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HMC704LP4E
v03.1211
8 GHz fractionaL-n PLL
For price, delivery, and to place orders: Hittite Microwave Corporation,20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
table 22. reg 09h charge Pump register
BIT
TYPE
NAME
W
DEFLT
DEsCRIPTION
[6:0]
R/W
CP DN Gain
7
10d
Charge Pump DN Gain Control
20uA/step
Affects fractional phase noise and lock detect settings
0d = 0uA
1d = 20uA
2d = 40uA
...
127d = 2.54mA
[13:7]
R/W
CP UP Gain
7
10d
Charge Pump UP Gain Control
20uA/step
Affects fractional phase noise and lock detect settings
0d = 0uA
1d = 20uA
2d = 40uA
...
127d = 2.54mA
[20:14]
R/W
Offset Current
7
0
Charge Pump Offset Control
5uA/step
Affects fractional phase noise and spursand lock detect settings
0d = 0uA
1d = 5uA
2d = 110uA
...
127d = 635uA
[21]
R/W
Offset Current UP
1
0
1 - sets Direction of Reg[20:14] Up, 0- UP Offset Off
[22]
R/W
Offset Current DN
1
1 - sets Direction of Reg[20:14] Down, 0- DN Offset Off
[23]
R/W
HiK charge pump Mode
1
0
Hi Kcp Charge Pump - Very Low Noise, Narrow Compliance range,
requires Opamp
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