SP5524 Datasheet, PDF (7/10 Pages) Zarlink Semiconductor Inc – Bidirectional I2C Bus Controlled Synthesiser

SP5524
APPLICATION
A typical application is shown in Fig. 4. All input/output interface circuits are shown in Fig. 6.
15V
CONTROL
MICRO
39n
180n
18p
4MHz
SDA
I²C BUS _SCL
22k
1
16
SP5524S
P1
112V
AFC OUT
IF SECTION
8
9
130V
22k ^15V
2N3904
1n
1n
12k
P3 12k
P2 _12k
P0
IF SIGNAL
112V
0·1µ
10k
47k
10n
VT _{VARACTOR DRIVE}
22k
22k
22k
OSCILLATOR OUTPUT
TUNER
2N3906
2N3906
2N3906
BAND INPUTS
Fig. 4 Typical application
300
37·5
OPERATING
WINDOW
30
25
12·5
50 100
500
1000
FREQUENCY (MHz)
1300 1500
Fig. 5 Typical input sensitivity
6