25 Sep
2012
25 Sep
'12
6:41 a.m.
Alexander,
VCOREG is in fact on chip LDO which takes 3.3V and generates 1.8V for
VCOs supply. However, we do not recommend internal VCO 1.8V regulators
to be used as they are more noisy than the external ones. Hence, by
default internal regulators are powered down and bypassed so clean
external 1.8V can be supplied via the chip pins.
On 25/09/2012 05:19, Alexander Chemeris wrote:
Hi guys,
Could anyone tell me, the software guy, what may be the purpose of
VCOREG block in LMS6002D (Figure 3.4 at the Programming Guide)? In our
current code it's always powered down and not used, and I just wonder
whether it could be used for frequency hopping and what are other
potential uses. If I understand correctly, it's a kind of fine tuning
for the PLL output frequency.