U4289BM Datasheet, PDF (8/10 Pages) List of Unclassifed Manufacturers – AM / FM - PLL

Figure 8. Application Circuit
6 to 15 V ^{110 Ω}
100 µF _{110 Ω}
16 V
27 pF
27 pF
4 MHz
16
15
14
13
3 kΩ
C₁*)
R₁*)
C₅*)
R₂*)
C₂*)
12
11
10
9
C₆*)
FMOSC
C₃
100 nF
U4289BM
1
2
3
4
5
6
7
8
100 µF
C₄
6.3 V
27Ω 12k Ω 12k Ω
1 nF
2.2 nF
AMOSC
100 nF
5V
*) Values depend on the step
frequency and used varicaps
Recommendations
for Applications
• C₃ = 100 nF should be very close to pin 1 (V_DD) and pin 16 (GND 1)
• GND2 (pin 7, analog ground) and GND1 (pin 16, digital around) must be connected
according to Figure 8
• 4 MHz crystal must be very close to pin 14 and pin 15
• Components of the charge pump (C₁/R₁ for AM and C₂/R₂ for FM) should be very
close to pin 11 with respect to pin 10.
Figure 9. PCB Layout
GND
C₁
C₂
16
15
14
13
12
11
10
9
8 U4289BM
C₄
V _DD
C₃
1
2
3
4
5
6
7
8
4757A–AUDR–10/03