Magnetic
Field
Sensors
FEATURES
•ZMZ20/30 (E-Line 4-Pin) and ZMY20/30 (SOT-223-S) are extremely sensitive magnetic
sensors employing the magneto-resistive effect of thin film permalloy
•Packages : E-Line 4-Pin and SOT-223-S
•Output voltage proportional to the magnetic field Hy
•Adjustment of sensitivity and suppression of the hysteresis by the auxiliary magnetic field
Hx
•Magnetic fields vertical to the chip level are not effective
ABSOLUTE MAXIMUM RATINGS
Parameter Symbol Unit
Supply voltage ZMY20/ZMZ20 VB12 V
Supply voltage ZMY30/ZMZ30 VB15 V
Total power dissipation Ptot 120 mW
Operating temperature range Tamb -40 to +150 °C
Storage temperature range Tstg -65 to +150 °C
package : SOT223S (4-Pin)
1: +VO 2: -VO 3: +VB 4: -VB
VO - output voltage VB - supply voltage
ZMY20, ZMZ20
ZMY30, ZMZ30
package : E-Line (4-Pin)
1: +VO 2: -VB 3: -VO 4: +VB
VO - output voltage VB - supply voltage
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ZMY20/30, ZMZ 20/30
ELECTRICAL CHARACTERISTICS (at Tamb = 25 °C and Hx = 3 kA/m unless otherwise stated)
Parameter Symbol Min. Typ. Max. Unit Test conditions
Bridge resistance
ZMY20/ZMZ20
ZMY30/ZMZ30
Rbr 1.2
2.0 1.7
3.0 2.2
4.0
kΩ
Output voltage range
ZMY20/ZMZ20
ZMY30/ZMZ30
VO/VB 16
12 20
16 24
20
mV/V
Open circuit sensitivity
ZMY20/ZMZ20
ZMY30/ZMZ30
S3.7
2.0 4.7
3.0 5.7
4.0
(mV/V)/(kA/m) no disturbing
field Hd allowed
Hysteresis of output voltage VOH/VB--50 µV/V Hy ≤ 2 kA/m
Offset voltage Voff/VB-1.0 - +1.0 mV/V
Operating frequency fmax 0 - 1 MHz
Temperature coefficient of
offset voltage TCVoff -3 - +3 (µV/V)/K Tamb =
-25...+125°C
Temperature coefficient of
bridge resistance TCRbr -0.3- %/K T
amb =
-25...+125°C
Temperature coefficient of
open circuit sensitivity
VB = 5 V
TCSV--0.4- %/K T
amb =
-25...+125°C
Temperature coefficient of
open circuit sensitivity
I B = 3 mA
TCSI- -0.1 - %/K Tamb =
-25...+125°C
Devices are identified by a code on the body of the device
Ordering information:
ZMY20/ZMZ20 ..... M20 ZMY30/ZMZ30 ..... M30
ZMY20TA ..... 7" reel 1,000 components per reel
ZMY20TC ..... 13" reel 4,000 components per reel
ZMY30TA ..... 7" reel 1,000 components per reel
ZMY30TC ..... 13" reel 4,000 components per reel
ZMZ20 ........... bulk in box (2,000 components per box)
ZMZ30 ........... bulk in box (2,000 components per box)
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ZMY20/30, ZMZ 20/30
Application 1 (digital output)
Applica tio n 2 (analogue output)
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ZMY20/30, ZMZ 20/30
The sensor has to be reset after leaving the safe operating area by an auxiliary field of HX = 3 kA/m.
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ZMY20/30, ZMZ 20/30
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ZMY20/30, ZMZ 20/30
In applications with HX < 3 kA/m, the sensor has to be reset by an auxiliary field of HX ≥ 3 kA/m before
use.
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ZMY20/30, ZMZ 20/30
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