1 Features

? AEC-Q100 qualified with the following results:

– Device temperature grade 0: –40°C to +160°C

ambient operating temperature

? Integrated analog front-end IC for contact-less,

inductive position sensors for absolute rotary

position from 0° to 360°

? Removes the need for magnets, lowering system

cost

? Supports operation in harsh environments;

immune to stray magnetic fields, dirt, and

contamination

? High resolution and accuracy of ≤ 1 degree at

rotational speeds up to 480,000 RPM

? Differential signal paths with sine and cosine

outputs supporting a wide dynamic input range

? 5-V and 3.3-V input supply operating modes

? Integrated LC oscillator in the 2.4-MHz to 5-MHz

band to excite the inductive sensor coil

? Differential output drivers with high-voltage

protection and large capacitive load capability

? Automatic and manual gain control to maximize

dynamic range of output drivers

? Functional Safety-Compliant

– Developed for functional safety applications

– Documentation available to aid ISO 26262

system design

– Systematic capability up to ASIL C(D)

– Hardware capability up to ASIL C

? Extensive IC, sensor input, output, and supply pin

diagnostics

? Reverse voltage and overvoltage protection on

input supply and output pins from –15 V to 30 V

? Supports redundant mode for functional safety

2 Applications

? Rotary Position Sensors for:

– EV/HEV traction motor inverters

– Electric power steering

– Brake boost motors

– Integrated starter generators

? Small angular or arc-motion sensors for:

– Pedal position

– Valves and actuators

– Robots

3 Description

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.