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Texas Instruments LM61BIM3/NOPB
- Part No.:
- LM61BIM3/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM61BIM3/NOPB.pdf
- Description:
- SENSOR ANALOG -30C-100C SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:25,504
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Product details
Overview
LM61BIM3/NOPB from Texas Instruments is a precision analog-output temperature sensor in SOT-23-3 package, delivering 10 mV/°C linear output with 600 mV DC offset to enable single-supply operation across –25°C to 85°C. It draws ≤125 µA at 25°C, achieves ±2°C accuracy at room temperature, and features 800 Ω max output impedance-ideal for battery-powered thermal monitoring in compact embedded systems.
For engineers reviewing the LM61BIM3/NOPB datasheet, LM61BIM3/NOPB pinout, LM61BIM3/NOPB application, or LM61BIM3/NOPB equivalent, key selection criteria include its calibrated slope, low quiescent current, offset-enabled negative-temperature capability, and SOT-23 thermal performance under constrained PCB layouts.
Technical Context
The LM61BIM3/NOPB implements a delta-VBE-based sensing element buffered by a Class-A output amplifier, producing a strictly analog voltage output directly proportional to die temperature. Its transfer function VO = (10 mV/°C × T°C) + 600 mV is factory-trimmed and stable over 2.7 V–10 V supply range.
No digital interface, configuration registers, or shutdown control exist-the device operates continuously in a single functional mode. Thermal self-heating is limited to ≤0.2°C in still air due to sub-125 µA quiescent current, and output impedance remains ≤800 Ω across full operating temperature and supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Range | –25°C to +85°C operating range; supports industrial ambient monitoring without external cold-junction compensation. |
| Output Slope | 10 mV/°C ±0.3 mV/°C; enables direct ADC scaling with minimal gain error across full range. |
| Accuracy | ±2°C at 25°C; ensures reliable thermal threshold detection in consumer and computing applications. |
| Supply Voltage | 2.7 V to 10 V; compatible with single-cell Li-ion, 3.3 V logic rails, and legacy 5 V systems. |
| Quiescent Current | ≤125 µA at 25°C; permits direct connection to microcontroller GPIO pins for power gating. |
| Output Impedance | ≤800 Ω; drives standard 10 kΩ ADC input loads with <0.1% gain error without buffering. |
| Nonlinearity | ±0.8°C max; simplifies calibration by reducing need for higher-order polynomial correction. |
Pinout & Package
SOT-23-3 (DBZ) package: 1.30 mm × 2.92 mm body, 0.95 mm height, JEDEC-compliant footprint with gull-wing leads. Designed for reflow soldering per Level-1-260°C MSL rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VS (Pin 1) | Positive power supply | Accepts 2.7 V–10 V DC; must be bypassed with 0.1 µF capacitor to GND for noise immunity. |
| VOUT (Pin 2) | Analog temperature output | Provides ratiometric voltage: 350 mV at –25°C, 850 mV at 25°C, 1450 mV at 85°C; connects directly to ADC input. |
| GND (Pin 3) | Reference ground | Die backside thermally bonded to this pin; mounting surface temperature couples within 0.2°C of sensed value. |
Key Features
| Feature | Design Value |
|---|---|
| 600 mV output offset | Enables measurement of negative temperatures down to –25°C using only a single positive supply-no dual-rail op-amps or level-shifting required. |
| UL recognition | Meets UL 1434 Component Recognition Standard, supporting safety-certified designs in end equipment without additional isolation. |
| Low self-heating | ≤0.2°C temperature rise in still air ensures measurement fidelity when mounted on thermally isolated PCB traces or small heatsinks. |
| Delta-VBE architecture | Delivers inherent linearity and long-term stability (±0.2°C drift after 1000 hrs at 100°C), reducing recalibration frequency in field-deployed systems. |
| Capacitive load tolerance | Stable with ≥1 µF output capacitance; allows simple RC filtering (e.g., 1 µF + 5 kΩ = 32 Hz LPF) without oscillation or phase shift. |
Applications
| Cellular Phone Thermal Management | Industrial Power Supply Monitoring |
|---|---|
Use Scenario: Real-time battery and SoC die temperature tracking during fast charging cycles to prevent thermal runaway. IC Role / Device Role / Timing Role: Analog temperature sensor providing continuous voltage output to MCU's internal ADC for closed-loop thermal throttling. Use Value: 10 mV/°C slope and 600 mV offset allow direct 12-bit ADC interpretation without software gain/offset compensation. | Use Scenario: Monitoring heatsink and MOSFET junction temperature in AC/DC and DC/DC converters to trigger fan control or derating. IC Role / Device Role / Timing Role: Remote temperature probe mounted on power stage PCB copper pour, referenced to local GND plane. Use Value: ≤125 µA supply current minimizes added load on auxiliary bias rails while maintaining ±2°C accuracy at critical 25°C–85°C operating zone. |
| Laptop CPU Thermal Throttling | Smart Home HVAC Sensor Node |
Use Scenario: Ambient and processor proximity sensing in ultra-thin clamshell designs where space limits thermal mass. IC Role / Device Role / Timing Role: Surface-mounted SOT-23 sensor on motherboard near CPU VRM, reporting via shared ADC channel. Use Value: SOT-23 footprint and 0.2°C self-heating ensure response reflects true board temperature-not internal die heating artifact. | Use Scenario: Low-power wireless thermostat node measuring room air temperature with 10-year battery life target. IC Role / Device Role / Timing Role: Primary temperature transducer interfaced to sub-GHz RF SoC ADC, powered intermittently during wake cycles. Use Value: 2.7 V minimum supply and sub-125 µA current enable operation directly from coin-cell or energy-harvesting sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog-output temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61CIM3X/NOPB | Wider –30°C to +100°C range; ±3°C accuracy at 25°C; same SOT-23-3 package and pinout. | Required for automotive cabin or outdoor industrial enclosures where extended low-temp operation is mandatory. | Select LM61CIM3X/NOPB when full –30°C specification compliance is needed; otherwise LM61BIM3/NOPB offers tighter ±2°C accuracy at 25°C. |
| TS3217-25IYDT | ±1.5°C accuracy at 25°C; 10 mV/°C slope; 1.8 V–5.5 V supply; SOT-23-3; no UL recognition. | Preferred for cost-sensitive, high-volume consumer electronics where UL certification is not required. | Choose TS3217-25IYDT for lower-cost, higher-accuracy alternatives in non-safety-critical applications; verify thermal layout compatibility. |
Compared with LM61CIM3X/NOPB, the LM61BIM3/NOPB trades extended temperature range for improved ±2°C accuracy at 25°C-making it optimal for computing and telecom thermal guardbanding. Against TS3217-25IYDT, it provides UL recognition and wider supply range but slightly relaxed accuracy spec.
