IPS2200 Datasheet

Jan.19.21

Page 14

Symbol

Parameter

Conditions

Minimum

Typical

Maximum

Units

Write

temperature

Allowed ambient

temperature range for read

and write access

-40

125

°C

Read

temperature

-40

125

°C

Endurance[a]

Over product lifetime

100

NVM Write Cycles

Read Cycles

NVM Read events

[a]

Verified number of program/erase cycles. Qualified with 200 cycles

Table 15. Electrostatic Discharges (ESD)

Symbol

Parameter

Conditions

Classification

Units

ESD tolerance for pins OUT1, OUT2,

OUT3, OUT4, CSN_IRQN, VDD

According to AEC-Q100-002 / JS-001,

HBM100pF/

1.5kΩ

3A: 4000 to < 8000

V

ESD tolerance for pins RX1, RX2, RX3,

RX4, VDDA, SCK_SCL, SIO_SDA

2: 2000 to < 4000

ESD tolerance for pins TX1, TX2

1A: 250 to < 500

[a]

When handling semiconductor devices such as IPS2200, always observe ESD guidelines to avoid electrostatic discharges on

these parts.

7.

Circuit Description

7.1

Overview

The IPS2200 sensor circuit consists of one transmitter coil and two receiver coils, which are typically designed

as traces on a printed circuit board. The two receiver coils have a sinusoidal shape and are shifted by 90° with

respect to each other; refer to Figure 6 and Figure 7 for typical coil shapes. A metal target is placed above the

coil arrangement.

Circuit signal flow:

1.

The IPS2200 drives AC current into the transmitter coil and generates an alternating magnetic field.

2.

The magnetic field induces voltages in the receiver coils. Without a metallic target, due to the balanced, anti-

serial connection of their segments, the voltages are compensated to achieve zero output at each pair of

terminals.

3.

If a metal target is placed above the coils:

a.

The magnetic field induces eddy currents on the surface of the metal target.

b.

The eddy currents generate a counter magnetic field, thus reducing the total flux density underneath.

c.

The voltage induced in the receiver coil areas underneath the target is reduced, creating an imbalance in

the anti-serial coil segment voltages

d.

An output voltage occurs on the terminals, changing amplitude and polarity with the target position.

4.

The IPS2200 IC amplifies, rectifies, and filters the receiver voltages 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.

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Equation 3