Renesas CTSU Manuals

Manuals and User Guides for Renesas CTSU. We have 1 Renesas CTSU manual available for free PDF download: Application Note

Renesas CTSU Application Note

Renesas CTSU Application Note (23 pages)

Capacitive Sensor MCU

Brand: Renesas | Category: Security Sensors | Size: 2 MB

Table of Contents

Table of Contents
1
Overview
3
Noise Types and Countermeasures
4
EMC Standards
4
RF Noise Countermeasures
5
ESD Noise (Electrostatic Discharge)
8
EFT Noise (Electrical Fast Transients)
8
CTSU Noise Countermeasure Functions
9
Measurement Principles and Effect of Noise
9
Ctsu1
9
Random Phase Shift Function
9
High-Frequency Noise Reduction Function (Spread Spectrum Function)
10
Ctsu2
10
Multi-Frequency Measurement
10
Active Shield
11
Non-Measurement Channel Output Selection
11
Hardware Noise Countermeasures
12
Typical Noise Countermeasures
12
Touch Electrode Pattern Designs
12
Power Supply Design
13
Voltage Supply Design
13
GND Pattern Design
14
Processing Unused Pins
14
Radiated RF Noise Countermeasures
15
TS Pin Damping Resistance
15
Digital Signal Noise
15
Multi-Frequency Measurement
15
Conducted Noise Countermeasures
16
Common Mode Filter
16
Capacitor Layout
16
Multi-Frequency Measurement
17
Considerations for GND Shield and Electrode Distance
17
Software Filters
18
IIR Filter
18
FIR Filter
19
Usage Examples
19
Usage Notes Regarding Measurement Cycle
19
Revision History
21
Corporate Headquarters
23
Contact Information
23

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