IPS2550 Datasheet

© 2022 Renesas Electronics Corporation

21

June 20, 2022

4. The IPS2550 IC performs a synchronous demodulation of the received signals, and then filters and outputs them for external signal

processing.

Due to the 90° phase shift of the two receiver coils, the output signals also have a 90° phase shift in relation to the target position, generating

ratiometric sine and cosine signals. The signals can be converted into an absolute position, for example by applying an arctangent operation of

Vsin and Vcos.

)

Equation 5

8.1

Overview

Figure 6. Response of the IPS2550

IPS2550

Receiver

Coil 1

Rx

(cos)

COS_SDA

COSN

SIN_SCL

SINN

Transmitter

Tx

Rx

(sin)

Receiver

Coil 2

ADR_IRQN

SDA

SCL

VDD

GND

VDDA

Power

Supply

Position, Rotation Angle

Position, Rotation Angle

Digital Interface for

Diagnostics and

Programming

Analog Output

for Programming,

Position and

Diagnostics

Figure 7 shows an example of a linear motion sensor with one transmitter coil (tx loop) and two receiver coils:

1. Sine Loop = Sin Loop 1 + Sin Loop 2

and

2. Cosine Loop = Cos Loop 1 + Cos Loop 2.

Note: the Cosine loop is shifted relative to the Sine Loop, so Cos Loop 1 is split into two halves:

Cos Loop1 = Cos Loop 1a and Cos Loop 1b