ROHM BU21050FS User Guide
Summary
The BU21050FS is an advanced 8-channel capacitive sensor controller IC designed for robust switching applications. This integrated circuit features a port output interface, GPIO outputs, and an integrated 10-bit AD converter to monitor multiple sensors simultaneously. The manual provides comprehensive technical details, covering voltage requirements, operational ranges, electrical characteristics, and the detailed architecture of the conversion circuits. It is ideal for engineers developing household electric appliances, industrial devices, and commercial electronics requiring precise, reliable switching capabilities.
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Capacitive Sensor Control IC Series
Capacitive Sensor Switch Control IC BU21050FS ●Description BU21050FS are the capacitive sensor controller with 8ch respectively. The IC has the port interface and easy to replace the point of switch to this controller. ●Features 1) Port output interface 2) Few software control 3) 4bit Binary outputs or 8GPIO outputs 4) 5V power supply voltage available 5) Integrated 10bit AD converter, clock and reset 6) Package SSOP-A32 ●Applications It is possible to use it widely as a switch such as home electric appliance. ●Absolute Maximum Ratings (Ta=25℃)
RATING
PARAMETER SYMBOL UNIT
MIN MAX
AVDD -0.3 7.0
Applied voltage
DVDD -0.3 7.0
VAIN -0.3 AVDD + 0.3
Input voltage
VDIN -0.3 DVDD + 0.3
Storage temperature range Tstg -55 125 ℃
Power dissipation Pd 760 m W
Ambient temperature reduces a permission loss by 7.6m W per case more than 25 degrees Celsius, 1 degree Celsius
Jan. 2009
Page Summary Contents For ROHM BU21050FS User Guide
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 8 |
| File Size | 430.95 KB |
| Published | June 18, 2026 |
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Frequently Asked Questions
What is the recommended operating temperature range for this IC?
The recommended operating temperature range is -40°C to 85°C.
What is the required power supply voltage (AVDD and DVDD)?
Both AVDD and DVDD require a typical applied voltage between 4.5V and 5.5V.
How many sensors can the BU21050FS control?
It is a capacitive sensor controller with 8 channels (8ch).
What types of digital outputs are available from the device?
The IC provides options for either 4-bit Binary or 8 GPIO outputs.