TLE5012B datasheet(11/50 Pages) INFINEON

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TLE5012B

Functional Description

Data Sheet

Rev. 2.0, 2014-02

SSC interface to use an external clock signal supplied on the IFC pin as source for the PLL, instead of the internal

clock. External clock mode is only available in PWM or SPC interface configuration.

2.2.3

SD-ADC

The Sigma-Delta Analog-Digital-Converters (SD-ADC) transform the analog GMR voltages and temperature

voltage into the digital domain.

2.2.4

Digital Signal Processing Unit

The Digital Signal Processing Unit (DSPU) contains the:

•

Intelligent State Machine (ISM), which does error compensation of offset, offset temperature drift, amplitude

synchronicity and orthogonality of the raw signals from the GMR bridges, and performs additional features

such as auto-calibration, prediction and angle speed calculation

•

COordinate Rotation DIgital Computer (CORDIC), which contains the trigonometric function for angle

calculation

•

Capture Compare Unit (CCU), which is used to generate the PWM and SPC signals

•

Random Access Memory (RAM), which contains the configuration registers

•

Laser Fuses, which contain the calibration parameters for the error-compensation and the IC default

configuration, which is loaded into the RAM at startup

2.2.5

Interfaces

Bi-directional communication with the TLE5012B is enabled by a three-wire SSC interface. In parallel to the SSC

interface, one secondary interface can be selected, which is available on the IFA, IFB, IFC pins:

•PWM

•

Incremental Interface

•

Hall Switch Mode

•

Short PWM Code

By using pre-configured derivates (see Chapter 5), the TLE5012B can also be operated with the secondary

interface only, without SSC communication.

2.2.6

Safety Features

The TLE5012B offers a multiplicity of safety features to support the Safety Integrity Level (SIL) and it is a PRO-

SILTM product.

Safety features are:

•

Test vectors switchable to ADC input (activated via SSC interface)

•

Inversion or combination of filter input streams (activated via SSC interface)

•

Data transmission check via 8-bit Cyclic Redundancy Check (CRC) for SSC communcation and 4-bit CRC

nibble for SPC interface

•

Built-in Self-test (BIST) routines for ISM, CORDIC, CCU, ADCs run at startup

•

Two independent active interfaces possible

•

Overvoltage and undervoltage detection

Disclaimer

PRO-SIL™ is a Registered Trademark of Infineon Technologies AG.

The PRO-SIL™ Trademark designates Infineon products which contain SIL Supporting Features.

SIL Supporting Features are intended to support the overall System Design to reach the desired SIL (according

to IEC61508) or A-SIL (according to ISO26262) level for the Safety System with high efficiency.

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