Bosch BME688 AI Gas Sensor

Bosch BME688 AI Gas Sensor offers a 1.2V to 3.6V supply voltage range and 3mm x 3mm x 0.93mm package dimensions. This sensor features integrated high linearity and high-accuracy pressure, humidity, and temperature sensors. The BME688 gas sensor can detect Volatile Organic Compounds (VOC) and other gases such as hydrogen and carbon monoxide in the parts per billion (ppb) range. Bosch BME688 AI Gas Sensor is ideal for mobile and connected applications where size and low power consumption are critical requirements.

This sensor contains a gas scanner and consists of 3 parts:

BME688 hardware that is fully backward compatible to the BME680, but with a higher gas resistance range enabled in the ASIC
BSEC Software 2.0
BME Al-Studio enabling users to train the BME688 on special applications

Features

Package dimensions
- 3.0mm x 3.0mm x 0.93mm LGA-8
Operation range (full accuracy)
- Pressure: 300hPa to 1100hPa
- Humidity: 0% to 100%
- Temperature: -40°C to 85°C
Supply voltage
- V_DDIO: 1.2V to 3.6V
- V_DD: 1.71V to 3.6V
Interfaces
- I²C
- SPI
Average current consumption
- 1µA at 1Hz humidity and temperature
- 1µA at 1Hz pressure and temperature
- 7µA at 1Hz humidity, pressure, and temperature
- 90µA at ULP mode for humidity, pressure, temperature, and air quality
- 0.9mA at LP mode for humidity, pressure, temperature, and air quality
- 3.9mA in standard gas scan mode (gas scan mode and scan rate can be optimized on applications with BME AI studio)

Gas sensor
- F1 score for H₂S scanning of 0.92
- Standard scan speed of 10.8s/scan
- Electric charge for standard scan of 0.18mAh (5 scans per 1 min)
- Response time (τ33% to 63%) of <1s
- Sensor-to-sensor deviation of ±15%
- Power consumption of <0.1mA in ULP mode
- Output data processing
  - Index for Air Quality (IAQ)
  - bVOC- and CO₂-equivalents (ppm)
  - Gas scan result (%)
Humidity sensor
- 8s Response time (τ0% to 63%)
- Accuracy tolerance of ±3% relative humidity
- Hysteresis of ≤1.5% relative humidity
Pressure sensor
- RMS Noise of 0.12Pa (equivalent to 1.7cm)
- Sensitivity Error of ±0.25% (equivalent to 1m at 400m height change)
- Temperature coefficient offset of ±1.3Pa/K (equivalent to ±10.9cm at 1°C temperature change)
RoHS compliant, halogen-free, MSL1

Applications

Breath checkers
Connected devices
Smart homes

Wild fire detectors
Fresh food monitors in refrigerators
Diaper odor monitors

Videos

Pin Designations

Mechanical Drawing - Bosch BME688 AI Gas Sensor

Resources

Datasheet
Product Brief

BME688 Software
BME AI Studio User Guide