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Texas Instruments LM61BIM3
- Part No.:
- LM61BIM3
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM61BIM3.pdf
- Description:
- SENSOR ANALOG -30C-100C SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,740
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Product details
Overview
LM61BIM3 from Texas Instruments is a precision analog-output temperature sensor in SOT-23-3 package, delivering a linear 10 mV/°C output with 600 mV DC offset to enable single-supply operation across –25°C to 85°C. It draws ≤125 µA at 25°C, features ±2°C accuracy at room temperature and ±3°C over its full rated range, and is optimized for battery-powered and space-constrained thermal monitoring in power supply modules and portable electronics.
For engineers reviewing the LM61BIM3 datasheet, LM61BIM3 pinout, LM61BIM3 application, or LM61BIM3 equivalent, key selection considerations include its calibrated slope, low quiescent current, offset-enabled negative-temperature capability, and SOT-23 thermal performance under still-air conditions - all critical for embedded thermal feedback loops requiring minimal PCB area and no dual supply.
Technical Context
The LM61BIM3 implements a delta-VBE-based temperature-sensing core buffered by a Class-A output amplifier, producing a ratiometric analog voltage (VOUT = 10 mV/°C × T + 600 mV) referenced to GND. Its architecture eliminates need for external calibration or signal conditioning in basic temperature readout circuits.
Operating from 2.7 V to 10 V, the device maintains ≤800 Ω output impedance and ±0.8°C nonlinearity while limiting self-heating to ≤0.2°C in still air due to sub-125 µA quiescent current - enabling direct mounting on thermally coupled surfaces without significant measurement error from internal dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Range | –25°C to +85°C (rated operating range for LM61B variant) |
| Output Slope | 10 mV/°C (enables direct ADC scaling without gain adjustment) |
| Accuracy at 25°C | ±2°C maximum (supports mid-accuracy thermal monitoring without trimming) |
| Supply Voltage | 2.7 V to 10 V (compatible with Li-ion, 3.3 V, and 5 V rails) |
| Quiescent Current | ≤125 µA at 25°C (minimizes battery drain in always-on sensing) |
| Output Offset | 600 mV (allows reading of negative temperatures with single positive supply) |
| Nonlinearity | ±0.8°C maximum (ensures monotonic response across full range) |
| Output Impedance | ≤800 Ω (drives standard ADC input or RC filter without buffer) |
Pinout & Package
SOT-23-3 (DBZ) package: 1.30 mm × 2.92 mm body, surface-mount, lead-free (Sn), moisture sensitivity level 1 (260°C reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VS | Power Supply Input | Positive supply connection; accepts 2.7 V to 10 V; bypass capacitor recommended |
| VOUT | Analog Output | Linear temperature-proportional voltage (10 mV/°C + 600 mV); drives ADC or comparator directly |
| GND | Ground Reference | Return path for supply and output; die backside thermally bonded to this pin for accurate surface sensing |
Key Features
| Feature | Design Value |
|---|---|
| Calibrated Linear Scale Factor | 10 mV/°C with 600 mV offset enables direct °C-to-voltage conversion without external components |
| Low Power Consumption | ≤125 µA quiescent current limits self-heating to ≤0.2°C in still air, preserving measurement fidelity |
| Single-Supply Operation | 600 mV DC offset allows sensing down to –25°C using only a positive rail - no negative supply required |
| UL Recognition | UL Recognized Component (E151247) supports compliance in end-equipment safety certification |
| Thermal Mounting Flexibility | Direct GND-pin thermal coupling enables accurate surface temperature measurement when glued or soldered to PCB |
Applications
| Power Supply Thermal Monitoring | Battery Pack Temperature Sensing |
|---|---|
Use Scenario: Real-time temperature tracking of DC-DC converter MOSFETs and inductors to prevent thermal runaway during high-load operation. IC Role / Device Role / Timing Role: Analog temperature sensor providing continuous voltage output proportional to local hotspot temperature. Use Value: Enables dynamic current derating or fan control via simple ADC sampling - no digital interface or firmware overhead required. | Use Scenario: Monitoring cell temperature inside sealed lithium-ion battery packs for charge/discharge safety cutoff and state-of-health estimation. IC Role / Device Role / Timing Role: Low-power analog sensor interfaced to battery management system (BMS) microcontroller ADC input. Use Value: Sub-125 µA current draw extends standby time; 600 mV offset ensures reliable –20°C cold-charge detection without auxiliary supply. |
| Embedded System Board Temperature | Consumer Appliance Thermal Protection |
Use Scenario: Measuring PCB temperature near FPGA, SoC, or memory to trigger throttling before junction limits are exceeded. IC Role / Device Role / Timing Role: Surface-mounted thermal monitor placed adjacent to heat-generating ICs on compact system boards. Use Value: SOT-23 footprint minimizes layout area; GND-pin thermal bond ensures <0.2°C error vs. board surface temperature. | Use Scenario: Overtemperature cutoff in smart thermostats, coffee makers, or HVAC control units to prevent component damage or fire hazard. IC Role / Device Role / Timing Role: Safety-critical analog sensor feeding comparator or microcontroller for fast thermal shutdown decisions. Use Value: UL recognition simplifies end-product safety certification; ±2°C accuracy at 25°C supports precise trip-point setting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog-output temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61CIM3X/NOPB | Wider temperature range (–30°C to 100°C); same SOT-23-3 package and pinout | Required for industrial or automotive ambient environments exceeding 85°C | Select LM61CIM3X/NOPB when full –30°C to 100°C coverage is mandatory; otherwise LM61BIM3 suffices for consumer-grade 0–85°C use cases |
| TS3217-1000 | Digital I²C output; ±1°C accuracy; 1.7 V to 3.6 V supply; different pin count and interface protocol | Used where microcontroller has I²C but limited ADC resources or requires multi-sensor daisy-chaining | Choose TS3217-1000 only if digital interface, higher accuracy, or lower voltage operation is prioritized over analog simplicity and ultra-low power |
Compared with LM61CIM3X/NOPB, the LM61BIM3 trades extended temperature range for tighter initial accuracy at 25°C and lower cost in volume production; versus TS3217-1000, it offers analog simplicity and sub-125 µA operation but lacks digital configurability and requires external ADC conversion.
