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4-Channel HMI Inductive Touch Buttons for Consumer and Low-Power Applications

Availability: 8,063


Package | PIN: DSBGA (YFD) | 16
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $2.30
10-24 $2.06
25-99 $1.91
100-249 $1.67
250-499 $1.54
500-749 $1.29
750-999 $1.06
1000+ $0.97


  • Low Power Consumption:
    • One Button: 6 µA at 0.625 SPS
    • Two Buttons: 72 µA at 20SPS
  • Configurable Button Scan Rates:
    • 0.625 SPS to 80 SPS
  • Force Level Measurement of Touch Buttons
  • Independent Channel Operation:
    • Two Channels for LDC2112
    • Four Channels forLDC2114
  • Integrated Algorithms to Enable:
    • Adjustable Force Threshold per Button
    • Environmental ShiftCompensation
    • Simultaneous Button PressDetection
  • Supports Independent Operation without MCU
  • Robust EMI Performance:
    • Allows for CISPR 22 and CISPR 24Compliance
  • Operating Voltage Range: 1.8 V ± 5%
  • Temperature Range: –40 °C to +85 °C
  • Interface:
    • I2C
    • Dedicated Logic Output perChannel

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Texas Instruments  LDC2114YFDR

Inductive sensing technology enables touch button design for human machine interface(HMI) on a wide variety of materials such as metal, glass, plastic, and wood, by measuring smalldeflections of conductive targets. The sensor for an inductive touch system is a coil that can beimplemented on a small PCB located behind the panel and protected from the environment. Inductivesensing solution is insensitive to humidity or non-conductive contaminants such as oil and dirt. Itis able to automatically correct for any deformation in the conductive targets.

The LDC2112/LDC2114 is a multi-channel low-noise inductance to digital converter withintegrated algorithms to implement inductive touch applications. The device employs an innovativeLC resonator that offers high rejection of noise and interference. The LDC2112/LDC2114 can reliablydetect material deflections of less than 200 nm.

The LDC2112/LDC2114 includes an ultra-low power mode intended for power on/off buttons inbattery powered applications.

The LDC2112/LDC2114 is available in a 16-pin DSBGA or TSSOP package. The 0.4 mm pitchDSBGA package has a very small 1.6 × 1.6 mm nominal body size with a maximum height of 0.4 mm. The0.65 mm pitch TSSOP package has a 5.0 × 4.4 mm nominal body size with a maximum height of 1.2 mm.