# MT9101A

**Magn Tek** · Linear Hall Sensors · TO-92S

MT9101A from Magn Tek, in a TO-92S. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VCC | power_in | Power supply input, operating range 3.0V to 5.5V (absolute maximum 30V). |
| 2 | GND | power_in | Ground reference pin. |
| 3 | OUT | output | Ratiometric analog output that sits at 1/2 VCC with no magnetic field, with continuous output current limited to ±5mA absolute maximum and load of at least 4.7kOhm to GND or VCC. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Magn Tek |
| Package | TO-92S |
| Category | Magnetic Sensors |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 3 |  | 5.5 | V |  | 5 |
| Supply Voltage | VCC |  |  | 30 | V |  | 4 |
| Reverse Battery Voltage | VRCC | -0.2 |  |  | V |  | 4 |
| Output Voltage | VOUT |  |  | 30 | V |  | 4 |
| Continuous Output Current | IOUT | -5 |  | 5 | mA |  | 4 |
| Operating Ambient Temperature | TA | -40 |  | 150 | ℃ |  | 4 |
| Storage Temperature | TS | -40 |  | 150 | ℃ |  | 4 |
| Junction Temperature | TJ |  |  | 165 | ℃ |  | 4 |
| Supply Current | ICC |  | 6.7 | 8.6 | mA | VCC=5V; B=0 | 5 |
| Supply Current | ICC |  | 6 | 7 | mA | VCC=3.3V; B=0 | 5 |
| Power on Time | TPO |  |  | 30 | us | dVCC/dt≥5V/us | 5 |
| Sink Current | ISINK | -1.5 |  |  | mA | B=0; VOUT=VCC | 5 |
| Source Current | ISOURCE |  |  | 1.5 | mA | B=0; VOUT=0 | 5 |
| Bandwidth | BW | 20 | 30 |  | KHz |  | 5 |
| Noise Density | IND |  | 1.9 | 2.6 | mG/√Hz | Input-referenced noise density; TA=25°C, B=0, CL=1nF | 5 |
| Output Resistance | ROUT |  | 2 | 4 | Ω | IOUT<=±1.5mA; VOUT=2.5V | 5 |
| Output Loading Resistance | RL | 4.7 |  |  | KΩ | IOUT<=1.5mA; Output to GND or to VCC | 5 |
| Output Loading Capacitance | CL |  |  | 10 | nF | IOUT<=±1.5mA; Output to GND | 5 |
| Sensitivity MT9101 | SNST | 1.395 | 1.5 | 1.605 | mV/Gs | TA=25℃; Vcc=5V | 6 |
| Sensitivity MT9101 | SNST | 0.9 | 1 | 1.1 | mV/Gs | TA=25℃; Vcc=3.3V | 6 |
| Magnetic Field Range MT9101 | B | -1466 |  | 1466 | Gs | TA=25℃; Vcc=5V | 6 |
| Magnetic Field Range MT9101 | B | -1350 |  | 1350 | Gs | TA=25℃; Vcc=3.3V | 6 |
| Linearity | LIN | -1.5 |  | 1.5 | % |  | 6 |
| Quiescent Voltage | VOQ | 2.475 | 2.5 | 2.525 | V | VCC=5V; B=0; TA=25℃ | 6 |
| Quiescent Voltage | VOQ | 1.63 | 1.65 | 1.67 | V | VCC=3.3V; B=0; TA=25℃ | 6 |
| Ratiometry, VOQ | VOQ_rat | -1.5 |  | 1.5 | % |  | 6 |
| Ratiometry, SNST | SNST_rat | -2.5 |  | 2.5 | % |  | 6 |
| VOQ Variation Over Temperature | VOQ (T) | -1.5 |  | 1.5 | % |  | 6 |
| Temperature coefficient of Sensitivity | SNST (TC) | -800 | 0 | 800 | ppm/℃ |  | 6 |
| Thermal Resistance, Flat TO-92 | RTH |  | 230 |  | ℃/W |  | 5 |

## CAD (KiCad official)

- Symbol: `MT9101A`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92S (KiCad packages3D, STEP)
- 3D model files: `mt9101a-etched.step` / `mt9101a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mt9101a.step` / `mt9101a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Magn Tek datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758144300435947520) (12 pp, sha256 `a002ba99c385ccb1`, retrieved 2026-10-19, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/mt9101a-datasheet.pdf)