LDC2112PWT

ADCs/DACs - Special Purpose Overview

The LDC2112PWT is a two-channel inductance-to-digital converter from Texas Instruments, designed for low-power human-machine interface applications. It features 12-bit resolution and operates on a single 1.8 V supply (1.71 V to 1.89 V). The device integrates algorithms for touch sensing, including environmental drift compensation and simultaneous button detection. It communicates via an I2C interface with a maximum clock frequency of 400 kHz. Operating within a temperature range of -40°C to +85°C, it is housed in a 16-pin TSSOP package.

ADCs/DACs - Special Purpose Feature Summary

• Two-channel inductance-to-digital conversion with 12-bit resolution
• Integrated algorithms for touch sensing, force measurement, and EMI immunity
• I2C digital interface supporting up to 400 kHz clock speed
• Ultra-low power consumption: 6 µA per button at 0.625 SPS

ADCs/DACs - Special Purpose Applications

• Touch buttons on metal, glass, plastic, or wood surfaces
• Force measurement in consumer electronics
• Smartphones, tablets, and wearable devices
• Industrial control panels and handheld devices

ADCs/DACs - Special Purpose Procurement Notes

The LDC2112PWT is listed as obsolete by the manufacturer. Product Change Notification PCN 22/Feb/2022 and End-of-Life notice dated 09/Nov/2023 confirm discontinuation. Designers should verify availability through authorized distributors and consider replacement components for new designs.

ADCs/DACs - Special Purpose Selection Notes

Select this component only for maintenance or legacy system repairs due to its discontinued status. For new projects, evaluate alternative inductive touch controllers from the same family or newer generations that offer active production support and longer supply chain stability.

ADCs/DACs - Special Purpose Part Context

This part belongs to the LDC2112/LDC2114 series of inductive touch solutions. The 'PWT' suffix indicates a 16-pin Thin-Shrink Small-Outline Package (TSSOP) with a 0.65 mm pin pitch. It serves as the surface-mount variant of the LDC2112, offering a compact footprint suitable for space-constrained portable electronics.

ADCs/DACs - Special Purpose Replacement Considerations

Texas Instruments recommends the LDC2112PWR as a manufacturer-recommended substitute. Verify pinout compatibility and software configuration requirements before transitioning to the PWR package variant.