For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824

978-250-3343 tel • 978-250-3373 fax • Order On-line at www.hittite.com

Application Support: apps@hittite.com

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HMC700LP4 / 700LP4E

v11.0411

8 GHz 16-Bit Fractional-N PLL

Table 16. Reg 09h CP Register

Bit

name

Width

Default

Description

[1:0]

reserved set them to 0

2

0

[4:2]

cp_UPoffset_sel

3

0

charge Pump UP offset control 55ua/step

000 = 0ua

001 = 55ua

010 = 110ua

...

111 = 385ua

[6:5]

reserved Set them to 0

2

0

[9:7]

cp_Dnoffset_sel

3

0

charge Pump Dn offset control 55ua/step

000 = 0ua

001 = 55ua

010 = 110ua

...

111 = 385ua

[13:10]

cfg cp_UPtrim_sel

4

0

charge Pump UP current trim 7ua/step

0000 = 0ua

0001 = 7ua

0010 = 14ua

0100 = 28ua

1000 = 56ua

1111 = 105ua

[17:14]

cp_Dntrim_sel

4

0

charge Pump Dn current trim 7ua/step

0000 = 0ua

0001 = 7ua

0010 = 14ua

0100 = 28ua

1000 = 56ua

1111 = 105ua

[20:18]

cp_UPcurrent_sel

3

0

charge Pump UP Main current control 500ua step

000 tristate if PFD also disabled

001 500ua

010 1000ua

011 1500ua

100 2000ua

101 2000ua

110 2000ua

111 2000ua

[23:21]

cp_Dncurrent_sel

3

0

charge Pump UP Main current control 500ua step

000 tristate if PFD also disabled

001 500ua

010 1000ua

011 1500ua

100 2000ua

101 2000ua

110 2000ua

111 2000ua

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