【High-Precision Settingal Monitoring】 14-bit temperature resolution; ±0.3°C accuracy between 0°C and 65°C; 12-bit humidity resolution; ±2% RH accuracy between 20% and 80% RH; Suitable for smart home systems and agricultural monitoring.
【Wide Voltage Compatibility】 Operates on 3.0V to 5.5V DC with built-in 3.3V LDO regulator; compatible with various embedded systems and battery-powered devices; ensures stable performance in diverse applications.
【Low Power Consumption】 330µA working current during measurement; 0.5µA sleep mode current; supports energy-efficient designs for portable and long-term monitoring solutions.
【Reliable I²C Interface】 Fixed I²C address at 0x40; requires external 4.7kΩ pull-up resistors on SCL and SDA; offers stable communication and reduces signal interference in complex Settings.
【Easy Integration and Calibration】 No external circuits required; supports soft reset for calibration; designed for quick setup in automation, weather stations, and industrial control systems.

Key Parameters:

Input Voltage: 3.0V–5.5V DC (wide voltage compatibility, built-in 3.3V LDO regulator)

Chip Operating Voltage: 2.1V–3.6V DC

Temperature Range: -40℃ to +125℃ (±0.3℃ accuracy @ 0–65℃, 14-bit ADC, 0.01℃ resolution)

Humidity Range: 0%–100% RH (±2% RH accuracy @ 20–80% RH, 12-bit ADC, 0.04% resolution)

Communication Protocol: I²C interface (fixed address 0x40)

Response Time: Humidity 8s (τ63%), temperature 2s (τ63%)

Power Consumption:

330μA (active measurement)

0.5μA (sleep mode)

Package: DFN-4 metal shell (3.0mm × 3.0mm × 1.1mm, EMI shielded)

Pin Functions:

VIN: DC power input (3.0V–5.5V), connect to positive supply with 100nF decoupling capacitor.

GND: Power ground.

SCL: I²C clock line (require external 4.7kΩ pull-up resistor to VIN).

SDA: I²C data line (bidirectional, external 4.7kΩ pull-up resistor to VIN).

FAQ:

1.
I²C communication failure?

Confirm device address 0x40 (shifted left: 0x80 for write).

Ensure external 4.7kΩ pull-up resistors on SCL/SDA.

2.
Humidity reading consistently high (>90% RH)?

Avoid condensing Settings (e.g., AC outlets).

Send soft reset command 0xFE to reinitialize.

3.
Compatibility with 3.3V systems?

Yes! Built-in LDO regulates input (3.0V–5.5V) to 3.3V for the sensor.

4.
How to minimize power consumption?

Use single-measurement mode (e.g., send 0xF3 for temperature, sleep after measurement).

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