AK1548 Datasheet, PDF (37/42 Pages) Asahi Kasei Microsystems – 8GHz Low Noise Integer-N Frequency Synthesizer

[AK1548]
VDD1,VDD2
PDN
LDO
0V
10ms
Register value defined
Register Writing
Address2 Address0 Address1
{PD1}=1 Setting Setting
Address2
{PD1}=0
CP
Hi-Z
undefined
1.9V
{PD1}=0 write in
Output
Power-Up Sequence (VDD1/VDD2/PDN simultaneous power-up)
Note)
After powers on, the initial setting of registers is undefined. It is required to write in Address0,
1 and 2 to settle them. It takes about10ms from PDN rise-up to LDO rise-up. The power-up
by register ({PD1}=0 write in) should be done after LDO rise-up.
MS1364-E-00
37
2012/1