LX34211

The LX34211 is a highly accurate inductive position sensor interface IC with features that simplify the sensor design for a wide range of applications. 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.

The device includes an integrated oscillator circuit for driving the primary coil of an inductive sensor, along with two independent analog conversion paths for conditioning, converting, and processing of sine and cosine analog signals from the secondary coils of the sensor. The output signal is an DAC analog or PWM signal that represents the position with 12 bit measurement range resolution.

Each analog signal path includes adjustable AGC gain 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 airgap applications. In addition, a unique dynamic calibration algorithm corrects for errors before the on board linearization stage, maintaining accuracy over a wider range of airgaps.

The calibration information can be written to the internal nonvolatile EEPROM memory during end-of-line production resulting in improved production yields by compensating for a wider range of mechanical tolerances.

The LX34211 is available in a 14-lead TSSOP package. The device is specified over a temperature range of -40°C to +125°C making it suitable for commercial, industrial, medical, and/or automotive sensor applications.

The IC was developed using the ISO26262 standard to reach ASIL B levels as an SEooC. Redundant sensor system with two ICs can be used for ASIL-C and ASIL-D applications.

Get a head start on your design by visiting our Inductive Position Sensor Design Page

The below list of technical documents, software and reference designs are available upon request, for more information, please contact Dustin.Tenney@microchip.com or Mark.Smith@microchip.com.

- LX34211A Datasheet

- IPCE Sensor Evaluation and Calibration Software

Microchip can help with your own sensor design with its own unique mechanical constraints. You can start with one of our Kits, but Microchip is ready to help you from day one. Talk with our sales team and describe your sensor requirement. We will work with you on getting a design up and running to take advantage of this advanced technology.

Get started with your first design by ordering a position sensor evaluation kit for your first project. There are linear and rotational evaluation kits available. Each kits includes a Sensor evaluation board, a IPCE programmer, links to our IPCE software, and applicable cables. There are also separate evaluation boards and programmers available for orders.