L9177 datasheet(24/49 Pages) STMICROELECTRONICS

24 / 49 page

Electrical specifications

L9177

24/49

DocID17617 Rev 1

3.5.16

Variable reluctance sensor interface

Table 22. Variable reluctance sensor interface electrical characteristics

Symbol

Parameter

Condition

Min

Typ

Max

Unit

VHTH

Input high to low

differential

threshold voltage at

VRIN+ and VRIN-

nodes

-50

VCM

Common mode

operating range at

VRIN+ and VRIN-

1.5

Vcm_internal

Internal common

mode voltage

Switch off hysteresis current

0.27*VDD

0.3*VDD

0.33*VDD

Vdiagth_H(1)

Diagnostic high

threshold

Diagnostic voltage referred to

VRIN- (see Figure 14)

0.67*VDD

0.75*VDD

0.82*VDD

Vdiagth_L(1)

Diagnostic low

threshold

0.18*VDD

0.2*VDD

0.22*VDD

Idiag

Diagnostic current

Current from VRIN- when

diagnostic on

μA

Rinternal_

common

Internal common

mode resistor

Switch off hysteresis current

200

350

kΩ

IIB

Input bias current

VRIN+ = VRIN- = 1.5 V

μA

Ileak

Output leakage

VROUT = 5 V

μA

VCLPH

Input high clamping

voltage

VRIN+ = |VRIN-| = 20 mA

VCLPL

Input low clamping

voltage

VRIN+ = |VRIN-| = |20 mA|

-1.5

-0.3

tof

Output fall time

CLOAD = 20 pF, RLOAD = 5 kΩ

300

tof_1nf

Output fall time

CLOAD = 1nF

1.5

μs

VOUTL

Output buffer low

voltage

Isink = 2 mA

0.6

IOUTL

Output current

capability

Vout = 0.6 V

tprop

Propagation delay

VRS INM = 0.5 V, INP applied to

1 V to make VRS OUT

commuted

0.1

0.45

0.8

μs

1. if (VRIN- > Vdiagth_H) or (VRIN- < Vdiagth_L) then Fault is detected.

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