Dear all.
I am planning use above IC for current measuring application. Please let me know what is max voltage given @ ip+ & ip- terminal.
It said that current can be measured upto 5A
Also if any one tried this let me know output type. whether it is 0~5v analog output or 4~20ma current output. I am confused in these two section.
From the datasheet it is apparent that The output voltage is Vcc/2 for I=0.
The parameter indicating this is Zero Current Output Voltage VIOUT(Q) B in the table
COMMON OPERATING CHARACTERISTICS on page 4.
This is necessary since the chip does bidirectional measuring. The actual output voltage depends on the sensitvity which for the x05b is 185mV/A
This means that if you have a current of for example 2,2A the sensitivity calculation gives a voltage of 2,2*0,185=0,407V.
My question Here is can i give 24 v supply.
Please mention max voltage can applied @ IP+ and IP-.
supply voltage to IC or given @ terminal ip+ and ip- module shown
SO as per you it is analog 0~5v output Need to calibrate it depend on sensitivity
Since the input terminals (2 of them) are current terminals, there is no need (within limits) to concern yourself with the measured current supply voltage. The rated input limit Viso is 184, 354, 1500 or 2100, depending upon which standard of test you wish to consider.
The supply voltage Vcc (5 to 8 volts) is the voltage applied to the output side of the device and is used to drive the isolated DC output.
The maximum supply voltage is stated as the first point in the table "Absolute Maximum Ratings" on page2 (it usually is). The isolation voltage between measuring pins and the rest of the circuit is 1500V.
I seems to me that you are not quite familiar with the concept of current measurement. In current measurement the metering device is connected in series between the supply and the load. Failing to do so will result in a short circuit and possible accidents. (think of this when using a multimeter)
If your planning to measure small currents under 100mA then I suggest either buying this or look at the schematic and build the circuit without the ACS712 and connect it to the ACS712 module you already have.
I have made a few of these "add-on" circuits to use with ACS712 5A modules, I can accurately measure from 60mA(lowest I need to) to 4+A which I couldn't without the op-amp circuit.
ACS71x series are hall-effect current sensors - their outputs are isolated from the
current-carrying terminals, which is good, but they are noisy, much more noisy than
shunt-current sensors, due to the need to ampify small hall-plate voltages.
They do have very low series resistance though, as they consist of a strip of copper
which runs close to a hall-sensor, all moulded into epoxy which provides the isolation.
They are very good at surviving high overload currents that would melt a shunt sensor,
according to the datasheet.
These devices are 5V powered with ratiometric voltage output (some tolerate a 3.3V supply,
some don't, check the datasheet)
They have bigger cousins, ACS756 and ACS758, which are in a package where the
current carrying terminals are thick strips of copper, rated to 200A IIRC.