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 small deflections of conductive targets. The sensor for an inductive touch system is a coil that can be implemented on a small PCB located behind the panel and protected from the environment. Inductive sensing solution is insensitive to humidity or non-conductive contaminants such as oil and dirt. It is able to automatically correct for any deformation in the conductive targets.
The LDC2112/LDC2114 is a multi-channel low-noise inductance to digital converter with integrated algorithms to implement inductive touch applications. The device employs an innovative LC resonator that offers high rejection of noise and interference. The LDC2112/LDC2114 can reliably detect material deflections of less than 200 nm.
The LDC2112/LDC2114 includes an ultra-low power mode intended for power on/off buttons in battery powered applications.
The LDC2112/LDC2114 is available in a 16-pin DSBGA or TSSOP package. The 0.4 mm pitch DSBGA package has a very small 1.6 × 1.6 mm nominal body size with a maximum height of 0.4 mm. The 0.65 mm pitch TSSOP package has a 5.0 × 4.4 mm nominal body size with a maximum height of 1.2 mm.
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|Part number||Order||Features||Operating temperature range (C)||Vs (Min) (V)||Package Group||Vs (Max) (V)||Package size: mm2:W x L (PKG)||Rating|
||Baseline compensated output||-40 to 85||1.71||
DSBGA | 16
TSSOP | 16
16DSBGA: 5 mm2: 2.2 x 2.2 (DSBGA | 16)
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)
||Switch output||-40 to 125||1.71||WSON | 8||3.46||8WSON: 4 mm2: 2 x 2 (WSON | 8)||Catalog|
||Raw code digital output||-40 to 125||1.71||VSON | 10||3.46||10VSON: 9 mm2: 3 x 3 (VSON | 10)||Catalog|
||Raw code digital output||-40 to 125||2.7||WSON | 12||3.6||12WSON: 16 mm2: 4 x 4 (WSON | 12)||Catalog|