# LMT86

**Texas Instruments** · Temperature Sensor · SC70-5

The LMT86 is a precision analog temperature sensor with a near-linear negative-slope voltage output (about -10.9 mV/C). It is factory-trimmed for +-0.4 C typical accuracy, draws little current, and needs no external calibration, feeding an MCU ADC directly for thermal monitoring in a tiny SC70-5.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GND | power_in | Power supply ground. Direct connection to the back side of the die; tie to system ground. |
| 2 | GND | power_in | Power supply ground. Direct connection to the back side of the die; tie to system ground (same net as pin 1). |
| 3 | OUT | output | Analog output voltage inversely proportional to temperature (average sensor gain −10.9 mV/°C). Push-pull, ±50 µA drive, short-circuit protected, can drive up to 1100 pF load. |
| 4 | VDD | power_in | Positive supply voltage, 2.2 V to 5.5 V. Bypass with a ceramic capacitor (typ. 0.1 µF) close to the pin. Tied internally to pin 5. |
| 5 | VDD | power_in | Positive supply voltage, 2.2 V to 5.5 V (same net as pin 4). Both VDD pins should be tied together and bypassed. |

## Key specifications

| Parameter | Value |
|---|---|
| Type | Analog (voltage-output) temperature sensor |
| Output slope | -10.9 mV/C (near-linear) |
| Accuracy | +-0.4 C typ |
| Range | -50 C to 150 C |
| Supply voltage | 2.2 V to 5.5 V |
| Supply current | 5.4 uA typ |
| Operating temperature | -50 C to 150 C |

## Ordering variants

Same part, different packaging or reel option.

- `LMT86DCK`
- `LMT86DCK-Q1`
- `LMT86LP`
- `LMT86LPM`
- `LMT86LPG`

## CAD (KiCad official)

- Symbol: `lmt86.kicad_sym`
- Footprint: `lmt86.kicad_mod`
- 3D model: SC70-5 body from KiCad `Package_TO_SOT_SMD/SOT-353_SC-70-5`.
- 3D model files: `lmt86-etched.step` / `lmt86-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lmt86.step` / `lmt86.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/lmt86.pdf) (30 pp, sha256 `541641c8448be4c3`, retrieved 2026-08-17, tier: manufacturer)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/lmt86-datasheet.pdf)