LMP91051 registers problem

Ruben Rodrigues50

Prodigy 25 points

Other Parts Discussed in Thread: LMP91051

Hi,

I have a problem with LMP91051 AFE. If i don't send SPI commands, CMOUT pin don't have 1.15V. If i send 0x40 to

Device Configuration Register (Address 0x0), i have 1.15v. But this values don't corresponds to datasheet.

Someone with the same problem or can help me?

Thanks

Ruben

over 11 years ago

0 domenyko over 11 years ago

TI__Genius 9655 points

Hi Ruben,

after the power on the Analog blocks of the LMP91051 are OFF.

After power on the data of the Device Configuration Register (Address 0x0) is 0x0, it means that PGA1 and PGA2 are off. Since their output is referred to CMOUT, also the Common mode generator block is OFF.

The Common mode generator block is enabled when at least one PGA is ON.

regards,

Domenico

0 Ruben Rodrigues50 over 11 years ago in reply to domenyko

Prodigy 25 points

Hi,

thanks for your answer. I think the datasheet should have written it .

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LMP91051 registers problem