Specifications
| Type | Description |
|---|---|
| Part Number | LM335 |
| Manufacturer | Texas Instruments |
| Product Type | Precision temperature sensor |
| Category | Sensors |
| Package / Case | TO-92 (LP) 3-pin 4.30 mm x 4.30 mm; SOIC (D) 8-pin 4.90 mm x 3.91 mm |
| Sensor Operating Principle | 2-terminal zener with breakdown voltage proportional to absolute temperature; general device description |
| Output Temperature Scale | 10 mV/K; directly calibrated to Kelvin temperature scale |
| LM335 Continuous Specified Temperature Range | -40 to 100 °C; continuous operation, TMIN <= TA <= TMAX |
| LM335 Intermittent Temperature Range | 100 to 125 °C; intermittent operation |
| Recommended Forward Current | 0.4 mA min, 1 mA nom, 5 mA max; recommended operating conditions |
| Absolute Maximum Reverse Current | 15 mA max; absolute maximum ratings over operating free-air temperature range |
| Absolute Maximum Forward Current | 10 mA max; absolute maximum ratings over operating free-air temperature range |
| Storage Temperature, SOIC Package | -65 to 150 °C; 8-pin SOIC package |
| Storage Temperature, TO/TO-92 Package | -60 to 150 °C; TO/TO-92 package |
| Junction-to-Ambient Thermal Resistance, SOIC | 165 °C/W; LM335/LM335A, SOIC (D), 8 pins |
| Junction-to-Ambient Thermal Resistance, TO-92 | 202 °C/W; LM335/LM335A, TO-92 (LP), 3 pins |
| Operating Output Voltage, LM335 | 2.92 V min, 2.98 V typ, 3.04 V max; TC=25°C, IR=1 mA |
| Operating Output Voltage, LM335A | 2.95 V min, 2.98 V typ, 3.01 V max; TC=25°C, IR=1 mA |
| Uncalibrated Temperature Error at 25°C, LM335 | 2 °C typ, 6 °C max; TC=25°C, IR=1 mA |
| Uncalibrated Temperature Error at 25°C, LM335A | 1 °C typ, 3 °C max; TC=25°C, IR=1 mA |
| Uncalibrated Temperature Error Over Range, LM335 | 4 °C typ, 9 °C max; TMIN <= TC <= TMAX, IR=1 mA |
| Uncalibrated Temperature Error Over Range, LM335A | 2 °C typ, 5 °C max; TMIN <= TC <= TMAX, IR=1 mA |
| Temperature Error with 25°C Calibration, LM335 | 1 °C typ, 2 °C max; TMIN <= TC <= TMAX, IR=1 mA |
| Temperature Error with 25°C Calibration, LM335A | 0.5 °C typ, 1 °C max; TMIN <= TC <= TMAX, IR=1 mA |
| Calibrated Error at Extended Temperature, LM335 | 2 °C max; TC=TMAX intermittent |
| Calibrated Error at Extended Temperature, LM335A | 2 °C max; TC=TMAX intermittent |
| Temperature Non-Linearity, LM335 | 0.3 °C typ, 1.5 °C max; IR=1 mA |
| Temperature Non-Linearity, LM335A | 0.3 °C typ, 1.5 °C max; IR=1 mA |
| Operating Output Voltage Change with Current | 3 mV typ, 14 mV max; LM335/LM335A, 400 µA <= IR <= 5 mA, constant temperature |
| Dynamic Impedance | 0.6 Ω typ; LM335/LM335A, IR=1 mA |
| Output Voltage Temperature Coefficient | 10 mV/°C; LM335/LM335A |
| Thermal Time Constant in Still Air | 80 sec; LM335/LM335A, still air |
| Thermal Time Constant in 100 ft/min Air | 10 sec; LM335/LM335A, 100 ft/min air |
| Thermal Time Constant in Stirred Oil | 1 sec; LM335/LM335A, stirred oil |
| Time Stability | 0.2 °C/khr; LM335/LM335A, TC=125°C |
| Calibration Voltage at 25°C | 2.982 V; calibrated sensor, calibrate for 2.982 V at 25°C |
| SOIC Positive Input Pin | Pin 8; SOIC (D) 8-pin package |
| SOIC Negative Output Pin | Pin 4; SOIC (D) 8-pin package |
| SOIC Calibration Adjust Pin | Pin 5; SOIC (D) 8-pin package |
| SOIC No-Connect Pins | Pins 1, 2, 3, 6, 7; SOIC (D) 8-pin package |
| Datasheet Status | request_only |
Product Overview
The Texas Instruments LM335 is a precision temperature sensor based on a 2-terminal zener structure. Its breakdown voltage is proportional to absolute temperature, and the output is directly calibrated to the Kelvin temperature scale at 10 mV/K. At 25 °C and 1 mA, the LM335 operating output voltage is specified at 2.92 V minimum, 2.98 V typical, and 3.04 V maximum.
Key Features
- 2-terminal zener temperature sensing principle
- Breakdown voltage proportional to absolute temperature
- Direct Kelvin output scale at 10 mV/K
- -40 to 100 °C continuous specified operation
- 100 to 125 °C intermittent temperature operation
- 0.4 mA to 5 mA recommended forward current
- 2.98 V typical output at 25 °C
- 0.6 Ω typical dynamic impedance at 1 mA
- Calibrate to 2.982 V at 25 °C
- SOIC and TO-92 package options
Typical Applications
- Kelvin-scale temperature sensing
- 25 °C calibrated measurement circuits
- Continuous -40 to 100 °C sensing
- Intermittent 100 to 125 °C sensing
- Still-air temperature response measurements
- Forced-air temperature response measurements
- Stirred-oil temperature response measurements
- SOIC sensor assemblies
- TO-92 sensor assemblies
Procurement Notes
When requesting a quote for LM335, 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 operating principle does the LM335 use?
The LM335 uses a 2-terminal zener structure whose breakdown voltage is proportional to absolute temperature. Its output is directly calibrated to the Kelvin temperature scale at 10 mV/K.
What temperature range is specified for LM335 operation?
For continuous operation, the LM335 specified temperature range is -40 to 100 °C. The extracted datasheet facts also list an intermittent operating range from 100 to 125 °C.
What current range is recommended for the LM335?
The recommended forward current is 0.4 mA minimum, 1 mA nominal, and 5 mA maximum. Absolute maximum ratings list 15 mA reverse current and 10 mA forward current.
How is the LM335 calibrated at 25 °C?
For a calibrated sensor, the datasheet facts state that the LM335 should be calibrated for 2.982 V at 25 °C. With 25 °C calibration, LM335 temperature error is 1 °C typical and 2 °C maximum over range.
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.