General Description
SHT4x is a digital sensor platform for measuring relative humidity and temperature at different
accuracy classes. Its I2C interface provides several preconfigured I2C addresses while maintaining
an ultra-low power budget. The power-trimmed internal heater can be used at three heating levels
thus enabling sensor operation in demanding environments. The four-pin dual-flat-no-leads
package is suitable for surface mount technology (SMT) processing and comprises an optional onpackage
patented PTFE [1] membrane or a removable protective cover. Sensor specific calibration
certificates according to ISO17025, identifiable through unique serial number, are available.

Features
• Accuracies ΔRH = ±1.0 %RH, ΔT = ±0.1 °C
• VDD = 1.08 V … 3.6 V
• Avg. current: 0.4 μA, Idle current: 80 nA
• I2C FM+, CRC checksum, multip. I2C addr.
• Patented protection options [1], PTFE
membrane and removable protective cover
• Operating range: 0 … 100 %RH, −40…125 °C
• Fully functional in condensing environment
• Power heater, true NIST-traceability
• JEDEC JESD47 qualification
• Sensor-specific calibration certificate acc. to
ISO 17025 : 2017, 3-point temp. calibration