TLE5014 datasheet(24/45 Pages) INFINEON

24 / 45 page

Final Datasheet

Rev. 1.0

2018-04-04

TLE5014

Interfaces

This chapter describes the interfaces of the sensor. Several interfaces are implemented, the active interface is

predefined by Infineon and can not be changed. The available preconfigured devices are described in

Chapter 6. The indicated parameters apply to the full operating range, unless otherwise specified. The typical

values correspond to a supply voltage VDD = 5.0V and an ambient temperature of TA = 25°C, unless individually

specified. All other values correspond to -40°C < TA < 125°C

4.1

Sensor Output Driver

The TLE5014 has an output driver on the pin IFB which can be switched from a push-pull configuration to a

quasi-open drain with active controlled slope.

• The push-pull configuration is preferred with SENT and PWM interface. It has controlled rising and falling

slopes to reduce EMC emission and provides a controlled and defined pulse length independent of

external circuitry. The push-pull output driver switches between 0V and VDD. An additional pull-down or

pull-up resistor is recommended to ensure a defined output level at sensor start-up.

• For the SPC interface the open drain setting with controlled slopes is required. In this configuration, the

TLE5014 has controlled rising and falling slopes but after reaching the HIGH-level, the output is switched

to an open-drain behavior. The HIGH level is then maintained by the external pull-up resistor. It is

necessary, that the sensor releases the output line once reaching the HIGH level so that the master (µ-

Controller) can issue the SPC trigger pulse by pulling the line low.

4.2

Pulse Width Modulation (PWM) Interface

PWM Interface: An uni-directional interface with the angle information coded in the length of a pulse. The

angle value is proportional to the duty cycle of the output frequency.

The duty cycle is calculated as the ratio of the “high” time to the period length. An increasing angle results in

an increased duty cycle, with an angle of 0° having the smallest duty cycle.

The starting edge of the PWM protocol can be programmed as rising or falling edge. In case the protocol shall

start with a rising edge (start with a LOW level), a pull-down resistor is required (see Figure 2-2). For the start-

up condition with a falling edge (start with a HIGH level), a pull-up resistor instead has to be implemented.

The tolerance of the programmed PWM frequency over temperature and lifetime is given in Table 4-2

Table 4-1

PWM Interface

Parameter

Symbol

Values

Unit

Note / Test Condition

Min.

Typ.

Max.

PWM output frequencies

fPWM1

200

2200

configurable

Resolution

bit

Data duty cycle range

DCdata

configurable, the 12bit angle

value is mapped to this duty

cycle range

Diagnostic duty cycle, low1)

1) Care has to be taken to ensure that there is no overlap of diagnostic duty cycle and data duty cycle range

DCdiag,low

configurable, fault indication

Diagnostic duty cycle, high1) DCdiag,high

100

configurable, BIST error

indication or reset indication

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