#### digitalcat

##### Newbie level 5

Hello everybody,

I wanted to show you an isolated battery voltage measurement system that I am designing for a client.

the circuit is based on tlp7820 isoamp and ltc2344 adc.

tlp7820 has an optimal dynamic range of 300mV, so I use a voltage divider to convert 30Vdc (max) to 300mV ...

Tlp7820 also has a fixed gain of 8.2 and the 30Vdc input output is about 2.5vdc ...

I use a ltc2344 adc which has a differential input so it can be used connected directly to the output of the TLP7820,

ltc2344 can be configured with internal or external reference voltage, for an input range of 0-2.5vdc,

so every analog range seems to match.

I think it should work as I checked from the IC reference designs, I tried to put everything together as I wrote previously, i've never used this ic's and this kind of analog measurement, so I hope you can help me and confirm that I am not doing something. wrong..

Below are schematics of analog isolated frontends with inputs from batteries, and adc input from analog fronteds..

There are a total of 12 inputs, 3 x adc Lt2344, with 4 inputs each one..

Thanks

I wanted to show you an isolated battery voltage measurement system that I am designing for a client.

the circuit is based on tlp7820 isoamp and ltc2344 adc.

tlp7820 has an optimal dynamic range of 300mV, so I use a voltage divider to convert 30Vdc (max) to 300mV ...

Tlp7820 also has a fixed gain of 8.2 and the 30Vdc input output is about 2.5vdc ...

I use a ltc2344 adc which has a differential input so it can be used connected directly to the output of the TLP7820,

ltc2344 can be configured with internal or external reference voltage, for an input range of 0-2.5vdc,

so every analog range seems to match.

I think it should work as I checked from the IC reference designs, I tried to put everything together as I wrote previously, i've never used this ic's and this kind of analog measurement, so I hope you can help me and confirm that I am not doing something. wrong..

Below are schematics of analog isolated frontends with inputs from batteries, and adc input from analog fronteds..

There are a total of 12 inputs, 3 x adc Lt2344, with 4 inputs each one..

Thanks