Touch Controller. CPT212B Datasheet

CPT212B Controller. Datasheet pdf. Equivalent

Part CPT212B
Description Capacitive Touch Controller
Feature TouchXpress™ Family CPT212B Data Sheet The CPT212B device, part of the TouchXpress family, is desig.
Manufacture Silicon Laboratories
Datasheet
Download CPT212B Datasheet



CPT212B
TouchXpress™ Family
CPT212B Data Sheet
The CPT212B device, part of the TouchXpress family, is designed
to quickly add capacitive touch via an I2C interface by eliminating
the firmware complexity and reducing the development time for ca-
pacitive sensing applications.
Supporting up to 12 capacitive sensor inputs in packages as small as a 3 mm x 3 mm
QFN, the CPT212B is a highly-integrated device that interfaces via I2C to the host pro-
cessor to provide a simple solution for adding capacitive touch. The device also comes
with advanced features like moisture immunity, wake-on proximity, and buzzer feedback
for an enhanced user experience. No firmware development is needed, and all the ca-
pacitive touch sense parameters can be configured using a simple GUI-based configura-
tor. By eliminating the need for complex firmware development, the CPT212B device en-
ables rapid user interface designs with minimal development effort.
The CPT212B device is ideal for a wide range of capacitive touch applications including
the following:
• Home appliances
• Instrument / Control panels
• White goods
• Medical equipment
• Consumer electronics
• Lighting control
KEY FEATURES
• No firmware development required
• Simple GUI-based configurator
• 12 Capacitive Sensor inputs with
programmable sensitivity
• I2C interface to communicate to and
configure from the host
• Lowest power capacitive sense solution
• Active — 200 µA
• Sleep — 1 µA
• Wake on proximity
• Superior noise immunity: SNR up to 270:1
• Moisture immunity
• Mutually-exclusive touch qualifier
• Buzzer output for audible touch feedback
Input
Features
Capacitive Touch Sensing
Features
Output
Features
Proximity Wake
Input
Input Engine
with
12 Inputs
Touch
Qualification
Mutually-
Exclusive Touch
Qualifier
Configuration
Profile for each
Input
Baselining
I2C Output
I2C Event Buffer
Interrupt Pin
Optional Buzzer
Output
Low Power State
Machine
Lowest power mode with feature operational:
Active
Optimized Active
Low Power Sleep
silabs.com | Building a more connected world.
Rev. 1.1



CPT212B
1. Feature List and Ordering Information
CPT212B Data Sheet
Feature List and Ordering Information
CP T 2 12 B A 01 G M R
Tape and Reel (Optional)
Package Type — QFN20 (M)
Temperature Grade — –40 to +85 °C (G)
Firmware Revision
Hardware Revision
Capacitive Sense Features — Button (B)
Number of Capacitive Sense Inputs
Interface Type — GPO (0), I2C (1), Configuration I2C (2)
TouchXpress Family
Silicon Labs Xpress Product Line
Figure 1.1. CPT212B Part Numbering
The CPT212B has the following features:
• Capacitive sensing input engine with 12 inputs
• Post-sample touch qualification engine
• Configuration profile space in non-volatile memory
• I2C event buffer with interrupt pin to signal when new touch events have been qualified
• Configuration loading with both the dedicated configuration interface and through the I2C interface
• Low power state machine to minimize current draw in all use cases
• Capacitive proximity sensing input
• Buzzer output
• Mutually-exclusive touch qualifier
Table 1.1. Product Selection Guide
CPT212B-A01-GM
Yes Yes
-40 to +85 °C
QFN20
See http://www.silabs.com/products/interface/capacitive-touch-controllers for other devices available in the TouchXpress family.
silabs.com | Building a more connected world.
Rev. 1.1 | 2





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