Specifications
| Type | Description |
|---|---|
| Part Number | LM50 |
| Manufacturer | Texas Instruments |
| Product Type | Analog centigrade temperature sensor |
| Category | Sensors |
| Package / Case | DBZ SOT-23, 3-pin; nominal package size 2.37 mm x 2.92 mm |
| Sensor Gain | 10 mV/°C; output voltage linearly proportional to temperature |
| Output Voltage Offset | 500 mV at 0°C |
| Temperature Measurement Range | -40°C to 125°C for LM50 |
| Temperature Measurement Range | -40°C to 150°C for LM50HV |
| Output Voltage Range | 100 mV to 1.75 V for LM50, -40°C to 125°C |
| Output Voltage Range | 100 mV to 2 V for LM50HV, -40°C to 150°C |
| Operating Supply Range | 4.5 V to 10 V for LM50 |
| Operating Supply Range | 3 V to 36 V for LM50HV |
| Temperature Accuracy | ±2°C max for LM50HV, 20°C to 70°C |
| Temperature Accuracy | ±2.5°C max for LM50HV, -10°C to 125°C |
| Temperature Accuracy | ±3°C max for LM50HV, -20°C to 150°C |
| Temperature Accuracy | ±2°C max for LM50B at 25°C |
| Temperature Accuracy | ±3°C max for LM50B over temperature range |
| Temperature Accuracy | ±3°C max for LM50C at 25°C |
| Temperature Accuracy | ±4°C max for LM50C over temperature range |
| Quiescent Current | 52 µA typ for LM50HV |
| Quiescent Current | 95 µA typ for LM50 |
| Nonlinearity | ±1.2°C max for LM50HV |
| Nonlinearity | ±0.8°C max for LM50 |
| DC Output Impedance | 2 kΩ typ, 4 kΩ max over operating temperature range |
| Supply Voltage Absolute Maximum | -0.2 V to 12 V for LM50 |
| Supply Voltage Absolute Maximum | -0.2 V to 39.6 V for LM50HV |
| Output Voltage Absolute Maximum | -1 V to +VS + 0.6 V for LM50; maximum voltage must not exceed 12 V |
| Output Voltage Absolute Maximum | -0.3 V to +VS + 0.3 V for LM50HV; maximum voltage must not exceed 39.6 V |
| Output Current Absolute Maximum | 10 mA IOUT |
| Maximum Junction Temperature | 150°C TJ |
| Storage Temperature | -65°C to 150°C for LM50 |
| Storage Temperature | -65°C to 175°C for LM50HV |
| HBM ESD Rating | ±2000 V for LM50, per JESD22-A114 |
| HBM ESD Rating | ±2500 V for LM50HV, per JESD22-A114 |
| CDM ESD Rating | ±750 V for LM50, per JESD22-C101 |
| CDM ESD Rating | ±1000 V for LM50HV, per JESD22-C101 |
| Recommended Specified Temperature Range | -25°C to 100°C for LM50B legacy chip |
| Recommended Specified Temperature Range | -40°C to 125°C for LM50B new chip |
| Recommended Specified Temperature Range | -40°C to 125°C for LM50C |
| Recommended Specified Temperature Range | -40°C to 150°C for LM50HV |
| Junction-to-Ambient Thermal Resistance | 291.9°C/W for LM50 DBZ SOT-23 legacy chip, 3 pins |
| Junction-to-Ambient Thermal Resistance | 240.6°C/W for LM50 DBZ SOT-23 new chip or LM50HV DBZ SOT-23, 3 pins |
| Junction-to-Case Top Thermal Resistance | 114.3°C/W for LM50 DBZ SOT-23 legacy chip, 3 pins |
| Junction-to-Case Top Thermal Resistance | 144.5°C/W for LM50 DBZ SOT-23 new chip or LM50HV DBZ SOT-23, 3 pins |
| Junction-to-Board Thermal Resistance | 62.3°C/W for LM50 DBZ SOT-23 legacy chip, 3 pins |
| Junction-to-Board Thermal Resistance | 72.3°C/W for LM50 DBZ SOT-23 new chip or LM50HV DBZ SOT-23, 3 pins |
| Temperature Coefficient | 9.7 mV/°C min, 10 mV/°C typ, 10.3 mV/°C max for LM50, TA = TJ = TMIN to TMAX |
| Turn-On Time | 5 µs for LM50 legacy chip |
| Turn-On Time | 30 µs for LM50 new chip |
| Long-Term Stability and Drift | ±0.08°C for LM50, TJ = 125°C for 1000 hours |
| Operating Current | 95 µA typ, 180 µA max for LM50 legacy chip, TA = TMIN to TMAX, 4.5 V ≤ +VS ≤ 10 V |
| Operating Current | 52 µA typ, 90 µA max for LM50 new chip, TA = TMIN to TMAX, 4.5 V ≤ +VS ≤ 10 V |
