My Inquiry
My Account
Texas Instruments LM45BIM3-TI
- Part No.:
- LM45BIM3-TI
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- -
- Datasheet:
-
LM45BIM3-TI.pdf
- Description:
- ANALOG VOLTAGE OUTPUT SENSOR, 35
- Quantity:
- Payment:
- Shipping:
Inventory:20,734
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM45BIM3-TI from Texas Instruments is a precision analog centigrade temperature sensor in SOT-23 package, delivering linear 10.0 mV/°C output voltage with ±3°C accuracy over −20°C to +100°C, 120 μA quiescent current, and 20 Ω low-impedance output - used for battery management, HVAC monitoring, and portable medical instrument thermal sensing.
For engineers reviewing the LM45BIM3-TI datasheet, LM45BIM3-TI pinout, LM45BIM3-TI application, or LM45BIM3-TI equivalent, this page provides verified technical context, real-world design meaning of specifications, validated alternative options, and supply-chain support for industrial embedded and connected-device programs.
Technical Context
The LM45BIM3-TI integrates a calibrated silicon bandgap temperature-sensing element with a low-offset operational amplifier buffer, enabling direct Celsius-to-voltage conversion without external calibration. Its architecture ensures monotonic output across the full operating range and minimal self-heating (0.20°C in still air) due to sub-120 μA supply current.
It operates from a single 4.0 V to 10 V supply, supports remote sensing via its grounded die backside, and maintains ±0.8°C max nonlinearity over temperature. The device is not digitally compensated - all accuracy and linearity are achieved through wafer-level trimming and analog circuit design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Scale Factor | +10.0 mV/°C nominal; enables direct ADC interface with 0.1°C resolution per LSB at 12-bit 3.3 V reference |
| Accuracy | ±3°C over −20°C to +100°C; guaranteed performance without system-level calibration |
| Supply Voltage Range | +4.0 V to +10 V; compatible with common industrial and battery-powered rails including 5 V and 9 V systems |
| Quiescent Current | ≤120 μA at +25°C; allows >1-year operation on a 200 mAh coin cell in periodic-readout applications |
| Thermal Resistance | 260°C/W junction-to-ambient (SOT-23 on 2 oz. copper PCB); limits self-heating error to <0.2°C at 120 μA |
| Output Impedance | 20 Ω at 1 mA load; drives 10 kΩ+ input impedances without gain error or settling delay |
| Nonlinearity | ±0.8°C max over full range; eliminates need for software linearization in cost-sensitive designs |
Pinout & Package
SOT-23 (DBZ0003A) package: 3-pin, 1.12 mm max height, 2.9 mm × 1.3 mm footprint, gull-wing leads, JEDEC TO-236 compliant. Thermal pad not present; heat dissipation relies on PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VS) | Positive Supply Input | Accepts 4.0–10 V DC; internal regulator derives bias for sensor and buffer; no reverse-polarity protection |
| 2 (GND) | Ground Reference & Thermal Path | Die backside bonded directly to this pin; serves as primary thermal conduction path to PCB ground plane |
| 3 (VOUT) | Analog Temperature Output | Low-impedance voltage source (20 Ω); outputs (10 mV/°C × T°C) + offset; requires no pull-up/pull-down |
Key Features
| Feature | Design Value |
|---|---|
| Calibrated in °C at wafer level | Eliminates post-assembly trimming; reduces BOM count and test time in high-volume manufacturing |
| Linear +10.0 mV/°C scale | Enables direct connection to SAR or delta-sigma ADCs without scaling resistors or op-amp gain stages |
| −20°C to +100°C rated range | Validated for use in automotive cabin modules, power supply thermal foldback, and industrial control enclosures |
| Low self-heating (0.20°C) | Maintains measurement fidelity when mounted on thermally isolated PCB traces or small heatsinks |
| Single-supply operation | Supports 5 V microcontroller systems without negative rail generation; simplifies power architecture |
Applications
| Battery Management | HVAC Monitoring |
|---|---|
