AK1599V Datasheet, PDF (22/41 Pages) Asahi Kasei Microsystems – RF Transmitter for Satellite Communication

< Address0x02: Freq2 >
D[18:16]
CP1[2:0]: Settings of the charge pump current for normal mode
D[14:12]
CP2[2:0]: Settings of the charge pump current for fast lock up mode
It is possible to set two types of charge pump current, CP1 and CP2.
CP1 is the charge pump current setting for the normal mode.
CP2 is the charge pump current setting for the fast lock up mode.
Charge pump current is as follows.
CP1[2:0], CP2[2:0]
0
1
2
3
4
5
6
7
Charge pump current [ typ. μA ]
300
600
900
1200
1500
1800
2100
2400
R = 27k
R: Resistor value which is connected to CPBIAS pin
[AK1599V]
D[11:0]
FRAC[11:0]: Fractional Numerator determination
Set the Numerator of Fractional divider.
The allowed range is from 0 to MOD[11:0].
When FRAC is set to 0, ΔΣ modulator is inactivated and synthesizer operates as Integer-N
synthesizer.
015006835-E-00
- 22 -
2015/5