Supporting up to 7 capacitive sensor inputs in packages as small as a 3 mm x 3 mm
QFN, the CPT007B is a highly-integrated device that provides a simple solution for add-
ing capacitive touch. The device also comes with advanced features like moisture im-
munity, wake-on proximity, and buzzer feedback for an enhanced user experience. No
firmware development is needed, and all the capacitive touch sense parameters can be
configured using a simple GUI-based configurator. By eliminating the need for complex
firmware development, the CPT007B device enables rapid user interface designs with
minimal development effort.
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The CPT007B device is ideal for a wide range of capacitive touch applications, including
the following:
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• Home appliances
• Instrument / Control panels
• White goods
• Medical equipment
• Consumer electronics
• Lighting control
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Input
Features
en
Capacitive Touch Sensing
Features
Mutually-
Exclusive Touch
Qualifier
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Proximity Wake
Input
Touch
Qualification
Input Engine
with
7 Inputs
Configuration
Profile for each
Input
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Low Power State
Machine
Lowest power mode with feature operational:
Active
Optimized Active
Low Power Sleep
silabs.com
| Smart. Connected. Energy-friendly.
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
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Baselining
Touch Time-Out
Timer
The CPT007B device, part of the TouchXpress family, is designed
to quickly replace mechanical buttons with modern capacitive
touch buttons by eliminating firmware complexity and reducing de-
velopment time.
KEY FEATURES
• No firmware development required
• Simple GUI-based configurator
• 7 Capacitive Sensor inputs with
programmable sensitivity
• 7 General purpose outputs (GPOs) to
communicate to the host processor or drive
LEDs
• 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
• Button touch time-out to avoid false
touches
• Buzzer output for audible touch feedback
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Output
Features
Configurable
Output Pin for
each Input
Optional Buzzer
Output
Preliminary Rev. 0.2
TouchXpress™ Family
CPT007B Data Sheet
CPT007B Data Sheet
Feature List and Ordering Information
1. Feature List and Ordering Information
CP T 0 07 B
–
A 02
–
G M R
Tape and Reel (Optional)
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)
TouchXpress Family
Silicon Labs Xpress Product Line
Figure 1.1. CPT007B Part Numbering
The CPT007B has the following features:
• Capacitive sensing input engine with 7 inputs
• Post-sample touch qualification engine
• Configuration profile space in non-volatile memory
• Pin output with configurable polarity and drive strength
• Low power state machine to minimize current draw in all use cases
• Capacitive proximity sensing input
• Buzzer output
• Mutually exclusive touch qualifier
• Touch time-out timer
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Pb-free
Table 1.1. Product Selection Guide
Temperature Range
(RoHS Compliant)
Part Number
Ordering
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Yes
Yes
-40 to +85 °C
-40 to +85 °C
QFN20
QSOP24
Preliminary Rev. 0.2 | 1
CPT007B-A02-GM
CPT007B-A02-GU
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Package
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Package Type — QFN20 (M), QSOP24 (U)
CPT007B Data Sheet
Typical Connection Diagrams
2. Typical Connection Diagrams
2.1 Signal, Analog, and Power Connections
Figure 2.1 Connection Diagram on page 2
shows a typical connection diagram for the power pins of CPT007B devices.
1.8-3.6 V (in)
4.7 µF and 0.1 µF
bypass capacitors
required for the power
pins placed as close to
the pins as possible.
CPT007B
Device
VDD
GND
Host
Processor
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Electrode
1.8-3.6 V (in)
Electrode
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...
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Figure 2.1. Connection Diagram
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OUT00
OUT01
OUT06
...
CS00
CS06
Config Data
Config Clk / RSTb
Preliminary Rev. 0.2 | 2
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CPT007B Data Sheet
Typical Connection Diagrams
2.2 Configuration
The diagram below shows a typical connection diagram for the configuration connections pins. The ToolStick Base Adapter is available
on the evaluation board.
CPT007B Device
Config Clk
VDD
Config Data
GND
Figure 2.2. Configuration Connection Diagram
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ToolStick
Preliminary Rev. 0.2 | 3
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1k
CPT007B Data Sheet
Electrical Specifications
3. Electrical Specifications
3.1 Electrical Characteristics
All electrical parameters in all tables are specified under the conditions listed in
Table 3.1 Recommended Operating Conditions on page
4,
unless stated otherwise.
3.1.1 Recommended Operating Conditions
Table 3.1. Recommended Operating Conditions
Parameter
Operating Supply Voltage on VDD
Minimum RAM Data Retention
Voltage on VDD
1
Operating Ambient Temperature
Symbol
V
DD
V
RAM
Not in Sleep Mode
Sleep Mode
T
A
Test Condition
Min
1.8
—
—
–40
Note:
1. All voltages with respect to GND.
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Typ
2.4
Max
3.6
—
Unit
V
1.4
0.3
—
V
0.5
85
V
°C
Preliminary Rev. 0.2 | 4
嵌入式系统
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