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Texas Instruments LM61BIZ/LFT3
- Part No.:
- LM61BIZ/LFT3
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM61BIZ/LFT3.pdf
- Description:
- SENSOR ANALOG -25C-85C TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:11,299
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Product details
Overview
LM61BIZ/LFT3 from Texas Instruments is a precision analog-output temperature sensor in TO-92 package, delivering linear 10 mV/°C output with 600 mV DC offset for single-supply operation across –25°C to 85°C. It draws ≤125 µA at 25°C, achieves ±2°C accuracy at room temperature and ±3°C over its full rated range, and is UL recognized for safety-critical thermal monitoring in battery management and power supply modules.
For engineers reviewing the LM61BIZ/LFT3 datasheet, LM61BIZ/LFT3 pinout, LM61BIZ/LFT3 application, or LM61BIZ/LFT3 equivalent, this page delivers verified electrical specs, TO-92 terminal mapping, real-world use cases in remote sensing and low-power systems, and validated alternative options for design continuity.
Technical Context
The LM61BIZ/LFT3 implements a delta-VBE temperature-sensing core buffered by a Class-A output amplifier, producing a strictly linear analog voltage output (VOUT = 10 mV/°C × T + 600 mV) without internal ADC or digital interface. Its 600-mV offset enables negative-temperature measurement down to –25°C using only a 2.7-V to 10-V single supply.
No shutdown control line or digital configuration is present - the device operates continuously in a single functional mode. Thermal self-heating is limited to ≤0.09°C in still air (RθJA = 162.2°C/W), and output impedance remains ≤800 Ω across –25°C to 85°C, ensuring compatibility with standard ADC input stages and RC filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature range | –25°C to 85°C operating range; supports ambient and board-level thermal monitoring without external cold-junction compensation. |
| Output slope | 10 mV/°C ±0.3 mV/°C; enables direct voltage-to-temperature conversion with minimal calibration effort in microcontroller firmware. |
| Accuracy | ±2°C at 25°C, ±3°C over –25°C to 85°C; meets industrial-grade thermal feedback requirements for battery charge control and power supply derating. |
| Supply voltage | 2.7 V to 10 V; compatible with Li-ion battery voltages (3.0–4.2 V), 3.3-V logic rails, and legacy 5-V or 9-V systems. |
| Quiescent current | ≤125 µA at 25°C; allows direct connection to GPIO outputs or low-power logic gates without additional regulation. |
| Output impedance | ≤800 Ω; drives 1 µF capacitive loads with <5 ms time constant, enabling simple noise filtering without op-amp buffering. |
| Nonlinearity | ±0.8°C maximum; ensures monotonic response and simplifies linear interpolation in embedded temperature lookup tables. |
Pinout & Package
LM61BIZ/LFT3 uses the 3-pin TO-92 (LP) package with body size 4.30 mm × 4.30 mm. The device is through-hole mounted and features axial leads compatible with standard PCB hole patterns and wave-soldering processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VS | Power supply input | Accepts 2.7–10 V DC; no reverse-polarity protection; must be bypassed with 0.1 µF capacitor to GND for noise immunity. |
| VOUT | Analog temperature output | Provides ratiometric voltage (350 mV at –25°C, 1450 mV at 85°C); high-impedance source requiring low-capacitance routing or local RC filtering. |
| GND | Reference ground | Die backside thermally bonded to this pin; must connect directly to system ground plane for accurate surface-temperature measurement. |
Key Features
| Feature | Design Value |
|---|---|
| Calibrated linear scale factor | 10 mV/°C with 600 mV offset - eliminates need for dual-supply circuitry when measuring sub-zero temperatures. |
| Low quiescent current | ≤125 µA at 25°C - enables direct sourcing from logic outputs or battery-backed supervisors without loading error. |
| UL recognition | UL Recognized Component (E151272) - satisfies safety certification requirements for end-equipment in consumer and industrial markets. |
| Thermal response stability | Self-heating ≤0.09°C in still air - ensures measurement fidelity in enclosed enclosures or thermally isolated PCB locations. |
| Single-supply operation | Functional from 2.7 V - supports direct integration into energy-harvesting or coin-cell-powered sensor nodes. |
Applications
| Battery Management System | Power Supply Module Monitoring |
|---|---|
Use Scenario: Real-time cell temperature tracking during charging/discharging cycles in portable electronics. IC Role / Device Role / Timing Role: Analog temperature transducer providing continuous voltage output proportional to Li-ion cell surface temperature. Use Value: Enables dynamic charge-rate limiting and thermal cutoff at ±2°C accuracy, preventing overtemperature failure without adding ADC overhead. | Use Scenario: Thermal derating of DC-DC converters and LDOs in telecom and server power supplies. IC Role / Device Role / Timing Role: Primary temperature sensor feeding analog input of supervisory IC or microcontroller ADC. Use Value: Delivers stable 10 mV/°C slope across 2.7–10 V supply range, allowing direct scaling to firmware thresholds without gain/offset calibration. |
| HVAC Zone Sensing | Printer/FAX Thermal Control |
Use Scenario: Ambient air temperature measurement in duct-mounted thermostats and smart HVAC controllers. IC Role / Device Role / Timing Role: Remote temperature probe interfaced via twisted-pair wiring to central controller. Use Value: 600 mV offset permits accurate reading of 0°C–30°C ambient range using 3.3-V MCU ADC with 12-bit resolution. | Use Scenario: Hot-end and fuser roller temperature supervision in laser printers and multifunction FAX devices. IC Role / Device Role / Timing Role: Low-drift analog sensor mounted on thermal mass near heating elements. Use Value: ±0.8°C nonlinearity and ≤800 Ω output impedance ensure repeatable setpoint detection within tight thermal control bands. |
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 |
|---|---|---|---|
| LM61CIZ/NOPB | Wider temperature range (–30°C to 100°C); same TO-92 package, pinout, and 10 mV/°C slope. | Required for applications needing extended low-temperature coverage (e.g., outdoor equipment, freezer monitoring). | Select LM61CIZ/NOPB when –30°C capability is mandatory; otherwise LM61BIZ/LFT3 offers tighter ±2°C accuracy at 25°C. |
| TSIC506-25 | Digital I²C output; 0.5°C typical accuracy; 2.7–5.5 V supply; SOT-23-3 package. | Suitable where microcontroller has I²C interface and firmware can handle digital sensor polling instead of analog sampling. | Choose TSIC506-25 to eliminate ADC channel usage and reduce layout sensitivity; not drop-in due to digital interface and different pin assignment. |
Compared with LM61CIZ/NOPB, LM61BIZ/LFT3 trades –30°C support for improved room-temperature accuracy; compared with TSIC506-25, it retains analog simplicity and eliminates protocol overhead but requires dedicated ADC resources and noise-aware routing.
