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Texas Instruments LM61CIM3X
- Part No.:
- LM61CIM3X
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM61CIM3X.pdf
- Description:
- SENSOR ANALOG -30C-100C SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,959
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Product details
Overview
LM61CIM3X from Texas Instruments is a precision analog-output temperature sensor in SOT-23-3 package, delivering linear 10 mV/°C output with 600 mV DC offset to enable single-supply operation across –30°C to 100°C. It draws ≤125 µA at 25°C, achieves ±3°C accuracy over –25°C to 85°C, and features 800 Ω max output impedance-ideal for battery-powered thermal monitoring in compact embedded systems.
For engineers reviewing the LM61CIM3X datasheet, LM61CIM3X pinout, LM61CIM3X application, or LM61CIM3X equivalent, key selection criteria include its calibrated slope, offset-enabled negative-temperature capability, low quiescent current, SOT-23 footprint compatibility, and full-range accuracy specification for industrial and consumer thermal sensing.
Technical Context
The LM61CIM3X implements a delta-VBE-based temperature-sensing element buffered by a Class-A output amplifier, producing a strictly linear analog voltage output (VOUT = 10 mV/°C × T + 600 mV). Its architecture requires no external calibration and eliminates need for dual supplies when measuring below 0°C.
Operating from 2.7 V to 10 V, it maintains ±0.8°C nonlinearity and ≤800 Ω output impedance across its full –30°C to 100°C range. Self-heating is limited to ≤0.2°C in still air due to sub-125 µA quiescent current, making it suitable for thermally isolated PCB-mounted or surface-glued deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Range | –30°C to 100°C - supports full industrial ambient and enclosure thermal monitoring without derating. |
| Output Slope | 10 mV/°C - enables direct ADC scaling with 100°C/V resolution and minimal signal conditioning. |
| DC Offset | 600 mV - allows measurement of negative temperatures using only a single positive supply rail. |
| Accuracy (25°C) | ±3°C - factory-calibrated maximum error at room temperature for reliable baseline reference. |
| Supply Voltage | 2.7 V to 10 V - compatible with 3.3 V, 5 V, and higher-voltage systems without regulation overhead. |
| Quiescent Current | ≤125 µA at 25°C - minimizes self-heating (<0.2°C) and extends battery life in portable applications. |
| Output Impedance | ≤800 Ω - drives standard ADC inputs and RC filters without buffer amplification. |
Pinout & Package
SOT-23-3 (DBZ) package: 1.30 mm × 2.92 mm body, gull-wing leads, RoHS-compliant matte tin (SN) finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VS | Power supply input | Accepts 2.7 V–10 V DC; powers internal bandgap and amplifier; must be bypassed with 0.1 µF capacitor to GND. |
| VOUT | Analog temperature output | Linear voltage output (300 mV @ –30°C to 1600 mV @ 100°C); connects directly to ADC or comparator input. |
| GND | Reference ground | Device substrate and thermal reference node; ties to system ground plane for stable thermal coupling and noise rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Calibrated linear scale factor | 10 mV/°C with 600 mV offset - eliminates need for software compensation or external gain/offset circuitry. |
| Full-range accuracy guarantee | ±4°C over –30°C to 100°C - ensures predictable error bounds for safety-critical thermal shutdown logic. |
| Low-power operation | 125 µA max current drain - enables continuous monitoring in energy-constrained IoT nodes and wearables. |
| Single-supply negative-temp support | 600 mV offset enables 0°C = 600 mV, –25°C = 350 mV - avoids cost and complexity of dual-rail supplies or level-shifting. |
| UL recognition | UL Recognized Component (E170771) - satisfies regulatory requirements for end-equipment thermal protection circuits. |
Applications
| Cellular Phone Thermal Management | Industrial Power Supply Monitoring |
|---|---|
|
Use Scenario: Real-time die temperature tracking of RF power amplifiers and baseband processors during high-load transmission bursts. IC Role / Device Role / Timing Role: Analog temperature sensor providing voltage output proportional to junction temperature for dynamic throttling control. Use Value: Enables precise thermal margining within 0.2°C self-heating limit, preventing performance throttling until actual thermal limits are reached. |
Use Scenario: Continuous monitoring of heatsink or transformer winding temperature in AC/DC and DC/DC converters. IC Role / Device Role / Timing Role: Primary thermal feedback element feeding into overtemperature shutdown comparators or digital controller ADC inputs. Use Value: ±3°C accuracy over –25°C to 85°C ensures reliable trip-point detection before insulation degradation or efficiency collapse occurs. |
| Laptop Battery Pack Protection | Smart HVAC Sensor Node |
|
Use Scenario: Embedded inside Li-ion battery packs to detect abnormal charging/discharging thermal events during field use. IC Role / Device Role / Timing Role: Low-power analog sensor interfaced to fuel gauge IC or microcontroller ADC for thermal fault logging. Use Value: 125 µA quiescent current allows always-on monitoring without measurable impact on battery standby life. |
Use Scenario: Wall-mounted wireless thermostat node measuring ambient air temperature in residential HVAC zones. IC Role / Device Role / Timing Role: Primary temperature transducer converting thermal energy into scalable analog voltage for RF transmission. Use Value: 10 mV/°C slope and 600 mV offset simplify firmware scaling and eliminate need for negative supply in coin-cell-powered designs. |
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 |
|---|---|---|---|
| LM61BIM3X/NOPB | Rated for –25°C to 85°C; ±2°C accuracy at 25°C; same SOT-23-3 package and pinout. | Lower-cost option for commercial-grade applications where extended –30°C to 100°C range is not required. | Select LM61BIM3X/NOPB when ambient operating conditions remain above –25°C and tighter 25°C accuracy is prioritized. |
| TS3217-100 | Digital I²C output; ±1.5°C accuracy; 1.8 V–5.5 V supply; different interface and communication protocol. | Requires MCU with I²C peripheral; eliminates ADC channel but adds firmware dependency and timing overhead. | Choose TS3217-100 only when digital interface, higher accuracy, or multi-sensor bus sharing outweighs analog simplicity and passive reliability. |
Compared with LM61BIM3X/NOPB, the LM61CIM3X provides broader temperature coverage and relaxed accuracy tolerance; compared with TS3217-100, it offers direct analog output, lower BOM count, and immunity to digital bus noise-but lacks programmable alerts or remote addressing.
