TI LDC2114PWR

With inductive sensing technology, designers can measure small displacements of conductive targets, enabling the design of touch buttons for human-machine interfaces (HMIs) on various materials such as metal, glass, plastic, and wood. The sensor of the inductive touch system is a coil that can be implemented on a small PCB. This PCB is located behind the panel to protect it from the external environment. Inductive sensing solutions are immune to interference from humidity or non-conductive contaminants such as oil, grease, and dust. It can automatically correct any deformation of the conductive target. The LDC2112/LDC2114 is a multi-channel, low-noise inductive digital converter that uses an integrated algorithm to enable inductive touch applications. This device features an innovative LC resonator that provides high suppression of noise and interference. The LDC2112/LDC2114 can reliably detect material displacements of less than 200 nm. The LDC2112/LDC2114 also offers an ultra-low-power mode for use with on/off buttons in battery-powered applications.

• Low power consumption:
  • Single button: 6 μA (at 0.625SPS)
  • Two buttons: 72 μA (at 20SPS)
• Configurable button scan rate: 0.625SPS to 80SPS
• Stress level measurement for touch buttons
• Independent channel operation:
  • Dual-channel for LDC2112
  • Four-channel for LDC2114
• Integrated algorithm supporting:
  • Per-button force threshold adjustment
  • Ambient variation compensation
  • Simultaneous button press detection
• Standalone operation without MCU
• Interface:
  • I²C
  • Dedicated logic output per channel

• Consumer Electronics:
  • Smartphones
  • Smartwatches and other wearables
  • Smart speakers
  • Tablets/PCs
  • VR headsets
  • Soundbars
• Industrial Applications:
  • TVs
  • Handheld devices
  • Home appliances
  • HMI panels and keyboards