Availability
LM61BIZ/LFT3 is available at Aetrix Electronics and suitable for battery management, power supply module monitoring, and HVAC zone sensing requiring stable component supply, long-lifecycle support, and RoHS-compliant TO-92 packaging.
Supply support for LM61BIZ/LFT3 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 signal chains and power management ICs.
The LM61 series was designed specifically for cost-sensitive, low-power analog temperature sensing in space-constrained applications where single-supply operation and factory calibration eliminate system-level trimming.
FAQ
What is the operating temperature range of the LM61BIZ/LFT3?
The LM61BIZ/LFT3 is rated for operation from –25°C to 85°C. Its accuracy is specified as ±2°C at 25°C and ±3°C across the full –25°C to 85°C range. This makes LM61BIZ/LFT3 appropriate for indoor industrial, consumer, and computing environments but not for extended cold-weather or high-temperature under-hood automotive use.
Does the LM61BIZ/LFT3 require external calibration?
No, the LM61BIZ/LFT3 is factory-calibrated and requires no external trimming. Its 10 mV/°C slope and 600 mV offset are guaranteed across temperature and supply voltage, enabling direct voltage-to-temperature conversion using VO = (10 mV/°C × T) + 600 mV. LM61BIZ/LFT3 maintains ±0.8°C nonlinearity, supporting linear interpolation in firmware without per-unit calibration.
Can the LM61BIZ/LFT3 be used with a 3.3-V microcontroller ADC?
Yes, the LM61BIZ/LFT3 outputs 350 mV at –25°C and 1450 mV at 85°C, fitting cleanly within a 0–3.3 V ADC input range. With 10 mV/°C resolution and 12-bit ADC (0.8 mV LSB), LM61BIZ/LFT3 supports ~0.08°C effective resolution. Ensure proper power supply decoupling (0.1 µF) and minimize trace length to avoid noise coupling into the VOUT signal.
What is the thermal resistance of the LM61BIZ/LFT3 in TO-92 package?
The LM61BIZ/LFT3 in TO-92 (LP) package has a junction-to-ambient thermal resistance (RθJA) of 162.2°C/W under still-air conditions. This results in ≤0.09°C self-heating at 125 µA quiescent current and 3.3 V supply - negligible for most applications. For higher accuracy, mount LM61BIZ/LFT3's GND pin directly to a copper pour to enhance thermal conduction.
Is the LM61BIZ/LFT3 RoHS compliant and UL recognized?
Yes, LM61BIZ/LFT3 is RoHS compliant (lead finish: SN) and UL Recognized (Component Recognition E151272). These certifications are confirmed in TI's official packaging addendum and apply to all active orderable variants including LM61BIZ/LFT3, LM61BIZ/NOPB, and LM61CIZ/NOPB. No exemptions or waivers are required for standard use.
LM61BIZ/LFT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- 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:
- Through Hole
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- TO-92-3
LM61BIZ/LFT3 FAQ
1.How can I place an order for LM61BIZ/LFT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM61BIZ/LFT3 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 LM61BIZ/LFT3 reliable?
The price and inventory of LM61BIZ/LFT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM61BIZ/LFT3 is usually 5 days.
3.What payment methods are accepted for LM61BIZ/LFT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM61BIZ/LFT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM61BIZ/LFT3?
LM61BIZ/LFT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM61BIZ/LFT3 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 LM61BIZ/LFT3?
For technical support, including LM61BIZ/LFT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM61BIZ/LFT3 requirements.
6.How does Aetrix verify that LM61BIZ/LFT3 is sourced from the original manufacturer or authorized distributors?
All LM61BIZ/LFT3 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 LM61BIZ/LFT3 meets industry standards.
7.What is the process for return or replacement of LM61BIZ/LFT3?
All LM61BIZ/LFT3 units undergo pre-shipment inspection (PSI). If there is an issue with LM61BIZ/LFT3, 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 LM61BIZ/LFT3 part is unused and in its original packaging.
Return procedure for LM61BIZ/LFT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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