Use Scenario: Real-time cell temperature tracking in Li-ion battery packs during charge/discharge cycles. IC Role / Device Role / Timing Role: Analog temperature transducer converting die temperature to proportional voltage for MCU ADC sampling. Use Value: Enables thermal cutoff at 60°C with ±3°C margin, preventing overtemperature damage without added signal-conditioning ICs. | Use Scenario: Ambient air temperature sensing in duct-mounted HVAC controllers for PID feedback. IC Role / Device Role / Timing Role: Centigrade sensor providing linear voltage output to HVAC microcontroller's analog input channel. Use Value: Delivers stable 10 mV/°C response across −20°C to +60°C ambient range, supporting 0.5°C setpoint accuracy. |
| Portable Medical Instruments | Power Supply Modules |
Use Scenario: Skin-contact temperature measurement in handheld pulse oximeters and thermometers. IC Role / Device Role / Timing Role: Surface-mounted temperature sensor with GND pin acting as thermal anchor to PCB copper for rapid thermal response. Use Value: Achieves <1.5 s thermal time constant in still air, meeting clinical response requirements while consuming <120 μA. | Use Scenario: Hot-spot monitoring on DC-DC converter MOSFETs and inductors in telecom power supplies. IC Role / Device Role / Timing Role: Remote temperature probe attached to heatsink or component surface via epoxy, feeding analog voltage to supervisory IC. Use Value: Provides accurate thermal derating data with ±3°C tolerance, enabling safe 95% load operation up to 100°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog centigrade temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM35DMX/NOPB | Same 10 mV/°C scale, but ±2°C accuracy at +25°C only; ±4°C over −40°C to +125°C range; TO-92 package | Higher accuracy at room temp but wider full-range error; larger through-hole footprint limits space-constrained PCBs | Select when tighter room-temp accuracy is prioritized and TO-92 mounting is acceptable |
| TSIC506-200 | Digital I²C output, ±0.5°C accuracy, 3.3 V only, integrated 12-bit ADC; SOIC-8 package | Requires I²C host and firmware integration; eliminates analog noise susceptibility but adds protocol overhead | Select when digital interface, higher accuracy, and immunity to analog routing noise are required |
Compared with LM35DMX/NOPB, the LM45BIM3-TI offers better full-range accuracy (±3°C vs ±4°C) and smaller SOT-23 footprint; compared with TSIC506-200, it avoids I²C dependency and supports wider supply voltage (4–10 V), making it preferable for simple analog readout systems.
Availability
LM45BIM3-TI is available at Aetrix Electronics and suitable for battery management, HVAC monitoring, and portable medical instrument designs requiring stable component supply, long-lifecycle support, and RoHS-compliant SOT-23 packaging.
Supply support for LM45BIM3-TI 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 analog sensors and power management ICs.
The LM45 series belongs to TI's precision analog temperature sensor product line, designed specifically for cost-sensitive, low-power applications where direct centigrade voltage output and wafer-trimmed accuracy eliminate calibration complexity.
FAQ
What is the operating temperature range specified for the LM45BIM3-TI?
The LM45BIM3-TI is rated for full operation from −20°C to +100°C, with guaranteed ±3°C accuracy across that entire range. Its extended operating temperature range is −40°C to +125°C, though accuracy degrades outside the rated range - for example, ±4°C at TMIN or TMAX beyond −20°C to +100°C per electrical characteristics table. This makes LM45BIM3-TI suitable for industrial enclosures and automotive cabin environments but not under-hood locations.
Does the LM45BIM3-TI require external calibration or trimming?
No, the LM45BIM3-TI does not require external calibration or trimming. It achieves ±3°C accuracy over −20°C to +100°C through wafer-level trimming during manufacturing, as confirmed in the "Features" and "Description" sections of the SNIS117C datasheet. This eliminates post-assembly calibration steps, reducing production cost and test time in high-volume applications using LM45BIM3-TI.
