Specifications
| Type | Description |
|---|---|
| Part Number | TMP61 |
| Manufacturer | Texas Instruments |
| Product Type | Linear PTC thermistor temperature sensor |
| Category | Sensor |
| Package / Case | DEC (X1SON, 2) 1.00 mm x 0.60 mm; LPG (TO-92S, 2) 4.00 mm x 1.52 mm; DYA (SOT-5X3, 2) 1.60 mm x 0.80 mm |
| Sensor Technology | Silicon-based positive temperature coefficient (PTC) thermistor; device description/features |
| Nominal Resistance R25 | 10 kOhm; TA=25°C |
| R25 Tolerance | ±1% max; 0°C to 70°C |
| Operating Temperature Range | -40°C to +150°C; general device feature |
| Temperature Coefficient at 25°C | 6400 ppm/°C; 25°C |
| Typical TCR Tolerance Across Temperature Range | 0.2% typ; across temperature range |
| Fast Thermal Response Time | 0.6 s; DEC package |
| Long-Term Sensor Drift | 0.5% typ; general feature |
| Package Option | X1SON / DEC (0402); TMP61 catalog device, TA=-40°C to 125°C |
| Package Option | SOT-5X3 / DYA (0603); TMP61 catalog device, TA=-40°C to 150°C |
| Package Option | TO-92S / LPG; TMP61 catalog device, TA=-40°C to 150°C |
| Pin 1 Function | Thermistor negative terminal (-); positive bias required; + terminal must be at higher voltage than - terminal |
| Pin 2 Function | Thermistor positive terminal (+); positive bias required; + terminal must be at higher voltage than - terminal |
| Absolute Maximum Voltage Across Device | 6 V max; over operating free-air temperature range |
| Absolute Maximum Junction Temperature | -65°C to 155°C; over operating free-air temperature range |
| Absolute Maximum Current Through Device | 450 µA max; over operating free-air temperature range |
| Storage Temperature | -65°C to 155°C; absolute maximum rating |
| ESD Rating HBM | ±2000 V; human-body model per JESD22-A114 |
| ESD Rating CDM | ±1000 V; charged-device model per JESD22-C101 |
| Recommended Voltage Across Pins | 0 V min, 5.5 V max; VSns across pins 2 (+) and 1 (-) |
| Recommended Current Through Device | 0 µA min, 400 µA max; ISns current passing through the device |
| Recommended Operating Free-Air Temperature | -40°C to 125°C; X1SON / DEC package |
| Recommended Operating Free-Air Temperature | -40°C to 150°C; TO-92S / LPG package |
| Recommended Operating Free-Air Temperature | -40°C to 150°C; SOT-5X3 / DYA package |
| Junction-to-Ambient Thermal Resistance | 443.4°C/W; DEC X1SON, 2 pins; JEDEC-standard High-K board, natural convection |
| Junction-to-Ambient Thermal Resistance | 215°C/W; LPG TO-92S, 2 pins; JEDEC-standard High-K board, natural convection |
| Junction-to-Ambient Thermal Resistance | 742.9°C/W; DYA SOT-5X3, 2 pins; JEDEC-standard High-K board, natural convection |
| Junction-to-Case Top Thermal Resistance | 195.7°C/W; DEC X1SON, 2 pins |
| Junction-to-Case Top Thermal Resistance | 99.9°C/W; LPG TO-92S, 2 pins |
| Junction-to-Case Top Thermal Resistance | 315.8°C/W; DYA SOT-5X3, 2 pins |
| Junction-to-Board Thermal Resistance | 254.6°C/W; DEC X1SON, 2 pins |
| Junction-to-Board Thermal Resistance | 191.7°C/W; LPG TO-92S, 2 pins |
| Junction-to-Board Thermal Resistance | 506.2°C/W; DYA SOT-5X3, 2 pins |
| Junction-to-Top Characterization Parameter | 19.9°C/W; DEC X1SON, 2 pins |
| Junction-to-Top Characterization Parameter | 35.1°C/W; LPG TO-92S, 2 pins |
| Junction-to-Top Characterization Parameter | 109.3°C/W; DYA SOT-5X3, 2 pins |
| Junction-to-Board Characterization Parameter | 254.5°C/W; DEC X1SON, 2 pins |
| Junction-to-Board Characterization Parameter | 191.7°C/W; LPG TO-92S, 2 pins |
| Junction-to-Board Characterization Parameter | 500.4°C/W; DYA SOT-5X3, 2 pins |
| Thermistor Resistance at 25°C | 9.9 kOhm min, 10 kOhm typ, 10.1 kOhm max; TA=25°C, ISns=200 µA |
| Resistance Tolerance at 25°C | -1% min, +1% max; TA=25°C, ISns=200 µA |
| Resistance Tolerance over 0°C to 70°C | -1% min, +1% max; TA=0°C to 70°C, ISns=200 µA |
| Resistance Tolerance over Full Range | -1.5% min, +1.5% max; TA=-40°C to 150°C, ISns=200 µA |
| Temperature Coefficient of Resistance TCR-35 | +6220 ppm/°C; T1=-40°C, T2=-30°C, ISns=200 µA |
| Temperature Coefficient of Resistance TCR25 | +6400 ppm/°C; T1=20°C, T2=30°C, ISns=200 µA |