Availability
LM61BIM3/NOPB is available at Aetrix Electronics and suitable for cellular phone thermal management, industrial power supply monitoring, and laptop CPU thermal throttling requiring stable component supply through extended production lifecycles.
Supply support for LM61BIM3/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, embedded processing, and connectivity technologies, with decades of expertise in precision sensing and power management ICs.
The LM61 series was designed specifically for low-power, single-supply temperature measurement in space-constrained portable and industrial systems-emphasizing ease of integration, factory calibration, and robust thermal coupling.
FAQ
What is the operating temperature range of the LM61BIM3/NOPB?
The LM61BIM3/NOPB is rated for operation from –25°C to +85°C. This range is specified in the official Texas Instruments datasheet (SNIS121J, November 2016 revision) and validated across all electrical characteristics including accuracy, output slope, and quiescent current. The LM61BIM3/NOPB variant does not support the –30°C lower limit found in the LM61C grade.
Does the LM61BIM3/NOPB require external calibration?
No, the LM61BIM3/NOPB is factory-calibrated and requires no external calibration for standard use. Its 10 mV/°C slope and 600 mV offset are trimmed during production, enabling direct voltage-to-temperature conversion using VO = (10 mV/°C × T°C) + 600 mV. System-level calibration may still be applied for enhanced accuracy, but the LM61BIM3/NOPB delivers ±2°C accuracy at 25°C out-of-the-box.
Can the LM61BIM3/NOPB be powered directly from a microcontroller GPIO pin?
Yes, the LM61BIM3/NOPB can be powered directly from a microcontroller GPIO pin due to its ≤125 µA quiescent current at 25°C and 2.7 V minimum supply requirement. Many 3.3 V GPIOs can safely source this current; however, ensure the GPIO's absolute maximum output current rating exceeds 130 µA and that firmware disables the pin during sleep to avoid leakage paths. The LM61BIM3/NOPB inherently supports this low-power "always-on" topology.
What is the meaning of the "NOPB" suffix in LM61BIM3/NOPB?
The "NOPB" suffix in LM61BIM3/NOPB indicates lead-free (Pb-free) finish with NiPdAu plating, compliant with RoHS Directive 2011/65/EU. It replaces legacy leaded versions and is fully compatible with standard SnPb and lead-free reflow profiles. Per TI's packaging documentation, LM61BIM3/NOPB uses SN (tin) lead finish and carries Level-1 MSL rating for unlimited floor life at ≤30°C/60% RH.
How does the LM61BIM3/NOPB handle capacitive loads on its VOUT pin?
The LM61BIM3/NOPB is designed to drive capacitive loads up to at least 1 µF without instability. Its output stage maintains phase margin across temperature and supply variations, allowing direct addition of RC filters (e.g., 1 µF + 5 kΩ) for noise reduction. TI application notes confirm stable operation with such loads, and the 800 Ω max output impedance ensures predictable time constants-critical for accurate thermal response in noisy environments.
LM61BIM3/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:
- -30°C ~ 100°C
- Sensing Temperature - Remote:
- -
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 2.7V ~ 10V
- Resolution:
- 10mV/°C
- Features:
- Output Switch
- 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/NOPB FAQ
1.How can I place an order for LM61BIM3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM61BIM3/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 LM61BIM3/NOPB reliable?
The price and inventory of LM61BIM3/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM61BIM3/NOPB is usually 5 days.
3.What payment methods are accepted for LM61BIM3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM61BIM3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM61BIM3/NOPB?
LM61BIM3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM61BIM3/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 LM61BIM3/NOPB?
For technical support, including LM61BIM3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM61BIM3/NOPB requirements.
6.How does Aetrix verify that LM61BIM3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM61BIM3/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 LM61BIM3/NOPB meets industry standards.
7.What is the process for return or replacement of LM61BIM3/NOPB?
All LM61BIM3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM61BIM3/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 LM61BIM3/NOPB part is unused and in its original packaging.
Return procedure for LM61BIM3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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