FHS-40-P-SP600 Datasheet, PDF (7/18 Pages) LEM – Current transducer FHS 40-P/SP600

FHS 40-P/SP600
0 - 100A
Typical connection diagram and ground plane
Values of the electrical data given page 3 are according to the following connection diagram.
isolation
barrier
+5V
I_P
Primary
conductor
•
C₃
5, 6
4
0V
VC
VOUT ²
• _C2
VOUTFast
8
V_S
VREF ¹
• _C1
V_SFast
STANDBY _{0 V}
7
3
V_STANDBY
Figure 6: Typical connection diagram (C₁ = C₃ = 47 nF, C₂ = 4.7 nF)
Careful design of the PCB is needed to ensure minimum disturbance by surrounding currents and external fields.
C₁ to C₃ should be mounted as close as possible to the pins.
The maximum capacitor value allowed on V_OUT is 18 nF. It is recommended to use 4.7 nF.
The maximum capacitor value allowed on V_OUTFast is 330 pF.
A positive output voltage V_S is obtained with a current (I_P) flowing under Minisens from the pin 4/5 end of the package to the pin
1/8 end. V_SFast is negative when V_S is positive.
If the pin V_OUTFast is not used, it should be connected only to a small solder pad. Coupling to other tracks should be minimized.
An internally generated reference voltage of 2.5 V with a source resistance of 200 W is available on the pin V_REF. The voltage
on this pin may be forced externally with a voltage in the range 1.5 - 2.8 V. The output voltage V_S is limited to approximately the
value of V_REF in both positive and negative polarities.
V_STANDBY should be connected to a low impedance so that capacitive coupling from adjacent tracks does not disturb it (there is an
internal pull-down whose resistance is 500 kW). It should be connected to 0 V if not used.
Connect V_STANDBY to the same voltage as V_C to activate the Standby mode. V_REF should not be forced in Standby mode.
Minisens can be directly mounted above the PCB track in which the current to be measured flows (see kit 4, for example).
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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
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