| Temperature Coefficient of Resistance TCR85 | +5910 ppm/°C; T1=80°C, T2=90°C, ISns=200 µA |
| TCR-35 Tolerance | ±0.4%; T1=-40°C, T2=-30°C, ISns=200 µA |
| TCR25 Tolerance | ±0.2%; T1=20°C, T2=30°C, ISns=200 µA |
| TCR85 Tolerance | ±0.3%; T1=80°C, T2=90°C, ISns=200 µA |
| Sensor Long-Term Drift | -1% min, 0.1% typ, 1% max; 96 hours continuous operation, RH=85%, TA=130°C, VBias=5.5 V |
| Sensor Long-Term Drift | -1% min, 0.5% typ, 1.8% max; 600 hours continuous operation at TA=150°C, VBias=5.5 V, DEC package |
| Sensor Long-Term Drift | -1% min, 0.2% typ, 1.2% max; 600 hours continuous operation at TA=150°C, VBias=5.5 V, DYA package |
| Sensor Long-Term Drift | -1% min, 0.2% typ, 1.2% max; 1000 hours continuous operation at TA=150°C, VBias=5.5 V, DYA package |
| Sensor Long-Term Drift | -0.5% min, 0.5% typ, 1.4% max; 1000 hours continuous operation at TA=150°C, VBias=5.5 V, LPG package |
| Thermal Response Time to 63% | 0.6 s; DEC package, T1=25°C in still air to T2=125°C in stirred liquid |
| Thermal Response Time to 63% | 2.9 s; LPG package, T1=25°C in still air to T2=125°C in stirred liquid |
| Thermal Response Time to 63% | 3.2 s; DEC package, T1=25°C to T2=70°C in still air |
| Thermal Response Time to 63% | 20 s; LPG package, T1=25°C to T2=70°C in still air |
| Datasheet Status | request_only |
Product Overview
The TMP61 is a Texas Instruments linear PTC thermistor temperature sensor using silicon-based positive temperature coefficient technology. It is a two-terminal sensing device with pin 1 defined as the thermistor negative terminal and pin 2 as the thermistor positive terminal. The device requires positive bias, with the positive terminal at a higher voltage than the negative terminal.
At 25°C, TMP61 has a 10 kOhm nominal resistance, specified as 9.9 kOhm minimum, 10 kOhm typical, and 10.1 kOhm maximum at ISns = 200 µA. Resistance tolerance is ±1% at 25°C and over 0°C to 70°C, with ±1.5% over -40°C to 150°C. TCR values include +6220 ppm/°C at TCR-35, +6400 ppm/°C at TCR25, and +5910 ppm/°C at TCR85.
Package options include DEC/X1SON 0402, DYA/SOT-5X3 0603, and LPG/TO-92S. Recommended operation is 0 V to 5.5 V across pins and 0 µA to 400 µA through the device, with package-dependent temperature ranges up to 150°C. Applications center on temperature measurement using a biased thermistor sensor interface.
Key Features
- Silicon-based positive temperature coefficient thermistor technology
- 10 kOhm nominal resistance at 25°C
- ±1% resistance tolerance from 0°C to 70°C
- -40°C to +150°C operating temperature range
- 6400 ppm/°C temperature coefficient at 25°C
- 0.6 s thermal response time in DEC package
- 0 V to 5.5 V recommended sensor voltage
- 0 µA to 400 µA recommended sensor current
- DEC, DYA, and LPG package options
- Positive-bias two-terminal thermistor pinout
Typical Applications
- Temperature sensing circuits
- PTC thermistor sensor interfaces
- Biased resistance measurement
- Free-air temperature monitoring
- Liquid temperature step response testing
- Package-dependent thermal measurement
Procurement Notes
When requesting a quote for TMP61, 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 power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What type of sensor is the TMP61?
TMP61 is a Texas Instruments linear PTC thermistor temperature sensor. The extracted datasheet facts identify its sensing technology as a silicon-based positive temperature coefficient thermistor.
What is the TMP61 resistance at 25°C?
At TA = 25°C and ISns = 200 µA, TMP61 thermistor resistance is specified as 9.9 kOhm minimum, 10 kOhm typical, and 10.1 kOhm maximum.
Which package options are listed for TMP61?
The listed TMP61 package options are X1SON / DEC 0402, SOT-5X3 / DYA 0603, and TO-92S / LPG. The package case data also gives physical dimensions for DEC, LPG, and DYA formats.
What voltage and current are recommended for TMP61 operation?
The recommended voltage across pins 2 positive and 1 negative is 0 V minimum to 5.5 V maximum. Recommended current through the device is 0 µA minimum to 400 µA maximum.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 7, 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.