| Line Regulation | -1.2 mV/V min, 1.2 mV/V max for LM50, TA = TMIN to TMAX, 4.5 V ≤ +VS ≤ 10 V |
| Change of Quiescent Current | 2 µA for LM50 legacy chip, TA = TMIN to TMAX, 4.5 V ≤ +VS ≤ 10 V |
| Change of Quiescent Current | 8 µA for LM50 new chip, TA = TMIN to TMAX, 4.5 V ≤ +VS ≤ 10 V |
| Quiescent Current Temperature Coefficient | 1 µA/°C for LM50B, TA = TMIN to TMAX, 4.5 V ≤ +VS ≤ 10 V |
| Quiescent Current Temperature Coefficient | 2 µA/°C for LM50C, TA = TMIN to TMAX, 4.5 V ≤ +VS ≤ 10 V |
| Pin 1 Function | +VS positive power supply pin |
| Pin 2 Function | VO temperature sensor analog output |
| Pin 3 Function | GND device ground pin connected to power supply negative terminal |
| Datasheet Status | request_only |
Product Overview
The LM50 is a Texas Instruments analog centigrade temperature sensor. Its output voltage is linearly proportional to temperature, using a 10 mV/°C gain and a 500 mV offset at 0°C. For the LM50 device, the specified temperature measurement range is -40°C to 125°C, with output voltage from 100 mV to 1.75 V across that range.
The device is supplied in a DBZ SOT-23, 3-pin package with a nominal 2.37 mm x 2.92 mm package size. Pin 1 is +VS for the positive supply, pin 2 is VO for the temperature sensor analog output, and pin 3 is GND for the power supply negative terminal.
Key electrical parameters include a 4.5 V to 10 V LM50 operating supply range, 95 µA typical quiescent current, ±0.8°C maximum nonlinearity for LM50, and 2 kΩ typical, 4 kΩ maximum DC output impedance over the operating temperature range. Absolute maximum ratings include a -0.2 V to 12 V LM50 supply voltage range and 10 mA output current maximum.
Key Features
- 10 mV/°C linear temperature sensor output gain
- 500 mV output voltage offset at 0°C
- LM50 measures -40°C to 125°C
- LM50HV measures -40°C to 150°C
- LM50 output range is 100 mV to 1.75 V
- LM50 operates from 4.5 V to 10 V
- LM50 typical quiescent current is 95 µA
- LM50 maximum nonlinearity is ±0.8°C
- DBZ SOT-23 3-pin package
- VO pin provides temperature sensor analog output
Typical Applications
- Centigrade temperature measurement
- Analog temperature voltage output
- SOT-23 temperature sensing layouts
- LM50 supply-referenced sensing
- VO output monitoring circuits
- Temperature sensing over -40°C to 125°C
Procurement Notes
When requesting a quote for LM50, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What type of sensor is the LM50?
The LM50 is an analog centigrade temperature sensor from Texas Instruments. Its output voltage is linearly proportional to temperature with 10 mV/°C gain and a 500 mV offset at 0°C.
What temperature range does the LM50 measure?
For the LM50 device, the extracted datasheet facts specify a temperature measurement range of -40°C to 125°C. The related LM50HV range is listed separately as -40°C to 150°C.
What supply voltage does the LM50 require?
The LM50 operating supply range is 4.5 V to 10 V. The LM50HV variant has a different operating supply range of 3 V to 36 V, according to the extracted datasheet facts.
What package is specified for the LM50?
The package case is DBZ SOT-23 with 3 pins. The extracted package information gives a nominal package size of 2.37 mm x 2.92 mm.
What are the LM50 pin functions?
Pin 1 is +VS for the positive power supply, pin 2 is VO for the temperature sensor analog output, and pin 3 is GND connected to the power supply negative terminal.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 28, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.