1 Features

• 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

• 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

• Linear and Rotational Encoders

• 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

• Flow Meters in Consumer and Appliances

3 Description

The LDC1312 and LDC1314 are 2- and 4-channel,

12-bit inductance to digital converters (LDCs) for

inductive sensing solutions. With multiple channels

and support for remote sensing, the LDC1312 and

LDC1314 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 LDC1312 and LDC1314 offer well-matched

channels, which allow for differential and ratiometric

measurements. This enables 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

on existing sensing solutions and to introduce brand

new sensing capabilities to products in all markets,

especially consumer and industrial applications.

Inductive sensing offers better performance,

reliability, and flexibility than competitive sensing

technologies at lower system cost and power.

The LDC1312 and LDC1314 are easily configured via

an I2C interface. The two-channel LDC1312 is

available in a WSON-12 package and the fourchannel

LDC1314 is available in a WQFN-16

package.