Is a replacement for the LOGDAC AD7111 ?

Hi Eddy,

I've moved your question on AD7111 to this community. Someone here will be able to attend on your query.

Regards.

Hi Eddy,

There are no other pin-to-pin compatible alternatives that are sharing the same internal decoding architecture (8-bit word internally decoded into a 17-bit word). If you only want pin compatibility, you might want to check the AD7524 .

Regards,

Mark

Hi msamera, Thanks.

My goal is to replace the component with the old 8 bits bus with a new DAC serial drived (I2C/SPI), but with the capability to set a dB attenuation, like the AD7111.

By other way, if I found a VGA amplifier that I can set the gain from 0 to 80dB, it is also ok for me.

Perhap, the solution is to find a 17bits DAC drived by a µcontroler, with a internal conversion table to make the steps of 0.375dB like the internal logic of the original component ?

Regards,

Hi Eddy,

Unfortunately, ADI has only two 17-bit DACs which are the AD7111 and the AD7112. The AD7112 is a dual version of the AD7111.

Regards,

Mark

Hi msamera, and what about the 18 bit AD5680 ?

I need to use it as a multiplier, with a reference signal near 5Khz.

I don't like the last stage that provide the 2 less bits. I think that the final filter could disturb my signal.

The documentation isn't very clear about the impact of this stage.

Have you an opinion ?