HMC704LP4E Datasheet, PDF (41/44 Pages) Hittite Microwave Corporation – 8 GHz fractionaL-N PLL

v04.0215
HMC704LP4E
8 GHZ FRACTIONAL-N PLL
Table 22. Reg 09h Charge Pump Register
BIT
TYPE
NAME
W
DEFLT
[6:0]
R/W
CP DN Gain
7
10d
[13:7]
R/W
CP UP Gain
7
10d
[20:14]
R/W
Offset Current
7
0
[21]
R/W
[22]
R/W
Offset Current UP
Offset Current DN
1
0
1
1
[23]
R/W
HiK charge pump Mode
1
0
DESCRIPTION
Charge Pump DN Gain Control 20uA/step
Affects fractional phase noise and lock detect settings
0d = 0uA
1d = 20uA
2d = 40uA
...
127d = 2.54mA
Charge Pump UP Gain Control 20uA/step
Affects fractional phase noise and lock detect settings
0d = 0uA
1d = 20uA
2d = 40uA
...
127d = 2.54mA
Charge Pump Offset Control 5uA/step
Affects fractional phase noise and spurs and lock detect settings
0d = 0uA
1d = 5uA
2d = 110uA
...
127d = 635uA
1 - Sets Direction of Reg[20:14] Up, 0- UP Offset Off
1 - Sets Direction of Reg[20:14] Down, 0- DN Offset Off
Hi Kcp Charge Pump - Very Low Noise, Narrow Compliance range,
requires Opamp
Table 23. Reg 0Ah AuxSPI Trigger Register
BIT
TYPE
NAME
W DEFLT
[23:0]
R/W
Reserved
24 2205h
Program 1800h
DESCRIPTION
5 - 41
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