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Version 7.1 – March 2025

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Datasheet – SHT4x

4th Gen. Relative Humidity and Temperature Sensor

Highlights

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Accuracies ΔRH = ±1.0 %RH, ΔT = ±0.1 °C

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VDD = 1.08 V … 3.6 V

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Avg. current: 0.4 µA, Idle current: 80 nA

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I2C FM+, CRC checksum, multip. I2C addr.

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Patented protection options1, PTFE membrane

and removable protective cover

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Operating range: 0 … 100 %RH, −40…125 °C

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Fully functional in a condensing environment

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Power heater, true NIST-traceability

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JEDEC JESD47 qualification

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Sensor-specific calibration certificate acc. to

ISO 17025: 2017, 3-point temp. calibration

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 (0.4 μW). 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 on-package patented PTFE membrane or a

removable protective cover. Sensor specific calibration certificates according to ISO17025, identifiable

through unique serial numbers, are available.

Device Overview

Functional Block Diagram

Product

Details

SHT40-xD1B

base RH&T accur., possible I2C addr.:

0x44, 0x45, 0x46

SHT40-AD1F

SHT40-AD1B with PTFE membrane

SHT40-AD1P

SHT40-AD1B with protective cover

SHT41-AD1B intermed. RH&T accur., 0x44 I2C addr.

SHT43-ADCB

ISO17025 3-point calibration

certificate

SHT45-AD1B

±1.0 %RH, ±0.1 °C accur.,

0x44 I2C addr.

See full product list on page 21.

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US 10,281,442 ; EP 2871152 ; CN 104627945

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