HI Sir
I Design a battery tester which old design is ISO7240,
new design , i use the ISO7760F , but some data error happen in test
Can you indicate the diff ? thanks
Hi Alex,
Sure, we'll be happy to help you out here. Do you have a simplified block diagram or schematic and setup details to share to help us debug this?
The 7240M DW is an older generation, but high-speed and low latency 4 channel digital isolator. The M device uses CMOS thresholds and can run upto 150Mbps.
The ISO7760 is from a newer generation family, 6 channels, and can do 100Mbps. Also uses CMOS thresholds, but some power consumption specs and timing specs are different. It is also uses a different signaling architecture internally [still using capacitive isolation].
I looked at the pinouts of the two devices in the package versions mentioned and there are some pinout differences for you to be aware of . Key is the ground pin placement and the presence of the enable pin on the 7240M, this is not there in the 7760 device.
Also, you are using the ISO7760F. The F version has failsafe low output. Meaning, when there is no input signal present, or when the input supply Vcc1 is not present, then the output will default to a logic low.. under this condition, If you want the output default to be high, then you can choose just the 7760/SSOP (without the F in the part number)
Best regards,
Abhi
