ICP-20100 (TDK InvenSense) | High-precision Low-power Barometric Pressure & Temperature Combo MEMS Capacitive Sensor

High-precision low-power barometric pressure & temperature 2-in-1 MEMS capacitive sensor.

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> Part of the TDK SmartPressure™ family. Integrates DSP, ADC and digital filters with 20-bit output. It measures atmospheric pressure to calculate altitude while capturing ambient temperature.

## Key Parameters

- Pressure measurement range: 30kPa ~ 110kPa (300~1100hPa)

- Pressure resolution: 20-bit

- Relative pressure accuracy: ±1 Pa; Absolute pressure accuracy: ±20 Pa

- Pressure noise: as low as 0.5 Pa RMS (high-precision mode)

- Temperature sensor accuracy: ±0.5℃

- Supply voltage VDD: 1.8V / 3.3V; IO voltage VDDIO: 1.2V~3.3V

- Communication interface: I²C (1MHz), SPI (12MHz), I3C (12.5MHz)

- Operating temperature: **-40℃ ~ +85℃** (consumer / industrial grade, non-automotive)

- Package: LGA-10, dimension 2.0 × 2.0 × 0.8 mm, tape-and-reel

- On-chip features: 96-byte FIFO buffer, programmable interrupts, FIR/IIR digital filters, factory calibration

- Power consumption: 1.3μA in low-power mode; 211μA in high-precision mode; standby current 2.65μA

Features

1. Measures atmospheric pressure and converts pressure variation into altitude (cm-level height detection available)

2. Simultaneously samples ambient temperature for pressure-temperature compensation to improve altitude accuracy

3. Digital filtering suppresses disturbances such as wind pressure and sudden pressure fluctuations from door opening

4. FIFO buffer reduces frequent MCU polling of pressure data and eases host controller load

5. Programmable interrupts: pressure threshold trigger, FIFO watermark alert, supports wake-up on altitude change events

6. Can be paired with IMU (6-axis sensor) for sensor fusion, improving positioning and altitude estimation for drones / wearables

 Applications

- Consumer wearables: smart watches, smart bands, floor detection, hiking altitude logging

- Drones: altitude hold, auxiliary height positioning, compensating GPS altitude error

- Mobile terminals: smartphones, indoor floor positioning

- IoT devices: portable weather stations, asset trackers

- Small robots: height detection, terrain fluctuation judgment
- Smart home: barometric pressure monitoring, weather prediction