CY8CMBR2044

Creating a capacitive matrix keypad has never been simpler

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Overview

The CY8CMBR2044 CAPSENSE™ controller supports up to four capacitive touch-sensing buttons and four general purpose outputs (GPOs). Enabled with Infineon's SmartSense auto-tuning algorithm, it eliminates the need for manual tuning. This advancement enables designers to reduce the UI design task to the PCB layout of the sensor board – the CAPSENSE™ Express controller handles the rest.

Key Features

  • Up to four CAPSENSE™ buttons/LEDs
  • Voltage range 1.71 V to 5.5 V
  • No programming required
  • SmartSense auto-tuning
  • 15 μA per button in run mode
  • 100 nA in the deep sleep mode
  • Robust noise-immunity

Products

About

About CY8CMBR2044

The CY8CMBR2044 incorporates several innovative features to save time and money to quickly enable a capacitive touch-sensing user interface in your design. It is a hardware configurable device and does not require any software tools or coding. This device is enabled with Infineon's revolutionary SmartSense Auto-Tuning algorithm. SmartSense Auto-Tuning ends the need to manually tune the user interface during development and production ramp. This speeds the time-to-volume and saves valuable engineering time, test time, and production yield loss.

The CY8CMBR2044 CAPSENSE™ Design Guide (AN66308), provides step-by-step guidance for the sensor design and layout process, which saves valuable engineering resources, test time, improves yield, and speeds time-to-volume.

AN66308 - CY8CMBR2044 CAPSENSE™ Design Guide
Key features
  • Easiest-to-use capacitive button controller
    • Hardware-configurable four-button solution
    • No software tools or programming required
    • General purpose outputs (GPO) support direct LED drive
  • Robust noise performance
    • High sensitivity, low-noise capacitive sensing algorithm
    • Strong immunity to radio frequency (RF) and alternating current (AC) noise
    • Low radiated noise emission
  • SmartSense™ auto tuning
    • No manual tuning is required (reduces time to market)
    • All CAPSENSE™ parameters are automatically set in runtime
    • Ensures signal-to-noise ratio (SNR) of 5:1 or greater
    • Supports a wide range of input capacitance (5 pF to 40 pF)
  • Advanced features
    • Toggle feature on GPO
    • Flanking sensor suppression (FSS) provides robust sensing even with closely spaced sensors
    • Delay off feature (configurable LED run time)
  • Wide operating range
    • 1.71 V to 5.5 V ideal for unregulated battery applications
  • Low power consumption
    • Supply current in run mode as low as 15 μA for every button
    • 100 nA deep sleep current
  • -40°C to + 85°C Industrial temperature range
  • 16-pad QFN package (3 mm × 3 mm x 0.6 mm)
CAPSENSE™ touch-sensing buttons

The CY8CMBR2044 CAPSENSE™ controller supports up to ten capacitive touch-sensing buttons and ten general purpose outputs (GPO). The GPO is an active low output controlled directly by the CAPSENSE™ input making it ideal for a wide variety of consumer, industrial, and medical applications. The wide operating range of 1.71 V to 5.5 V enables unregulated battery operation, further saving component cost. The same device can also be used in different applications with varying power supplies.

Noise Immunity

The CY8CMBR2044 CAPSENSE™ Express family includes noise immunity and FSS. Noise immunity improves the immunity of the device against radiated and conducted noise, such as audio and radio frequency (RF) noise. FSS provides robust sensing even with closely spaced buttons. FSS is a critical requirement in small form factor applications. 

Serial debug data output gives the critical information about the design, such as button Cp and signal-to-noise Ratio (SNR). This further helps in production line testing.

About CY8CMBR2044

The CY8CMBR2044 incorporates several innovative features to save time and money to quickly enable a capacitive touch-sensing user interface in your design. It is a hardware configurable device and does not require any software tools or coding. This device is enabled with Infineon's revolutionary SmartSense Auto-Tuning algorithm. SmartSense Auto-Tuning ends the need to manually tune the user interface during development and production ramp. This speeds the time-to-volume and saves valuable engineering time, test time, and production yield loss.

The CY8CMBR2044 CAPSENSE™ Design Guide (AN66308), provides step-by-step guidance for the sensor design and layout process, which saves valuable engineering resources, test time, improves yield, and speeds time-to-volume.

AN66308 - CY8CMBR2044 CAPSENSE™ Design Guide

Key features
  • Easiest-to-use capacitive button controller
    • Hardware-configurable four-button solution
    • No software tools or programming required
    • General purpose outputs (GPO) support direct LED drive
  • Robust noise performance
    • High sensitivity, low-noise capacitive sensing algorithm
    • Strong immunity to radio frequency (RF) and alternating current (AC) noise
    • Low radiated noise emission
  • SmartSense™ auto tuning
    • No manual tuning is required (reduces time to market)
    • All CAPSENSE™ parameters are automatically set in runtime
    • Ensures signal-to-noise ratio (SNR) of 5:1 or greater
    • Supports a wide range of input capacitance (5 pF to 40 pF)
  • Advanced features
    • Toggle feature on GPO
    • Flanking sensor suppression (FSS) provides robust sensing even with closely spaced sensors
    • Delay off feature (configurable LED run time)
  • Wide operating range
    • 1.71 V to 5.5 V ideal for unregulated battery applications
  • Low power consumption
    • Supply current in run mode as low as 15 μA for every button
    • 100 nA deep sleep current
  • -40°C to + 85°C Industrial temperature range
  • 16-pad QFN package (3 mm × 3 mm x 0.6 mm)

CAPSENSE™ touch-sensing buttons

The CY8CMBR2044 CAPSENSE™ controller supports up to ten capacitive touch-sensing buttons and ten general purpose outputs (GPO). The GPO is an active low output controlled directly by the CAPSENSE™ input making it ideal for a wide variety of consumer, industrial, and medical applications. The wide operating range of 1.71 V to 5.5 V enables unregulated battery operation, further saving component cost. The same device can also be used in different applications with varying power supplies.

Noise Immunity

The CY8CMBR2044 CAPSENSE™ Express family includes noise immunity and FSS. Noise immunity improves the immunity of the device against radiated and conducted noise, such as audio and radio frequency (RF) noise. FSS provides robust sensing even with closely spaced buttons. FSS is a critical requirement in small form factor applications. 

Serial debug data output gives the critical information about the design, such as button Cp and signal-to-noise Ratio (SNR). This further helps in production line testing.

Documents

Documents

Design resources

Developer community

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