The LDC3114 is a 4-channel inductance-to-digital converter for low-power proximity and touch button sensing

The LDC3114 is an inductive sensing device that measures small deflections of conductive targets using coils that can be implemented on a small printed circuit board (PCB) located on the back, enabling human-machine interface (HMI) detection on a variety of materials. Touch button design panel. By allowing access to raw data representing inductance values, the technology can be used for accurate linear position sensing of metallic targets in automotive, consumer and industrial applications. Inductive sensing solutions are not sensitive to humidity or non-conductive contaminants such as oil and dirt.

The button mode of the LDC3114 automatically corrects any deformation of the conductive target. The LDC3114 provides well-matched channels that allow differential and ratiometric measurements to compensate for environmental and aging conditions such as temperature and mechanical drift. The LDC3114 includes an ultra-low power mode suitable for a power on/off button or AD5751BCPZ position sensor in battery powered applications.

The LDC3114 can be easily configured through the I 2 C interface. The LDC3114 is available in a 16-pin TSSOP package.

characteristic:

●Multiple operating modes:

○ Raw Data Mode: Access preprocessed inductance measurement data to enable advanced algorithms on the MCU for linear sensing

○ Button Mode: Button press detection with baseline tracking and advanced on-chip post-processing

○ Force level measurement of touch buttons

●LDC3114 compatible pins and registers

● Strong EMI performance supports CISPR 22 and CISPR 24 compliance

●Four independent channel operation

● Configurable scan rate:

○0.625 SPS to 160 SPS

○ Continuous scan option

●Advanced key detection algorithm:

○ Adjustable force threshold per button

○Environmental offset compensation

○ Simultaneous button press detection

●Low current consumption:

○One-touch: 6 μA at 0.625 SPS

○ Two buttons: 72 μA at 20 SPS

●Temperature range

○TSSOP (16): –40°C to +125°C

●Interface:

○ 1.8V and 3.3V compliant I 2 C and INTB

○ 1.8V logic output per channel for push buttons

parameter:

Applications: Inductive touch buttons, encoders/event counters, metal proximity detection

Number of input channels: 4

VS (max) (V): 1.89

VS (min) (V): 1.71

Operating temperature range (°C): -40 to 125

About. Price (USD): 1ku | 1.099