Availability
LM61BIM3 is available at Aetrix Electronics and suitable for power supply modules, battery management systems, and embedded computing platforms requiring stable component supply with long-lifecycle support and consistent parametric performance.
Supply support for LM61BIM3 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 analog sensors, power management, and signal chain solutions.
The LM61 product line was designed for low-cost, high-accuracy analog temperature sensing in space- and power-constrained applications - particularly where single-supply operation and minimal external circuitry are essential design requirements.
FAQ
What is the operating temperature range specified for the LM61BIM3?
The LM61BIM3 is rated for operation from –25°C to +85°C. This range is defined for the LM61B variant specifically and is confirmed in the Electrical Characteristics table and Recommended Operating Conditions section of the TI datasheet SNIS121J. Accuracy degrades to ±3°C across this full span, with ±2°C guaranteed at 25°C.
Does the LM61BIM3 require external calibration or trimming?
No, the LM61BIM3 does not require external calibration or trimming. It is factory-calibrated with a nominal slope of 10 mV/°C and 600 mV offset, achieving ±2°C accuracy at 25°C and ±3°C over –25°C to 85°C without user adjustment. The datasheet confirms this in the Features and Electrical Characteristics sections.
Can the LM61BIM3 measure negative temperatures with a single positive supply?
Yes, the LM61BIM3 can measure negative temperatures with a single positive supply due to its 600 mV DC output offset. At 0°C, VOUT = 600 mV; at –25°C, VOUT ≈ 350 mV - remaining above ground and within valid ADC input range for typical 3.3 V or 5 V systems. This is explicitly stated in the Description and Functional Block Diagram sections.
What is the maximum allowable supply voltage for the LM61BIM3?
The absolute maximum supply voltage for the LM61BIM3 is 12 V, but the recommended operating range is 2.7 V to 10 V per the datasheet's Recommended Operating Conditions table. Operation above 10 V is not advised for long-term reliability, and the device delivers specified performance (e.g., accuracy, current drain) only within the 2.7–10 V range.
How does the LM61BIM3 minimize self-heating error in temperature measurement?
The LM61BIM3 minimizes self-heating error through ultra-low quiescent current (≤125 µA at 25°C), resulting in ≤0.2°C temperature rise in still air as verified in the Thermal Considerations section. Its SOT-23 package and GND-pin thermal bonding further ensure that measured temperature closely tracks the PCB or surface to which it is mounted.
LM61BIM3 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:
- Not For New Designs
- Sensor Type:
- Analog, Local
- Sensing Temperature - Local:
- -30°C ~ 100°C
- Sensing Temperature - Remote:
- -
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 2.7V ~ 10V
- Resolution:
- 10mV/°C
- Features:
- Shutdown Mode
- Accuracy - Highest (Lowest):
- ±2°C (±3°C)
- Test Condition:
- 25°C (-25°C ~ 85°C)
- Operating Temperature:
- -25°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-3
LM61BIM3 FAQ
1.How can I place an order for LM61BIM3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM61BIM3 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 LM61BIM3 reliable?
The price and inventory of LM61BIM3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM61BIM3 is usually 5 days.
3.What payment methods are accepted for LM61BIM3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM61BIM3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM61BIM3?
LM61BIM3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM61BIM3 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 LM61BIM3?
For technical support, including LM61BIM3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM61BIM3 requirements.
6.How does Aetrix verify that LM61BIM3 is sourced from the original manufacturer or authorized distributors?
All LM61BIM3 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 LM61BIM3 meets industry standards.
7.What is the process for return or replacement of LM61BIM3?
All LM61BIM3 units undergo pre-shipment inspection (PSI). If there is an issue with LM61BIM3, 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 LM61BIM3 part is unused and in its original packaging.
Return procedure for LM61BIM3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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