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Texas Instruments LM61CIM3
- Part No.:
- LM61CIM3
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM61CIM3.pdf
- Description:
- SENSOR ANALOG -30C-100C SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,696
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Product details
Overview
LM61CIM3 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 support –30°C to 100°C sensing on a single 2.7-V supply. It achieves ±3°C accuracy over –25°C to 85°C and ±4°C across its full range, with 125 µA max quiescent current and 800 Ω max output impedance - used for thermal monitoring in battery-powered and space-constrained systems.
For engineers reviewing the LM61CIM3 datasheet, LM61CIM3 pinout, LM61CIM3 application, or LM61CIM3 equivalent, key selection criteria include its calibrated slope, offset-enabled negative-temperature capability, low self-heating (≤0.2°C), SOT-23 footprint compatibility, and specified accuracy over industrial temperature ranges - all critical for embedded thermal management in portable electronics and power modules.
Technical Context
The LM61CIM3 implements a delta-VBE-based temperature-sensing element buffered by a Class-A output amplifier, producing a strictly analog voltage output directly proportional to Celsius temperature. Its transfer function VO = (10 mV/°C × T°C) + 600 mV is factory-calibrated and requires no external compensation components.
Operating from 2.7 V to 10 V, it draws ≤125 µA at 25°C and exhibits ≤0.8°C nonlinearity over –30°C to 100°C. The device has no digital interface, shutdown mode, or programmable features - its functional mode is fixed analog output only, with thermal response governed by package-dependent RθJA (286.3°C/W for SOT-23).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Range | –30°C to 100°C operating range - enables thermal monitoring in extended industrial and automotive cabin environments. |
| Output Slope | 10 mV/°C ±0.4 mV/°C - provides predictable, high-resolution analog scaling for direct ADC interfacing without gain calibration. |
| DC Offset | 600 mV nominal - allows measurement of sub-zero temperatures using only a single positive supply, eliminating need for dual-rail or level-shifting circuitry. |
| Accuracy | ±4°C max over –30°C to 100°C - specifies worst-case error budget for system-level thermal safety margins and fault detection thresholds. |
| Supply Voltage | 2.7 V to 10 V - supports direct connection to Li-ion battery rails (3.0–4.2 V), 3.3-V logic supplies, and legacy 5-V or 9-V systems. |
| Quiescent Current | 125 µA max at 25°C - limits self-heating to ≤0.2°C in still air, preserving measurement fidelity in thermally isolated PCB layouts. |
| Output Impedance | 800 Ω max - ensures stable driving of standard 10-kΩ input impedance ADCs and op-amp buffers without signal degradation. |
Pinout & Package
SOT-23-3 (DBZ) package: 1.30 mm × 2.92 mm body, gull-wing leads, JEDEC-standard footprint compatible with automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VS | Positive power supply input | Accepts 2.7–10 V DC; bypass capacitor required near pin for noise immunity in noisy environments. |
| VOUT | Analog temperature voltage output | Delivers (10 mV/°C × T°C) + 600 mV; drives capacitive loads up to 1 µF without instability. |
| GND | Ground reference | Return path for supply and output; die backside bonded to this pin for optimal thermal conduction to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Calibrated linear scale factor | 10 mV/°C with ±0.4 mV/°C tolerance - eliminates need for system-level slope calibration in cost-sensitive applications. |
| Factory-trimmed offset | 600 mV ±10 mV - enables accurate sub-zero readings without external bias networks or negative supplies. |
| Low-power operation | 125 µA max supply current - permits continuous monitoring in always-on battery systems with multi-year runtime. |
| UL recognition | UL 1577 recognized component - satisfies safety certification requirements for end-equipment without additional isolation design. |
| Thermal response stability | ≤0.2°C self-heating in still air - maintains measurement accuracy when mounted directly on heat-generating ICs or power stages. |
Applications
| Cellular Phone Thermal Management | Power Supply Module Monitoring |
|---|---|
|
Use Scenario: Real-time battery and SoC die temperature tracking during fast charging and high-CPU-load conditions. IC Role / Device Role / Timing Role: Analog temperature sensor providing voltage output to baseband processor's internal ADC for thermal throttling decisions. Use Value: Enables precise thermal guardbanding within ±4°C across –30°C to 100°C, preventing unsafe battery operation while maximizing performance headroom. |
Use Scenario: Monitoring MOSFET junction temperature and heatsink rise in DC-DC converters and AC-DC adapters. IC Role / Device Role / Timing Role: Direct-mount temperature transducer feeding feedback loop to PWM controller or system supervisor IC. Use Value: Supports overtemperature shutdown with <100-ms response time due to low thermal mass and 800-Ω output impedance compatible with standard comparator inputs. |
| Laptop Battery Pack Protection | HVAC Zone Sensor Node |
|
Use Scenario: Embedded in multi-cell Li-ion packs to detect localized hot spots during discharge and charge cycles. IC Role / Device Role / Timing Role: Primary temperature sensing element in fuel gauge IC interface, referenced to pack common ground. Use Value: Delivers stable 600-mV offset output at 0°C, allowing single-supply microcontroller ADCs to resolve –25°C to 85°C with ±3°C accuracy without signal conditioning. |
