The LX34311 is a highly integrated programmable data conversion IC designed for interfacing to and managing of inductive position sensors. These sensors use printed circuit board (PCB) traces to accurately detect the location of the metal target and are immune to stray magnetics fields and eliminate the need of a magnet, required with other types of magnetic field based sensors. This IC has more automatic gain control (AGC) in and a dynamic calibration algorithm that makes it easier to design accurate sensors with larger air gap and more mechanical tolerances with less current. It also has an onboard temperature sensor accesible throught the use of SENT interfacing.

LX34311 includes an integrated oscillator circuit for driving the primary coil of an inductive sensor, along with two independent analog conversion paths for the conditioning, converting and processing of sine and cosine analog signals from the secondary coils of the sensor. The output signal is programmable and can either be a DAC (Digital-to-Analog Converter), Analog, PWM or SENT signal that represents the target position with a 12-bit measurement range resolution.

The analog signal path includes adjustable AGC and digital calibration capability to match the mechanical system variation and maximize accuracy. The AGC unit has improved gain for an even wider range of target-to-sensor air gap applications. A unique dynamic calibration algorithm corrects for errors before the on-board linearization stage, maintaining accuracy over a wider range of air gaps.Read more