Multi-channel 12-bit LDCs for inductive sensing systems

23-03-2015 | Texas Instruments | Test & Measurement

The LDC1312 and LDC1314 from Texas Instruments (TI) 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 1kHz and 10MHz to begin sensing. The wide 1kHz to 10MHz sensor
frequency range also enables use of particularly 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 four-channel
LDC1314 is available in a WQFN-16 package.

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