HMC699LP5 / 699LP5E
v05.0110
7 GHz INTEGER N SYNTHESIZER
CONTINUOUS (N = 56 - 519), NON-CONTINUOUS (N = 16 - 54)
HMC699LP5(E) Programming
Tꢀe decimal value of A counter and s counter can be defined aꢁ:
N
A = int ( ) - 1
8
and
s = N - 8 (A + 1)
wꢀere N = 16 to 519
For a valid diviꢁion ratio N, tꢀe A counter and s counter muꢁt ꢁatiꢁfꢂ tꢀe condition: A +1 ≥ s
Tꢀerefore, N = 16 to 54 will reꢁult into non-continuouꢁ diviꢁion ratio
and N = 56 to 519 will be continuouꢁ diviꢁion ratio.
6
Example: Given a reference frequencꢂ, Fref = 11 Mhꢃ, and VCO output frequencꢂ, Fvco = (198 to 297) Mhꢃ, reꢁultꢁ
in N = 18 to 27. Tꢀe decimal value of A counter and s counter for N = 18 will be:
18
8
A = int (
) - 1 = 1
and
s = 18 - 8 (1 + 1) = 2
since tꢀe calculated value of A and s ꢁatiꢁfꢂ tꢀe condition of A + 1 ≥ s, tꢀe N = 18 iꢁ uꢁable diviꢁion ratio.
Tꢀe diviꢁion ratio, N = 23, ꢀowever, will reꢁult in A = 1 and s = 7. Under tꢀe condition A +1 ≥ s, tꢀe diviꢁion ratio N =
23 iꢁ not uꢁable.
In tꢀiꢁ example, tꢀe diviꢁion ratio, N = 19 to 23 cannot be programmed and tꢀerefore, tꢀe frequencꢂ range of 209 Mhꢃ
to 253 Mhꢃ cannot be uꢁed.
HMC699LP5(E) Programming Truth Table, Continuous Division Ratios
Diviꢁion
Ratio N
A Counter
Decimal set
swallow s
Decimal set
(LsB)
A0
(LsB)
s0
A1
1
1
1
1
1
1
1
1
1
1
1
1
A2
1
1
1
1
1
1
1
1
1
1
1
1
A3
0
0
0
0
0
0
0
0
0
0
0
0
A4
0
0
0
0
0
0
0
0
0
0
0
0
A5
0
0
0
0
0
0
0
0
0
0
0
0
s1
0
0
1
1
0
0
1
1
0
0
1
1
s2
0
0
0
0
1
1
1
1
0
0
0
0
56
57
58
59
60
61
62
63
64
65
66
67
6
6
6
6
6
6
6
6
7
7
7
7
0
1
2
3
4
5
6
7
0
1
2
3
0
0
0
0
0
0
0
0
1
1
1
1
0
1
0
1
0
0
0
1
0
1
0
1
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price, delivery, and to place orders: Analog Devices, Inc.,
resFpoonsribpilirtyiciseas,sdumeeldivbey ArynalaognDdevticoespfolraitcs euseo, nrodreforrsan:yHinfirtintigteemeMntsicofrpoawtenatsvoer oCtheor rporation, 20 Alpha Road, Chelmsford, MA 01824
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implicPahtioon noreo:th9er7w8ise-2un5d0er-a3n3y p4a3tent orFpaatexn:t r9ig7ht8s -o2f A5n0alo-g3D3e7vi3ces. Order On-line at www.hittite.com
Phone: 781-329-4700 • Order online at www.analog.com
6 - 7
Application Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are the property of their respective owners.
Application Support: Phone: 978-250-3343 or apps@hittite.com