Cypress Semiconductor today released a new four-button version of its capacitive-sensing controller technology, intended to cut system-design time and expand the market for such applications.
The CY8CMBR2044 CapSense Express Mechanical Button Replacement controller uses a special algorithm that eliminates the need to tune the sensing application during the design process.
Supply current in run mode: 15 uA per button
Deep sleep current:100 nA
16-pad QFN package: 3x3x0.6mm.
The Smart Sense auto-tuning feature aims to eliminate weeks from the design process, according to Dirk Franklin, CapSense business unit director for Cypress.
“It can take three weeks to tune the user interface,” Franklin said in an interview. “You have to get boards built and tune it, and it’s usually a few iterations.”
SmartSense, which is patent-pending, features:
Automatic adjustment for manufacturing variation e.g., PCB, Overlay thickness
Automatic calibrating out of variations in environmental noise
Support for up to 33 CapSense I/Os and 6 Sliders
Patented algorithm for robust immunity to conducted and radiated noise.
With most capacitive-sensing applications, the engineer has 17-18 parameters that have to be gauged and tuned, Franklin said. “It’s not just drop it in and go. Our algs make it so they’re automatically sensed and accounted for with the capacitance of the part.”
Franklin showed off a CapSense Express demo board in an interview with EE Times, below:
Franklin argues that the CapSense Express helps cut the learning curve associated with touch-sense applications and therefore broadens the market potential such that mechanical engineers, for example, might be drawn to the technology.
Pricing: <$1.00 in 1,000-piece quantities. Availability: Production quantities available now. More resources:
Cypress earlier this year hosted an EE Times Webinar on designing capacitive-sensing systems.