SP5611 Datasheet, PDF (8/12 Pages) Mitel Networks Corporation – 1·3GHz Bidirectional I2C Bus Controlled Synthesiser

SP5611
j1
j 0.5
j2
j 0.2
j5
0
0.2
0.5
1
2
5
1·25GHz
2j 5
2j 0.2
S11:ZO = 50Ω
2j 0.5
NORMALISED TO 50Ω
2j 1
2j 2
FREQUENCY MARKER STEP = 250MHz
Fig. 7 Typical input impedance,
APPLICATION NOTES
An application note, AN168, is available for designing with
synthesisers such as the SP5611. It covers aspects such as loop
filter design, decoupling and I²C bus radiation problems.
The application note is published in the Mitel Semiconductor
Media IC Handbook. A generic test/demonstration board has
been produced, which can be used for the SP5611. A circuit
diagram and layout for the board are shown in Figs. 8 and 9.
The board can be used for the following purposes:
(A) Measuring RF sensitivity perfomance
(B) Indicating port function
(C) Synthesising a voltage controlled oscillator
(D)Testing external reference sources
The programming codes relevant to these tests are given in
Table 6.
15V
R11 3k
S1
S2
EXTERNAL
REFERENCE
SK2
C6 10n
(NOT FITTED,
SEE NOTE)
C2
220n
C3 47n
R7 22k
15V
P2
130V
112V
C7
C8
C9
100n
100n 100n
R8 22k
R9 10k
R10 47k
R12 1k
TP1
DATA/SDA
CLOCK/SCL
X1 C1
4MHz 18p
C12 100p
C13 100p
1
16
2
15
3
14
4
13
SP5611
5
12
6
11
7
10
8
9
TR1
2N3904
C14 10n
C5 1n
C4 1n _15V
R14 22k
112V
C10 1n
R13 12k
TR2
2N3906
ENABLE/ADDRESS SEL
P1
P4
NOTE
To use an external reference,
capacitor C6 must be fitted
and capacitor C1 removed
from the board.
D1
PIN NO. 6
D2
7
D3
8
D4
9
D5
10
D6
11
112V
C11
1n
P3
VAR
GND
SK1
RF INPUT
Fig. 8 Test board circuit
8