TLE5012B datasheet(17/50 Pages) INFINEON

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TLE5012B

Application Circuits

Data Sheet

Rev. 2.0, 2014-02

The TLE5012B can be configured with SPC only (Figure 3-5). This is only possible with the TLE5012B - E9000

derivate, which is by default configurated with an open-drain IFA (SPC) pin.

Figure 3-5 Application circuit for TLE5012B with only SPC interface (using internal CLK)

In Figure 3-5 the IFC (S_NR[1]) and SCK (S_NR[0]) pins are set to ground to generate the slave number (S_NR)

0D (or 00B). For safety reasons it is better that the non-used pins are connected to ground, rather than floating. A

resistor between the DATA line pin and ground is recommended to avoid shortcuts if DATA generates any

unexpected output. The CSQ line has to be connected to VDD to avoid unintentional activation of the SSC interface.

Synchronous Serial Communication (SSC) configuration

In Figure 3-1 and Figure 3-2 the SSC interface has the default push-pull configuration (see details in Figure 3-6).

Series resistors on the DATA, SCK (serial clock signal) and CSQ (chip select) lines are recommended to limit the

current in the erroneous case that either the sensor pushes high and the microcontroller pulls low at the same time

or vice versa. The resistors in the SCK and CSQ lines are only necessary in case of disturbances or noise.

Figure 3-6 SSC configuration in sensor-slave mode with push-pull outputs (high-speed application)

VRG

VRA

VRD

TLE5012B

GMR

Temp

SD-

ADC

SD-

ADC

SD-

ADC

SSC Interface

Incremental IF

PWM

HSM

Osc

*) recommended , e.g. 2.2kΩ

100nF

IFC (S_NR[1])

VDD (3.0 – 5.5V)

**)

GND

PLL

CSQ

SCK (S_NR[0])

DATA

IFA (SPC )

IFB

**) recommended , e.g. 10.0kΩ

Digital

Signal

Processing

Unit

CORDIC

CCU

RAM

ISM

Fuses

Shift Reg.

Clock Gen.

DATA

MTSR

MRST

SCK

(SSC Slave) TLE 5012B

µC (SSC Master)

CSQ

**)

*) optional , e.g. 100 Ω

**) optional , e.g. 470 Ω

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