Description
The GW8318 is an advanced 8-channel capacitive sensor designed specifically for SAR (Specific Absorption Rate) applications. Operating at a high-performance level with a voltage input of 1.8V, this intelligent and smart sensor excels in sensing user presence at multiple distances, thereby significantly enhancing SAR functionalities.
The primary purpose of the GW8318 is to detect the presence of users at varying distances, enabling the optimization of Radio Frequency (RF) emission power in the presence of the human body. The GW8318 empowers manufacturers of portable electronic devices with electromagnetic radiation sources to comply with stringent emission regulations and SAR standards, resulting in notable performance advantages.
The GW8318 communicates its data through the I2C serial bus, which is compatible with 1.8V host control. This communication allows for reporting body detection/proximity and facilitates easy adjustment of parameters. When proximity is detected, the NIRQ output is activated, offerin
Typical Applications
- Smartphones
- Tablets
- Laptops
- Hotspots
- Other wireless portable devices
Basic Application Diagram
Features
A single 1.8V supply voltage
400KHz I2C serial interface
Four programmable I2C sub-addresses
Up to 8 capacitive sensing inputs
Separate configurations per sensing input
Multiple sensing thresholds per sensing input
Capacitance resolution: 2.1aF
Capacitance offset compensation: up to 300pF
Flexible Event/Status Handling : Can be automatically paused for event management
Digital sensor status output
Automatic sensor calibration
Advanced temperature compensation
Low power consumption for mobile application:
→ Active mode: 29uA
→ Doze mode: 7uA
→ Sleep mode: 1.2uA
Open drain NIRQ interrupt pin
Two reset sources: POR, Soft Reset
Physical Characteristics
Supply voltage: 1.8V
Operating temperature: -40°C ~ +85°C
Available in a compact 1.8mm x 1.9mm 0.55mm pitch QFN-12 package
Pb & Halogen Free, RoHS/WEEE compliant
Support
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Sample and Buy
Cascode Technologies
T9111, 9F, 66 Chungmin-ro, Songpa-gu, Seoul, 05838, Republic of Korea
Touchworld
919ho, 224, Hwangsaeul-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, 13595, Republic of Korea
Farben
Block B, WeiDa Technology Park, No.15, Gaoxin North 6th road, Songpingshan Community, Xili Street, Nanshan District, Shenzhen, China