ADL5513 noise <1kHz

Hello, I'm using the ADL5513 for a detector with low envelope bandwidth, around 0-100Hz. The ADL5513 datasheet only describes output noise density down to 1KHz. Do you have any data below 1KHz for estimating output noise? The plots show it decreasing at around 20dB/decade, but I'm assuming it must flatten out at some point...