Use Scenario: Distributed room/duct temperature sensing in smart thermostats and building automation controllers. IC Role / Device Role / Timing Role: Low-power analog sensor node transmitting conditioned voltage to HVAC controller via wired or wireless interface. Use Value: Draws only 125 µA, enabling years of operation on coin-cell batteries; SOT-23 size allows integration into compact PCBs inside plastic sensor housings. |
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 |
|---|---|---|---|
| LM60CIZ | Wider supply range (2.7–10 V), but lower accuracy (±3°C over 0°C–70°C only); 600 mV offset retained; TO-92 package only. | Limited to ambient-only sensing due to narrower rated range; unsuitable for under-hood or battery-core applications requiring –30°C support. | Select when TO-92 mounting or legacy through-hole assembly is required, and full –30°C to 100°C range is not needed. |
| TS331IYDT | Comparator-based output (open-drain), no analog voltage output; 1.6–5.5 V supply; ±1.5°C accuracy at 25°C; SOT-23-5 package. | Provides digital threshold alert only - cannot measure absolute temperature; requires external reference and hysteresis network for thermal trip points. | Choose for simple overtemperature flag generation where analog readback is unnecessary and board space allows 5-pin footprint. |
Compared with LM61CIM3, LM60CIZ trades extended temperature coverage for TO-92 mechanical compatibility, while TS331IYDT replaces analog linearity with digital event detection - making LM61CIM3 uniquely suited for systems needing calibrated, offset-compensated voltage output across –30°C to 100°C in minimal SOT-23 area.
Availability
LM61CIM3 is available at Aetrix Electronics and suitable for cellular phone thermal management, power supply module monitoring, and laptop battery pack protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM61CIM3 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 family was designed specifically for low-cost, single-supply temperature sensing in portable and power-constrained systems - emphasizing factory-calibrated linearity, minimal external components, and robust operation from 2.7 V.
FAQ
What is the operating temperature range of the LM61CIM3?
The LM61CIM3 is rated for continuous operation from –30°C to 100°C. Its accuracy specification is ±4°C maximum across this full range, with tighter ±3°C accuracy guaranteed from –25°C to 85°C and ±2°C or ±3°C at 25°C depending on grade. This makes LM61CIM3 suitable for under-hood automotive, industrial power electronics, and consumer battery applications where wide thermal margins are required.
Does the LM61CIM3 require external calibration or trimming?
No, the LM61CIM3 is fully factory-calibrated for both slope (10 mV/°C) and offset (600 mV), eliminating the need for external calibration. Its electrical characteristics - including ±4°C accuracy over –30°C to 100°C and ±0.8°C nonlinearity - are guaranteed without user adjustment. System-level calibration is optional but not required for meeting datasheet specifications.
Can the LM61CIM3 measure negative temperatures?
Yes, the LM61CIM3 can accurately measure negative temperatures down to –30°C due to its 600 mV DC output offset. At 0°C, the nominal output is 600 mV; at –25°C it drops to ~350 mV and at –30°C to ~300 mV - all within the valid 2.7-V supply range. This allows direct interfacing with single-supply ADCs without level-shifting circuitry.
What is the maximum load capacitance the LM61CIM3 can drive?
The LM61CIM3 can drive up to 1 µF capacitive load without stability issues, forming a 32-Hz low-pass filter with its 5-kΩ maximum output impedance. For larger capacitors, response time increases proportionally, but thermal time constant dominates overall system latency. TI recommends a 0.1-µF bypass capacitor between +VS and GND regardless of load capacitance.
Is the LM61CIM3 RoHS-compliant and lead-free?
The LM61CIM3X/NOPB.B variant is RoHS-compliant and lead-free, with Sn (tin) lead finish and Level-1 moisture sensitivity rating per JEDEC J-STD-020. The base part number LM61CIM3 (without /NOPB suffix) is NRND and not RoHS-compliant; designers should specify LM61CIM3X/NOPB.B for new designs requiring environmental compliance and long-term manufacturability.
LM61CIM3 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):
- ±3°C (±4°C)
- Test Condition:
- 25°C (-30°C ~ 100°C)
- Operating Temperature:
- -30°C ~ 100°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-3
LM61CIM3 FAQ
1.How can I place an order for LM61CIM3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM61CIM3 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 LM61CIM3 reliable?
The price and inventory of LM61CIM3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM61CIM3 is usually 5 days.
3.What payment methods are accepted for LM61CIM3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM61CIM3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM61CIM3?
LM61CIM3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM61CIM3 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 LM61CIM3?
For technical support, including LM61CIM3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM61CIM3 requirements.
6.How does Aetrix verify that LM61CIM3 is sourced from the original manufacturer or authorized distributors?
All LM61CIM3 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 LM61CIM3 meets industry standards.
7.What is the process for return or replacement of LM61CIM3?
All LM61CIM3 units undergo pre-shipment inspection (PSI). If there is an issue with LM61CIM3, 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 LM61CIM3 part is unused and in its original packaging.
Return procedure for LM61CIM3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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