Hi Teritama,
As you noticed, we do not specify the RMS noise on the datasheet. If you need an accurate RMS noise, the REF5040 TINA-TI reference design in the link below will show you an accurate simulation of noise. You can use the simulation to your specific system condition and simulate the noise.
Use: Analysis > Noise in TINA-TI
-Marcoo
Hi Marcoo,
Thank you early reply.
I tried simulation at TINA-TI with reference design on the link.
I show this result of Noise analysis bellow.
On this graph we can see there is peak around 37kHz.
I thought the result would be as shown below.
I want to know if this result is characteristic of device or indicates that filter is required.
If filter is required please teach recommended value.
Best regards.
teritama
Hi Teritama,
That peak is due to the output cap and cap on the trim pin.
See the following E2E for graphs on noise based on changing the output cap value. I would not worry about creating a filter based on the peak from the output capacitor. This peak from output capacitor is applicable to all output load caps on all devices not just the REF50xx family.
-Marcoo
