I want to use ISO7341CQDWRQ1. In the data sheet, I only know the VI value under AC characteristics;
However, the VI value under DC characteristics is not found. For example, when ISO7341C-Q1 does not transmit data, the input state of the chip is often low / high, and what is the current consumption value.
Hi Meng,
Thank you for posting to E2E!
I apologize for the confusion, but supply current consumption for DC input voltages are specified for ISO7341-Q1, as shown below:
These DC current consumption values are the same regardless of the ISO7341's input state and default output because, unlike ISO7741, this device uses edge-based transmission across the isolation barrier instead of on-off modulation. For both DC input cases, data is continuously transmitted.
Is it possible for you to use the ISO7741-Q1 instead of ISO7341-Q1? This is our most robust device for most applications and exceeds many performance abilities of ISO7341-Q1. If automotive (Q1) rating is not critical, the ISO7041 also offers significantly lower current consumption specs.
Please let me know if this is helpful.
Thank you,
Manuel Chavez
The data sheet of the competitor SI8641ED-AS2 (Silicon labs) indicates the VI values under two test conditions.
Hi Meng,
ISO7341-Q1 specifications include both DC VI conditions in the parameter I showed above. Current consumption is the same in both DC VI conditions for this device.
Since Si8641 has a different method to transmit data across the device's isolation barrier, current consumption varies based on the DC input state. This is not the same as ISO7341-Q1.
If you are looking for a device which has an internal architecture like Si8641, ISO7741-Q1 is specified as shown below:
Thank you,
Manuel Chavez
