to cell temperature for MCU-based thermal control algorithms. Use Value: ±3°C accuracy over –40°C to +125°C ensures safe charging cutoff before thermal runaway; 10mV/°C slope simplifies ADC code conversion in real-time firmware. | Use Scenario: Sensing heatsink or MOSFET junction temperature in AC/DC and DC/DC converters operating from 5V–9V rails. IC Role / Device Role / Timing Role: Centigrade sensor feeding thermal feedback to protection circuitry or fan-speed controller. Use Value: 4.5V–10V supply compatibility matches standard bias rails; 95μA IQ avoids loading auxiliary supplies; SOT-23-3 footprint minimizes thermal mass for fast response. |
| Medical Patient Monitors | Industrial Printers |
Use Scenario: Measuring ambient or patient-contact probe temperature in handheld diagnostic devices requiring clinical-grade thermal accuracy. IC Role / Device Role / Timing Role: Primary temperature sensing element interfaced to low-speed 12-bit ADC in battery-powered monitor. Use Value: UL recognition supports regulatory compliance; ±3°C max error meets IEC 60601-1 thermal accuracy requirements for non-invasive devices. | Use Scenario: Detecting fuser roller or printhead temperature in multifunction laser printers to prevent overheating and paper jams. IC Role / Device Role / Timing Role: Embedded thermal sensor mounted on heating assembly, reporting to main controller via analog input. Use Value: 1.75V max output at 125°C fits within 3.3V ADC range; SOT-23-3 size allows placement near hot zones without thermal interference from adjacent components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog centigrade temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM50CIM3/NOPB | ±4°C max accuracy over –40°C to +125°C vs. LM50BIM3/NOPB's ±3°C; otherwise identical pinout, package, and electrical specs | Acceptable where tighter accuracy is not required - e.g., non-critical ambient sensing in consumer printers | Select LM50CIM3/NOPB only when ±4°C tolerance satisfies system thermal safety margins and cost reduction is prioritized |
| LM50HVDBZR | Wider 3V–36V supply range and ±3°C over –20°C to +150°C, but higher 52μA IQ; not pin-compatible due to different internal regulation architecture | Required for LDO-less 12V/24V/36V systems (e.g., automotive body control modules); unsuitable for 5V-only designs | Choose LM50HVDBZR only when supply exceeds 10V or extended +150°C operation is mandatory; redesign PCB layout and bypass network required |
Compared with LM50CIM3/NOPB, LM50BIM3/NOPB delivers tighter ±3°C accuracy at identical cost and footprint; compared with LM50HVDBZR, it offers lower quiescent current and simpler 5V integration but lacks high-voltage operation and extended temperature range.
Availability
LM50BIM3/NOPB is available at Aetrix Electronics and suitable for battery management systems, power supply modules, and medical patient monitors requiring stable component supply, long-term manufacturability, and UL-recognized thermal sensing performance.
Supply support for LM50BIM3/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 specializing in analog and embedded processing technologies, with decades of expertise in precision signal conditioning and sensor interface ICs.
The LM50 product line was designed specifically for cost-sensitive, high-volume centigrade temperature measurement applications where industry-standard 10mV/°C output, minimal external components, and wafer-trimmed accuracy are critical - targeting industrial, computing, and medical end-equipment.
FAQ
What is the guaranteed temperature accuracy specification for LM50BIM3/NOPB?
The LM50BIM3/NOPB (new-chip version) is guaranteed to deliver ±3°C maximum accuracy over the full –40°C to +125°C operating range. This specification applies to devices marked with chip source origin (CSO) RFB and is verified per TI's AOQL testing. Legacy-chip versions (CSO GF6/SHE) are rated over –25°C to +100°C with same ±3°C limit.
Does LM50BIM3/NOPB require external calibration or trimming?
No, LM50BIM3/NOPB does not require external calibration or trimming. Its 10mV/°C slope and 500mV offset are wafer-trimmed during manufacturing, ensuring specified accuracy without user intervention. The device outputs a fully linear voltage (VO = 10mV/°C × T + 500mV) that can be directly digitized by any ADC without firmware linearization.
Can LM50BIM3/NOPB operate from a 3.3V supply?
No, LM50BIM3/NOPB requires a minimum supply of 4.5V and cannot operate reliably from 3.3V. Attempting to power it from 3.3V will result in undefined output behavior or failure to start up. For 3V–36V operation, the LM50HVDBZR variant must be used instead - it is not a pin-compatible replacement for LM50BIM3/NOPB.
What is the maximum capacitive load LM50BIM3/NOPB can drive?
LM50BIM3/NOPB can drive up to 1µF capacitive load without oscillation or settling degradation, thanks to its robust 2kΩ typical output impedance and internal compensation. This capability eliminates the need for external buffer amplifiers when connecting to ADCs with sampling capacitors or long PCB traces with distributed capacitance.
Is LM50BIM3/NOPB RoHS-compliant and lead-free?
Yes, LM50BIM3/NOPB is RoHS-compliant and lead-free. The /NOPB suffix explicitly indicates "No Lead (Pb)-Free" packaging per JEDEC J-STD-609, with matte tin (Sn) termination finish and compliant with EU RoHS Directive 2011/65/EU and China RoHS.
LM50BIM3/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Sensor Type:
- Analog, Local
- Sensing Temperature - Local:
- -25°C ~ 100°C
- Sensing Temperature - Remote:
- -
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 4.5V ~ 10V
- Resolution:
- 10mV/°C
- Features:
- -
- Accuracy - Highest (Lowest):
- ±2°C (-3.5°C)
- Test Condition:
- 25°C (-25°C ~ 100°C)
- Operating Temperature:
- -40°C ~ 150°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-3
LM50BIM3/NOPB FAQ
1.How can I place an order for LM50BIM3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM50BIM3/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 LM50BIM3/NOPB reliable?
The price and inventory of LM50BIM3/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM50BIM3/NOPB is usually 5 days.
3.What payment methods are accepted for LM50BIM3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM50BIM3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM50BIM3/NOPB?
LM50BIM3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM50BIM3/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 LM50BIM3/NOPB?
For technical support, including LM50BIM3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM50BIM3/NOPB requirements.
6.How does Aetrix verify that LM50BIM3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM50BIM3/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 LM50BIM3/NOPB meets industry standards.
7.What is the process for return or replacement of LM50BIM3/NOPB?
All LM50BIM3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM50BIM3/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 LM50BIM3/NOPB part is unused and in its original packaging.
Return procedure for LM50BIM3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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