1 Features

1• Easy-to-Use – Minimal Configuration Required

• Up to 4 Channels With Matched Sensor Drive

• Multiple Channels Support Environmental and

Aging Compensation

• Remote Sensor Position of >20 cm Supports

Operation In Harsh Environments

• Pin-Compatible Medium and High-Resolution

Options:

– LDC1312/4: 2/4-ch 12-Bit LDC

– LDC1612/4: 2/4-ch 28-Bit LDC

• Sensing Range Beyond Two Coil Diameters

• Supports Wide Sensor Frequency Range of 1 kHz

to 10 MHz

• Power Consumption:

– 35 μA Low Power Sleep Mode

– 200 nA Shutdown Mode

• 2.7 V to 3.6 V Operation

• Multiple Reference Clocking Options:

– Included Internal Clock For Lower System

Cost

– Support for 40 MHz External Clock For Higher

System performance

• Immunity to DC Magnetic Fields and Magnets

2 Applications

• Knobs in Consumer, Appliances, and Automotive

• Buttons in Home Electronics, Wearables,

Manufacturing, and Automotive

• Keypads in Manufacturing and Appliances

• Slider Buttons in Consumer Products

• Metal Detection in Industrial and Automotive

• POS and EPOS

3 Description

The LDC1612 and LDC1614 are 2- and 4-channel,

28-bit inductance to digital converters (LDCs) for

inductive sensing solutions. With multiple channels

and support for remote sensing, the LDC1612 and

LDC1614 enable the performance and reliability

benefits of inductive sensing to be realized at minimal

cost and power. The products are easy to use, only

requiring that the sensor frequency be within 1 kHz

and 10 MHz to begin sensing. The wide 1 kHz to 10

MHz sensor frequency range also enables use of

very small PCB coils, further reducing sensing

solution cost and size.

The high resolution channels allow for a much larger

sensing range, maintaining good performance

beyond two coil diameters. Well-matched channels

allow for differential and ratiometric measurements,

which enable designers to use one channel to

compensate their sensing for environmental and

aging conditions such as temperature, humidity, and

mechanical drift.

Given their ease of use, low power, and low system

cost these products enable designers to greatly

improve performance, reliability, and flexibility over

existing sensing solutions and to introduce brand new

sensing capabilities to products in all markets,

especially consumer and industrial applications.

These devices are easily configured via an I2C

interface. The two-channel LDC1612 is available in a

WSON-12 package and the four-channel LDC1614 is

available in a WQFN-16 package.