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quiscent voltage as mention in my hall sensor

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vamsee

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i am just checking my hall sensor.. i connected my hall sensor to 9V battery via 5V voltage regulator.

in the datasheet it mention the quiscent voltage is 2.5V, that is without any magnetic field.. But when i noted down the readings using multimeter, it showing 0.71V.. I am bit confused whether i have made mistake??:roll:

pls help me out..

**broken link removed**

thanq
 

Double check the pin connections and measure all voltages at the sensor.
 

chuckey said:
With no load and 5V on the device with no mag field it should output ~2.5 V.
Frank
Click to expand...

ya! it shud show 2.5V, but it showing only 0.71 :???: wat might be the problem?

- - - Updated - - -

FvM said:
Double check the pin connections and measure all voltages at the sensor.
Click to expand...

i did!!! but still the same
 

So you say, you do measure 5 V between Vcc and Gnd terminal of the sensor, but only 0.7 V between output and Gnd?
 

FvM said:
So you say, you do measure 5 V between Vcc and Gnd terminal of the sensor, but only 0.7 V between output and Gnd?
Click to expand...

No, I measure 5V between output and gnd of 5v voltage regulator and 0.7V between output and gnd of hall sensor
 

so either --

1) your sensor is fried
2) you have actually not connected it correctly. Which package is it ? 3-pin SIP/ UA or SOT-23/ LH ?
3) there is actually a magnetic field present
 

kripacharya said:
so either --

1) your sensor is fried
2) you have actually not connected it correctly. Which package is it ? 3-pin SIP/ UA or SOT-23/ LH ?
3) there is actually a magnetic field present
Click to expand...

i am using 3 pin SOT ratiometric hall sensor **broken link removed**
 

vamsee said:
i am using 3 pin SOT ratiometric hall sensor **broken link removed**
Click to expand...

which one ?

also ... did you cross-check your pin numbers ?

sorry... thats all the help i can give. It's too simple to not figure it out by now.
 

kripacharya said:
which one ?

also ... did you cross-check your pin numbers ?

sorry... thats all the help i can give. It's too simple to not figure it out by now.
Click to expand...

Ok now i will tell u wat i have done... Without using any proto circuit board, i directly soldered the wires to the pins... i have taken the wires from the 9V battery and soldered to the 5V voltage regulator and then soldered to the hall sensor... is this might be the error???
 

HI all!!

I tried with new hall sensor of the same type and made connections.. but still it showing 0.7V when there is no magnetic field.. why i am not getting 2.5V??:???:
 

Since you are using the SOT23 package, with respect to fig. 3 of the data sheet you'll have pin 1 Vcc, pin 2 Vout and pin3 GND. The component in that figure is seen from above.
I'm not sure it can works properly with no-load; it's not clear to me what the datasheet means with "output load resistance = 4.7 kohm min.": it is the minimum required load ? Or, more probably, it is able to drive load as lower as 4.7 kohm ? However you can try with a 4.7 kohm resistor between Vout and GND.
Other possibility, but I don't think it is that, you burnt the device while soldering it.
 
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    vamsee

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I'm not sure it can works properly with no-load; it's not clear to me what the datasheet means with "output load resistance = 4.7 kohm min.": it is the minimum required load ? Or, more probably, it is able to drive load as lower as 4.7 kohm ? However you can try with a 4.7 kohm resistor between Vout and GND.
Click to expand...
The datasheet describes a push-pull output with limited source capability (about 1 mA). Thus 4.7k is meaned as minimal load resistor to ground, but the device will work with high impedance load.
 
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    vamsee

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i am soldering for the first time. will the hall output shows the output though i burnt the device?
 

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