The TMP235 is a linear analog temperature sensor with a positive slope of 10 mV/°C and 500 mV at 0 °C, working from −40 °C to 150 °C on a 2.3 V to 5.5 V supply. You read it with any ADC pin, so it needs no bus and no library. It is a simple alternative to a thermistor, and to digital parts such as the TMP117. Figures are from the Texas Instruments TMP235 and TMP236 datasheet SBOS857E.
Key specifications
| Output | 10 mV/°C, 500 mV at 0 °C |
|---|---|
| Range | −40 to 150 °C |
| Accuracy | ±2.5 °C max |
| Supply | 2.3–5.5 V |
| Current | 9 µA typical |
| Power-on | 800 µs typical |
What the datasheet promises
| Item | Datasheet value |
|---|---|
| Output | Positive slope 10 mV/°C, 500 mV at 0 °C (typical) |
| Temperature range | −40 to 150 °C |
| Accuracy | ±2.5 °C maximum across the range; ±0.5 °C typical from 0 to 70 °C (A2 grade) or ±1 °C typical (A4 grade) |
| Supply voltage | 2.3 to 5.5 V |
| Quiescent current | 9 µA typical |
| Power-on time | 800 µs typical, which suits power-cycled designs |
| Output drive | Class-AB output, up to 500 µA, for loads up to 1000 pF; short-circuit protected |
| TMP236 | The higher-gain sibling: 19.5 mV/°C, 400 mV at 0 °C, −10 to 125 °C, 3.1 to 5.5 V supply |
| Packages | 5-pin SC70 and 3-pin SOT-23 |
Because the output is a voltage proportional to temperature, the accuracy you get also depends on your ADC reference and on noise on the wire. As a calculation from the figures above, temperature in °C is (output voltage in mV − 500) ÷ 10.
Using it on a robot
- Watch the temperature of a motor driver or battery pack with one ADC pin.
- Power the sensor through a load switch such as the TPS22918 and read it after the 800 µs power-on time to save battery.
- Use a digital part such as the TMP117 where you need finer accuracy.
Sources and further reading
- Texas Instruments TMP235, TMP236 datasheet (SBOS857E) — output slope, range, accuracy, supply, current, drive and packages above.
Last reviewed: November 2026. Limits are from the Texas Instruments datasheet; breakout boards and modules vary. No price is quoted because it has not been checked.
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