Datasheet SGP30 (Sensirion) - 7

5 Timing Specifications 5.1 Sensor System Timings
The timings refer to the power up and reset of the ASIC part and do not reflect the usefulness of the readings.
Parameter Symbol Condition Min. Typ. Max. Unit Comments
Power-up time tPU After hard reset, VDD ≥VPOR - 0.4 0.6 ms - Soft reset time tSR After soft reset - 0.4 0.6 ms -
Table 6
System timing specifications.
5.2 Communication Timings Parameter Symbol Conditions Min. Typ. Max. Units Comments
SCL clock frequency fSCL - 0 - 400 kHz - Hold time (repeated) START tHD;STA After this period, the 0.6 - - µs - condition first clock pulse is generated LOW period of the SCL clock tLOW - 1.3 - - µs - HIGH period of the SCL clock tHIGH - 0.6 - - µs - Set-up time for a repeated START tSU;STA - 0.6 - - µs - condition SDA hold time tHD;DAT - 0 - - ns - SDA set-up time tSU;DAT - 100 - - ns - SCL/SDA rise time tR - - - 300 ns - SCL/SDA fall time tF - - - 300 ns - SDA valid time tVD;DAT - - - 0.9 µs - Set-up time for STOP condition tSU;STO - 0.6 - - µs - Capacitive load on bus line CB - 400 pF -
Table 7
Communication timing specifications. 1/fSCL tHIGH tLOW tR tF 70%
SCL
30% tSU;DAT tHD;DAT DATA IN 70%
SDA
30% tR tVD;DAT tF DATA OUT 70%
SDA
30%
Figure 10
Timing diagram for digital input/output pads. SDA directions are seen from the sensor. Bold SDA lines are controlled by the sensor; plain SDA lines are controlled by the micro-controller. Note that SDA valid read time is triggered by falling edge of preceding toggle. www.sensirion.com Version 1.0 – May 2020 – D1 7/19 Document Outline 1 Sensor Performance 1.1 Gas Sensing Performance 1.2 Air Quality Signals 1.3 Recommended Operating and Storage Conditions 2 Electrical Specifications 3 Interface Specifications The SGP30 comes in a 6-pin DFN package, see Table 4. 4 Absolute Minimum and Maximum Ratings 5 Timing Specifications 5.1 Sensor System Timings 5.2 Communication Timings 6 Operation and Communication 6.1 Power-Up and Communication Start 6.2 Measurement Communication Sequence 6.3 Measurement Commands 6.4 Soft Reset 6.5 Get Serial ID 6.6 Checksum Calculation 6.7 Communication Data Sequences 7 Quality 7.1 Environmental Stability 7.2 Material Contents 8 Device Package 8.1 Moisture Sensitivity Level 8.2 Traceability 8.3 Package Outline 8.4 Landing Pattern 8.5 Soldering Instructions 9 Tape & Reel Package 10 Ordering Information Revision History Important Notices Warning, Personal Injury ESD Precautions Warranty Headquarters and Subsidiaries