SB040262025 – SGP40-D-R4 AIR QUALITY SENSOR SCHEMATIC BLOCK

This schematic block features the SGP40-D-R4, a digital indoor air quality sensor designed to measure a broad range of volatile organic compounds (VOCs) and provide a composite air quality index via I²C. It integrates a MOX (metal-oxide) sensing element with built-in temperature and humidity compensation, delivering a reliable and stable output suitable for smart-home, HVAC, and environmental monitoring applications.

Packaged as a compact breakout module, this block provides direct access to power, ground, and I²C lines, simplifying prototyping and integration with microcontrollers. Its factory calibration ensures consistent readings without the need for complex external circuitry or frequent recalibration.

The SGP40 family is widely used in indoor air quality monitoring systems due to its low power consumption, fast response, and long-term stability.

Key Features:

• Digital air quality sensor with I²C interface
• Detects a wide range of volatile organic compounds (VOCs)
• Provides a composite air quality index output
• Built-in temperature and humidity compensation
• Supply voltage: 1.8–3.6 V
• Low power consumption: <50 µA in idle mode
• Fast response time: <1 second typical
• Compact module footprint suitable for embedded designs
• Factory calibrated for long-term stability

Typical Applications:

• Indoor air quality (IAQ) monitoring
• Smart HVAC and ventilation systems
• Air purifiers and climate control units
• Environmental monitoring and research applications
• Portable air quality measurement devices
• Smart home and building automation

By integrating this Quickboards schematic block, engineers can rapidly prototype VOC and air-quality monitoring systems, reduce analog front-end complexity, and rely on a fully calibrated, low-power digital sensor ready for immediate integration.