SHTC3

Part: SHTC3 — Sensirion Type: Digital Humidity and Temperature Sensor IC Description: An ultra-low power digital humidity and temperature sensor designed for battery-driven high-volume consumer electronics, offering 0 to 100 %RH and -40 °C to 125 °C measurement ranges with typical accuracies of ±2 %RH and ±0.2 °C, and supporting I2C Fast Mode Plus.

Operating Conditions:

• Supply voltage: 1.62–3.6 V
• Operating temperature: -40 to +125 °C
• Humidity measurement range: 0 to 100 %RH
• Temperature measurement range: -40 to +125 °C

Absolute Maximum Ratings:

• Max supply voltage: +4 V
• Operating temperature range: -40 to +125 °C
• Storage temperature range: -40 to +125 °C

Key Specs:

• Humidity accuracy tolerance (Typ.): ±2.0 %RH
• Humidity repeatability: 0.1 %RH
• Temperature accuracy tolerance (Typ.): ±0.2 °C
• Temperature repeatability: 0.1 °C
• Supply current (Idle state): 45 μA (Typ.)
• Supply current (Sleep Mode): 0.3 μA (Typ.)
• Supply current (Measurement Normal Mode): 430 μA (Typ.)
• Average current consumption (Normal Mode, 1 measurement/s): 4.9 μA (Typ.)
• I2C clock frequency: 0 to 1000 kHz (Fast-mode Plus)
• Measurement duration (Normal Mode): 10.8 ms (Typ.)

Features:

• Ultra-low power consumption
• Full battery supply voltage range (1.62 - 3.6 V)
• Small DFN package: 2 × 2 × 0.75 mm³
• Fully calibrated and reflow solderable
• Power-up and measurement within 1 ms
• NIST traceability
• Digital communication interface supporting I2C Fast Mode Plus

Applications:

• Battery-driven high-volume consumer electronics
• Mobile or wireless applications

Package:

• DFN (2 × 2 × 0.75 mm³)

Default conditions of 25 °C and 3.3 V supply voltage apply to values in the table below, unless otherwise stated.

Table 3 Electrical specifications.

Figure 4 Typical accuracy of relative humidity measurements given in %RH for temperatures 0°C … 80°C.

Stress levels beyond the limits listed in Table 4 may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these conditions cannot be guaranteed. Exposure to the absolute maximum rating conditions for extended periods may affect the reliability of the device. Parameters are only tested each at a time.

Table 4 Absolute maximum ratings.

The sensor performs best when operated within the recommended normal temperature and humidity range of 5 -60 °C and 20 -80 %RH, respectively. Long-term exposure to conditions outside the normal range, especially at high humidity, may temporarily offset the RH signal (e.g. +3%RH after 60h at >80%RH). After returning to normal temperature and humidity range the sensor will slowly come back to its calibration state by itself. Prolonged exposure to extreme conditions may accelerate ageing.

To ensure stable operation of the humidity sensor, please refer to the Handling Instructions SHT. Please note as well that this does apply not only to transportation and manufacturing, but also to operation of the SHTC3.

Figure 9 Package outline drawing of the SHTC3.

Table 18 Package outline dimensions and tolerances.

Figure 9 Package outline drawing of the SHTC3.