1
Rev 013
13 Application Informati
13.1 Typical Three-Wire App i
13.3 Automotive and Harsh,
Three-Wire Circuit
14 Application Commen
For proper operation, a 100nF bypas
the V
DD
and ground pin.
For reverse voltage protection, it is re
When using a resistor, three points ar
- the resistor has to limit the r
- the resulting device supply
- the resistor has to withsta
When using a diode, a reverse curr n
Therefore, a 100/0.25W resistor for
Both solutions provide the required re
When a weak power supply is used r
recommended that figure 13.3 fr m h
The low-pass filter formed by R1 and
occurring on the device supply volt
Bipolar Hall Switch Very Hi
f 1
n
ation Circuit
13.2 Two-Wi e
oisy Environments
Note:
With this circuit,
currents can
two connecting w
The resistors RL
to bias the input
part specificati n
B
RP
: I
OFF
= I
R
B
OP
: I
ON
= I
OFF
capacitor should be placed as close as possible to
ommended to connect a resistor or a diode in seri
important:
verse current to 50mA maximum (V
CC
/ R1 d 50mA
oltage V
DD
has to be higher than V
DD
min (V
DD
= V
C
the power dissipated in reverse voltage condition (
cannot flow and the voltage drop is almost cons n
V application and a diode for higher supply voltag
erse voltage protection.
when the device is intended to be used in noisy en
Application Information section is used.
1 and the zener diode Z1 bypass the disturbances
V
DD
. The diode D1 provides additional reverse vol
1
gh Sensitivi
Mar/12
Circuit
recise ON and OFF
tected using only
res.
nd Rb can be used
urrent. Refer to the
for limiting values.
I
DD
= V
DD
/R
b
+ I
DD
I
OUT
= I
OFF
+ V
DD
/R
L
he device between
with the V
DD
pin.
R1.I
DD
)
2
D
= V
CC
/ R1)
(H0.7V).
are recommended.
ironment, it is
or voltage spikes
ge protection.
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