Automotive inductive position sensor front end with sine/cosine interface

The LDC5072-Q1 IC is an

analog front-end for contact-less, inductive position sensors targeted for absolute

rotary position in

automotive and industrial applications. The LDC5072-Q1

excites a coil that is typically printed on a printed circuit board (PCB). The

excitation is coupled back into two sets of receiver coils on the same PCB using a

conductive target that is placed in close proximity of the PCB. The conductive

target can also be a pattern printed on another PCB. The coil PCB stays stationary

and the target moves with the motor, actuator, or valve. The excitation coil

generates a secondary voltage on the receiver coils depending on the position of the

target relative to the receiver coils. A signal representation of the position is

obtained by reading in the voltages from the receiver coils, processing it, and

giving analog outputs representing the Sine and Cosine components of the position of

the target.