Part Number: INA149-EP
Tool/software:
Hi,
I am trying to use INA149 as a current sensor. I preferred INA149 for its high VCM capability. I want to use an unidirectional power supply, VCC= +5V. This is the model I am simulating with.
In the simulation, when I reduce the biasing to +5V to V+ and GND to V- with VREFA = +5V. VREFB = +5V (as suggested in the datasheet), the output saturates to 4V irrespective of the input.
Could you suggest me a proper INA149 circuit to be used for CS with unipolar 5V PS?
Part Number: INA149-EP
Tool/software:
Hello,
For the V62/12614-01XE:
- Which parameters are production tested?
- The first table below has only typical values for some parameters. I would like to know if there is a min or max value for gain, gain error and CMRR that could be provided?
- The second table has only typical values for some parameters too, also looking for min or max values for gain, gain error and CMRR.
Part Number: INA149-EP
Hello,
I found a PCN 20140409000, for Wire material and diam change on INA149AID and INA149AIDR.
I would like to know if this PCN is applicable on INA149AMDREP ? (even if not precised into this PCN)
Best Regards,
Areski ALI-BACHA
Part Number: INA149
Tool/software:
Hi,
Pleaes confirm if INA149 can support over current protection circuit for 24VAC system, thanks.
Part Number: INA149-EP
Hi,
Good day.
Our customer wants to know the details of what has been enhanced in the INA149-EP compared to INA149 aside from wider temperature range. This question arises because our customer noticed that it seems that INA149 has a better performance than INA149-EP based on datasheet. They are referring to the electrical characteristics at V+ = +15 V, V– = –15 V.
Please refer to the image below. The parameters being asked are the: CMRR, Gain error, Offset Voltage, and Temperature Range.
I appreciate your help on this matter.
Regards,
Cedrick
Part Number: INA149-EP
Distributors are out of stock of INA149A. There is a version with an exposed pad that otherwise appears to be an identical chip.
Can we purchase and populate the EP version without connecting the EP? We have no issues with thermal performance on the normal INA149A chip. The EP would be floating.
Part Number: INA149
Tool/software:
I received the INA149 simulation model from the web and ran it.
The offset voltage is listed as 350uV in the datasheet as a typical value.
The result is 50uV for the TINA model and 60uV for the PSpice model.
There is a big difference from the typical value of 350uV in the datasheet.
Please check.
Hi Erwan,
Apologies for the delay on this response. We were waiting for the design team feedback as this was an older design.
The INA149 is having issues with the output because the device is hitting a slew limit of the input common mode and is unable to properly reject the common mode signal and regulate the output. You should actually see some distortion effect at 150kHz as well but it is not as apparent on the output due to additional noise and the output scope shot is not zoomed in close enough.
Unfortunately, it may be difficult to use the INA149 in this specific use case as it cannot take the high frequency sinusoidal input common mode - at below 10kHz frequency, we expect the output to perform with little distortion. It is recommended to keep the input common mode signal below the 10kHz to keep the output from behaving this way.
Please let me know if you have any questions.
Thank you!
Regards,
Ashley
Part Number: INA149
Tool/software:
Hi,
I would like to use multiple INA149s to monitor the cell voltages of a 9S battery pack (3.35V - 4.45V/cell), by shifting the cell voltages down to a GND reference at the output.
I am only interested in measuring between 3.3V - 4.5V - if I am unable to get a linear output below a 3.3V input (like on an open-wire condition or deep self-discharge), as long as the INA149 won't be damaged, that's ok.
The supply voltage to each chip should be as low as possible to reduce standby current, preferably without negative voltages on the Vs- pin.
A 'sleep mode' would be great, where the INA149's Vs+ is removed, the differential output goes to 0V (with pulldowns if required), but the input and Vs- stays without damaging the INA149 device, to ensure excessive current won't be drawn from the battery.
What should I supply to Vs- and Vs+ for this application with adequate headroom, and do the features listed above sound safe, doable, and well within the operating limits of INA149?
Thank you.
Part Number: INA149-EP
The INA149-EP has an absolute max common mode rating of 500V for 10s. Can it take higher voltages for brief periods of time? Let's say 750V for 10ms? Assuming the 10s rating is a dissipation limit then shorter pulses could be possible. There is a similar question on this forum but it was never answered.