# BMI088

**Bosch Sensortec** · Attitude Sensor/Gyroscope · LGA-16(3x4.5)

BMI088 from Bosch Sensortec, in a LGA-16(3x4.5). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | INT2 | bidirectional | Accelerometer interrupt pin #2 (INT2_ACCEL). Digital I/O. If unused, leave unconnected (DNC). |
| 2 | NC | unconnected | No connect. Tied to GND in the reference connection diagrams. |
| 3 | VDD | power_in | Main power supply for analog and digital domains. Operating range 2.4 V to 3.6 V. Decouple with 100 nF to GND. |
| 4 | GNDA | power_in | Ground reference for the analog (VDD) domain. |
| 5 | CSB2 | input | SPI chip select for the gyroscope (active low). In I2C mode this pin is DNC (float). |
| 6 | GNDIO | power_in | Ground reference for the digital I/O (VDDIO) domain. |
| 7 | PS | input | Protocol select for the gyroscope. Tie to GND to select SPI, tie to VDDIO to select I2C. |
| 8 | SCL/SCK | input | Serial clock. Acts as SPI SCK in SPI mode, or I2C SCL in I2C mode. |
| 9 | SDA/SDI | bidirectional | Serial data. I2C: SDA serial data I/O; SPI 4-wire: SDI serial data input; SPI 3-wire: SDA serial data I/O. |
| 10 | SDO2 | output | SPI serial data output for the gyroscope (MISO). In I2C mode this pin is the gyroscope I2C address select (A0_GYRO); tie to GND for default address. |
| 11 | VDDIO | power_in | Digital I/O supply voltage. Operating range 1.2 V to 3.6 V. Decouple with 100 nF to GND. |
| 12 | INT3 | bidirectional | Gyroscope interrupt pin #1 (INT3_GYRO). Digital I/O. If unused, leave unconnected (DNC). |
| 13 | INT4 | bidirectional | Gyroscope interrupt pin #2 (INT4_GYRO). Digital I/O. If unused, leave unconnected (DNC). |
| 14 | CSB1 | input | SPI chip select for the accelerometer (active low). In I2C mode tie to VDDIO or leave DNC (float); the accelerometer defaults to I2C when CSB1 is high at power-up. |
| 15 | SDO1 | output | SPI serial data output for the accelerometer (MISO). In I2C mode this pin is the accelerometer I2C address select (A0_ACCEL); tie to GND for default address. |
| 16 | INT1 | bidirectional | Accelerometer interrupt pin #1 (INT1_ACCEL). Digital I/O. If unused, leave unconnected (DNC). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Bosch Sensortec |
| Package | LGA-16(3x4.5) |
| Category | Sensor |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `BMI088`
- Footprint: `Package_LGA:Bosch_LGA-16_4.5x3mm_P0.5mm_LayoutBorder7x1y_ClockwisePinNumbering`
- 3D model: LGA-16(3x4.5) (KiCad packages3D, STEP)
- 3D model files: `bmi088-etched.step` / `bmi088-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bmi088.step` / `bmi088.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Bosch Sensortec datasheet](docs/bmi088-datasheet.pdf) (62 pp, sha256 `53ab734dba49ac20`, retrieved 2026-08-17, tier: lcsc)
- **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/bmi088-datasheet.pdf)