LDC2114PWR

ADCs/DACs - Special Purpose Overview

The LDC2114PWR is a four-channel inductance-to-digital converter from Texas Instruments, designed for low-power human-machine interface (HMI) and touch button applications. It features a 12-bit resolution and operates on a single supply voltage ranging from 1.71 V to 1.89 V. The device utilizes an I2C interface with a maximum clock frequency of 400 kHz and functions within a temperature range of -40°C to +85°C. Packaged in a 16-pin TSSOP with dimensions of 5 mm x 4.4 mm and a maximum height of 1.2 mm, it integrates algorithms for environmental drift compensation and simultaneous button detection.

ADCs/DACs - Special Purpose Feature Summary

• Four independent channels with 12-bit resolution for precise inductance measurement
• Integrated algorithms enabling adjustable force thresholds, environmental drift compensation, and simultaneous press detection
• Ultra-low power consumption: 6 µA at 0.625 SPS for one button and 72 µA at 20 SPS for two buttons
• Robust EMI performance compliant with CISPR 22 and CISPR 24 standards

ADCs/DACs - Special Purpose Applications

• Touch buttons on various materials including metal, plastic, glass, and wood
• Force measurement applications for touch interfaces
• Power on/off buttons in battery-powered devices due to ultra-low power modes

ADCs/DACs - Special Purpose Part Context

The LDC2114PWR belongs to the LDC211x family of inductive touch solutions, which also includes the two-channel LDC2112. While the LDC2112 offers dual channels, the LDC2114 provides four channels for more complex HMI designs. Both variants share similar core technologies, such as LC resonators for noise rejection and integrated sensing algorithms, but differ in channel count and package options like DSBGA or TSSOP.

ADCs/DACs - Special Purpose Replacement Considerations

The LDC2114YFDR is a manufacturer-recommended alternative to the LDC2114PWR, offering the same functional specifications but in a DSBGA-16 package instead of the TSSOP-16. Designers requiring the TSSOP form factor should verify availability of current production units, as some listings indicate end-of-life status for specific packages.