AHT20

Part: AHT20 Type: Temperature and Humidity sensor

Description: A new generation temperature and humidity sensor with digital I²C output, full calibration, excellent long-term stability, and an SMD package suitable for reflow soldering.

Operating Conditions:

• Supply voltage: 2.0–5.5 V
• Operating temperature: 10–50 °C (storage, limited time 0–85 °C)
• Operating humidity: 20–60% RH (storage, no ESD packaged sensor)

Absolute Maximum Ratings:

• Max junction/storage temperature: 260 °C (ultimate welding temperature)

Key Specs:

• I²C device address: 0x38
• Power-on to idle state: 20 ms (max)
• Measurement completion time: 80 ms (after 0xAC command)
• Soft reset time: 20 ms (max)
• ESD HBM: ±4 kV
• ESD MM: ±200 V
• Decoupling capacitor: 100 nF (recommended)

Features:

• Full calibration
• Digital output, I²C interface
• Excellent long-term stability
• SMD package suitable for reflow soldering
• Quick response and strong anti-jamming capability
• Newly designed ASIC chip
• Improved MEMS semiconductor capacitive humidity sensing element
• Standard on-chip temperature sensing element

Applications:

Package:

• Double row flat no-lead package (3 x 3 x 1.0 mm)

The electric specifcations of AHT20 are defned in Table 2. The absolute maximum ratings given in Table 6 are only stress ratings and to provide more information. Under such conditions, it is not advisable for the device to perform functional operation. Exposure to absolute maximum rating or a long time may affect the reliability of the sensor.

ESD electrostatic discharge conforms to JEDEC JESD22-A114 standard (human body mode ±4kV) and JEDEC JESD22-A115 (machine mode±200V) If the test condition exceeds the nominal limit, the sensor needs additional protection circuit.