Current Sensor

Under voltage level in MCR1101-50-5

Hitenpatel — Tue, 31 Dec 2024 09:53:01 GMT

We are using MCR1101-50-5 current sensor. It stats to give output when VCC reaches at 2 Volt. So, what is level of under voltage level in MCR1101-50-5?

If I connect 22 nF capacitor on Vcap pins instead of 10 nF. Output is delayed. What is maximum value of capacitor I can connect at Vcap pin?

ROS Driver: NoneType data

caro — Wed, 07 Jun 2023 21:17:15 GMT

Hi, I hope that I am at the right place. I am currently trying to log data from the IMU OpenIMU300ZI using the ROS driver from ROS-Aceinna /
ros_openimu.
The connection is working fine, as the IMU is recognized but the data that I receive is empty, meaning that it is of NoneType. This results in the ROS node to stop.
Is there any config file or similar that I need to set (such as the rate or similar) before running the ros node?
Thanks in advance.

MCR1101-20-3 Unused Pin

talhadudak — Sat, 21 Jan 2023 13:20:53 GMT

Hi,

I do not want to use OCD function of the current sensor. For this situation, what should I do the VOC and FAULTB pins ? Can I leave as float these pins ?

Terminal finish on the MCA1101-5-5

wmackin — Mon, 14 Nov 2022 14:12:00 GMT

Due to the risk of tin-whisker growth, we need some information about the pure-tin plating applied to the leads of the MCA1101-5-5:

Pb content - What is the percentage by weight of lead (Pb) that is present as an alloying
element with the tin finish?
<0.2
0.2-1.0
1.1-2.0
2.1-2.9
What is the final finish after deposition?
Bright
Matte
What is the thickness of the tin deposit in micro-inches?
<50 (< 0.000 050")
50-250
251-500
501-1000

1000

What material is directly under the tin?
Brass/Bronze
Copper
Low-expansion alloy
Nickel
Other __________________
What is the substrate that controls the Coefficient of Thermal Expansion?
Ceramic
Low-Expansion Alloy
Copper or Aluminum
Ferrous
Other _________________
Is the plating treated after deposition?
Annealed
Fused
No heating after deposition

This data helps us assess and quantify the risk of tin whisker growth from the terminals
of the part. Thank you for your help with this!

MCR1101-5-3 Sensitivity

terryz — Fri, 08 Apr 2022 18:33:02 GMT

HI, I am looking to measure small currents ~ 25.0mA at 24 VAC AND 60mA @ 24VDC on the same circuit (the load can be AC or DC, we need to handle both. To make a fail determination on the load, I am looking to discern if there is a +/- 50% variation in the nominal currents indicated above. Is this a practical application with this part? We would be averaging multiple samples to average out transient and common noise.

MCR1101-50-5 Adjacent conductor Sensitivity

donowilk — Fri, 11 Feb 2022 19:34:33 GMT

For currents flowing under the sensor, it's assumed that there are primary areas of sensitivity. Considering the isolation barrier across the large SOIC-16 package, please define what regions that must be avoided underneath the device due to the magnetic field sensitivity. The figure showing the ACEINNA package has a crude set of quadrants defined. Please indicated which of these quadrants should be avoided, or perhaps include a drawing that defines the sensitive area. Thanks!

Lifetime drift?

webtux — Fri, 20 Aug 2021 08:47:35 GMT

Hello,
I have a question regarding the lifetime drift of the sensor MCR1101-5-3. As stated in the datasheet the has a lifetime drift of +-300mA max. There is a footnote saying something about the statistics and lots taking into account. For me it is not clear if this information is for calibrated devices or in case of no calibration. So if I calibrate each sensor and leave if for 10 years+ in operation can there be a drift of +-300mA under worst case conditions over its lifetime? That would indeed be a lot...

Thank you!

MCA 1101_50_3 Vout Overmodulation

anyllo — Tue, 17 Aug 2021 03:20:53 GMT

This chip is used for PFC circuit (totem pole) open-loop test. The Iac current is measured through the digital-to-analog signal board (ch2). It can be found that the signal is overmodulated, but the rated current is only 3A (ch4).
Image URL: https://upload.cc/i1/2021/08/17/b3shnM.jpg

MCA1101-50-3 EOL information

Elbert — Wed, 23 Jun 2021 00:55:00 GMT

I need product EOL ( End of Life ) information.

I have the OpenIMU300RI I need to connect to a PLC s-1200

yol — Fri, 30 Apr 2021 14:47:47 GMT

hello ACEINNA people, I have the OpenIMU300RI and I need to connect to a s7-1200 PLC through the RS232 module of the PLC, I made the connection but the data it shows is not as it says in https://openimu.readthedocs.io/en/latest/software/UARTmessaging.html I have tried with different transmission speeds such as 38400, 57600, 115200, but it does not work, it is supposed to send the 0x5555 data as header but it does not work

so I need to know the following:

the communication of the OpenIMU300RI at how many baud is configured by default?.

2.-I DO NOT HAVE THE ST-LINK J-TAG EVALUATION KIT, my question is how can I configure the transmission speed (baud)?
Thank you

MCR1101-50-5 current sensor overcurrent

anyllo — Tue, 22 Dec 2020 04:28:31 GMT

1.The overcurrent function is detect Positive/negative IP or only Positive.
2.MCR1101-50's OVERCURRENT DETECTION (OCD) is fixed value(50A*1.2) or Adjustable. ex: setting OVERCURRENT DETECTION (OCD) is 30A.

MCR1101-50-5 max pulse current

kanuli — Thu, 09 Jul 2020 10:54:18 GMT

Hi, I think that depends on the pulse, duration and frequency. With many such sensors, it is a question of di to dt and the resistance of the primary conductor. Finally, simply a question of heat development within the housing. In such designs, an appropriate copper surface for cooling at the primary contacts is usually very important. Thermal vias are also very helpful in transferring the heat generated over several layers to the environment via the board. I think this can also be seen in the demo board design. How big and how long is the current pulse and how often? How many amperes should be measured permanently? The data sheet says for the 50A version 100A max. without footnote. So it could be assumed that it is continuous.
greets

Output impedance MCA1101 Vout and Vref

MaartenL — Tue, 05 May 2020 08:53:22 GMT

I'm working on a design using the MCA1101. I am currently planning to use a instrumentation amplifier for offset and gain correction. To improve common mode rejection, we want to match the impedance between Vout and Vref from the MCA to the inputs of the inamp. Can you please inform me of the output impedance of these terminals on the MCA1101 series?

MCR1101-50-5 current sensor overcurrent

ZhengweiHuang — Tue, 24 Mar 2020 02:50:06 GMT

Hi @tivanis

No fault_b won’t be reset after power cycle. The effective way to reset the pin state is to apply Vdd voltage to VOC pin, 5.0V in this case. Both VOUT and VREF still works properly even the over current event happened. Your propose to wired multiple VOC pins simultaneously is doable, the input end of VOC is actually a ADC which will set the over current threshold depending on the input voltage. So wired VOC net among multiple parts together and supplied by one voltage source is fine. The other thing might be useful for you is the falut_b pins can be also connected together because it’s open-drain output type in this way you can implement OR function for over current detection application
Hope this helps,

MCR1101-50-5 current sensor

Mike Horton — Mon, 17 Feb 2020 18:03:19 GMT

Since you are not using Overcurrent protection functionality nor the fault flag, you can leave the FaultB and VOC pin OPEN.

The output step response of the device on Vout is 300nS