HKZ121 View Datasheet(PDF) - Siemens AG
Part Name
Description
Manufacturer
HKZ121 Datasheet PDF : 7 Pages
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HKZ 121
Characteristics
VS = 5 V to 18 V, TA = – 30 to 130 ˚C
Parameter
Symbol Limit Values
min. max.
Output saturation
voltage
VQ sat
–
–
–
0.4
0.6
Output reverse current
Supply current
IQ R
–
10
IS
–
12
Fall time
tHL
–
1
Overvoltage protection
– Supply voltage (VS)
– Output (VQ)
VSZ
32
42
VS0
32
42
Unit Test Condition
–
without vane
–
IQ = 40 mA
V
TA = – 30 to 110 ˚C
V
TA = 110 to 130 ˚C
µA with vane
mA without vane
µs
IQ = 40 mA
V
IS = 16 mA
V
IS = 16 mA
Switching Point Characteristics
Definitions
In most applications, the switching point is set exactly by mechanical adjustment, thus
compensating all mechanical tolerances in the system including the scatter of the Hall-effect
vane switch. For the function of the device in operation, only the deviations of those
characteristics are important on temperature and operating voltage.
The characteristic values of the switching points are, therefore, not directly referred to the
mechanical dimensions of the vane switch, but to an electrically defined symmetry B0
according to formula 1):
1) B0 = (ON left + OFF left + ON right + OFF right): 4
B0 = A0 ± 0.3 mm
The definition of the operate and release points is shown the following figure.
Operate point fON is obtained by subtracting the measured ON operate value from the reference
point B0:
2) f ON = ON right – B0 = B0 – ON left
The release point fOFF is calculated from the difference between the appropriate ON and OFF
points:
3) f OFF = ON right – OFF right = OFF left – ON left
fON 0 and fOFF 0 are the switching points measured for the individual component under normal
conditions (VS = 12 V, TA = 25 ˚C) within the characteristic device deviation.
The deviations of the operate and release points are defined according to 4):
4) ∆f ON = f ON – f ON 0
∆f OFF = f OFF – f OFF 0
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