Availability
LM61CIM3X is available at Aetrix Electronics and suitable for industrial power supply modules, battery management systems, and smart HVAC sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM61CIM3X 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 analog temperature sensing in space-constrained consumer and industrial electronics-emphasizing calibration stability, ease of integration, and thermal accuracy without external components.
FAQ
What is the operating temperature range of the LM61CIM3X?
The LM61CIM3X is rated for continuous operation from –30°C to 100°C. Its electrical characteristics-including accuracy, output slope, and nonlinearity-are guaranteed across this full range per TI's SNIS121J datasheet revision. This makes LM61CIM3X suitable for under-hood automotive cabin modules, industrial motor controllers, and outdoor-rated equipment where ambient extremes occur.
How does the 600 mV offset in the LM61CIM3X enable negative-temperature measurement?
The LM61CIM3X outputs VO = (10 mV/°C × T°C) + 600 mV, so at 0°C the output is exactly 600 mV. At –25°C, VO = 350 mV; at –30°C, VO = 300 mV. This fixed offset ensures all outputs remain positive with a 2.7 V supply, eliminating need for negative rails or level-shifting circuitry. The LM61CIM3X thus delivers true centigrade sensing in single-supply systems.
Is the LM61CIM3X pin-compatible with other LM61 variants?
Yes-the LM61CIM3X uses the SOT-23-3 (DBZ) package with identical pinout (+VS, VOUT, GND) as LM61BIM3X/NOPB and LM61CIM3/NOPB. Mechanical and electrical pin compatibility is confirmed in TI's Package Drawing DBZ and Pin Configuration section of SNIS121J. No PCB layout changes are needed when substituting within the same package family.
What is the maximum allowable supply voltage for the LM61CIM3X?
The absolute maximum supply voltage for the LM61CIM3X is 12 V, but the recommended operating range is 2.7 V to 10 V per Section 6.3 of the datasheet. Operation above 10 V risks exceeding safe power dissipation limits and may degrade long-term stability. For robust design, maintain +VS ≤ 10 V and include a 0.1 µF ceramic bypass capacitor between +VS and GND.
Does the LM61CIM3X require external calibration or trimming?
No-the LM61CIM3X is fully factory-calibrated for slope (10 mV/°C) and offset (600 mV), with accuracy specifications guaranteed over temperature without user adjustment. TI's calibration process ensures ±3°C error over –25°C to 85°C and ±4°C over –30°C to 100°C. No external resistors, DACs, or firmware compensation are required to meet datasheet performance.
LM61CIM3X 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:
- 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
LM61CIM3X FAQ
1.How can I place an order for LM61CIM3X through Aetrix?
Please submit a Request for Quotation (RFQ) for LM61CIM3X 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 LM61CIM3X reliable?
The price and inventory of LM61CIM3X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM61CIM3X is usually 5 days.
3.What payment methods are accepted for LM61CIM3X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM61CIM3X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM61CIM3X?
LM61CIM3X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM61CIM3X 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 LM61CIM3X?
For technical support, including LM61CIM3X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM61CIM3X requirements.
6.How does Aetrix verify that LM61CIM3X is sourced from the original manufacturer or authorized distributors?
All LM61CIM3X 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 LM61CIM3X meets industry standards.
7.What is the process for return or replacement of LM61CIM3X?
All LM61CIM3X units undergo pre-shipment inspection (PSI). If there is an issue with LM61CIM3X, 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 LM61CIM3X part is unused and in its original packaging.
Return procedure for LM61CIM3X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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