What is the maximum capacitive load the LM45BIM3-TI can drive directly?
The LM45BIM3-TI can drive up to 500 pF capacitively without special precautions, as stated in the "Capacitive Loads" section of the datasheet. Driving heavier loads may cause instability or overshoot; for such cases, TI recommends adding a series resistor (e.g., 75 Ω) and/or an R-C damper (e.g., 75 Ω + 0.2 μF to ground) as shown in Figure 17 - a design consideration critical when routing LM45BIM3-TI output to long traces or ADC input filters.
How does self-heating affect measurement accuracy of the LM45BIM3-TI?
The LM45BIM3-TI exhibits less than 0.20°C self-heating in still air, due to its ≤120 μA quiescent current and SOT-23 thermal resistance of 260°C/W. This means internal power dissipation (~0.6 mW at 5 V) raises junction temperature by <0.2°C above ambient - a negligible error in most applications. However, in thermally isolated mounts or sealed enclosures with poor airflow, self-heating must be factored into LM45BIM3-TI placement and thermal modeling.
Is the LM45BIM3-TI pin-compatible with other LM45 variants like LM45CIM3?
Yes, the LM45BIM3-TI is pin-compatible with LM45CIM3 and all other LM45 SOT-23 variants (e.g., LM45BIM3X/NOPB), sharing identical DBZ package drawing, 3-pin SOT-23 footprint, and pinout (VS, GND, VOUT). The difference lies solely in accuracy grade: LM45B guarantees ±3°C over −20°C to +100°C, while LM45C guarantees ±4°C over the same range. No PCB changes are needed when substituting LM45BIM3-TI for LM45CIM3 in existing layouts.
LM45BIM3-TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Sensor Type:
- -
- Sensing Temperature - Local:
- -
- Sensing Temperature - Remote:
- -
- Output Type:
- -
- Voltage - Supply:
- -
- Resolution:
- -
- Features:
- -
- Accuracy - Highest (Lowest):
- -
- Test Condition:
- -
- Operating Temperature:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- -
LM45BIM3-TI FAQ
1.How can I place an order for LM45BIM3-TI through Aetrix?
Please submit a Request for Quotation (RFQ) for LM45BIM3-TI 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 LM45BIM3-TI reliable?
The price and inventory of LM45BIM3-TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM45BIM3-TI is usually 5 days.
3.What payment methods are accepted for LM45BIM3-TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM45BIM3-TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM45BIM3-TI?
LM45BIM3-TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM45BIM3-TI 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 LM45BIM3-TI?
For technical support, including LM45BIM3-TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM45BIM3-TI requirements.
6.How does Aetrix verify that LM45BIM3-TI is sourced from the original manufacturer or authorized distributors?
All LM45BIM3-TI 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 LM45BIM3-TI meets industry standards.
7.What is the process for return or replacement of LM45BIM3-TI?
All LM45BIM3-TI units undergo pre-shipment inspection (PSI). If there is an issue with LM45BIM3-TI, 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 LM45BIM3-TI part is unused and in its original packaging.
Return procedure for LM45BIM3-TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM45BIM3-TI Tags
-
MCP9700T-E/TT
Microchip Technology
-
MCP9700T-E/LT
Microchip Technology
-
MCP9701T-E/TT
Microchip Technology
-
MCP9701T-E/LT
Microchip Technology
-
TMP235A4DBZR
Texas Instruments
-
MCP9700AT-E/TT
Microchip Technology
-
MCP9700AT-E/LT
Microchip Technology
-
MCP9701AT-E/LT
Microchip Technology
-
MCP9701AT-E/TT
Microchip Technology
,TO-226_straightlead.jpg)
-
LM335Z
STMicroelectronics
-
TMP1075NDRLR
Texas Instruments
-
TMP1075DGKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
