GP2015
Vcc
VALUES FOR L1,L2,L3,L4 & L5 ARE
DEPENDENT ON FILTERS USED
L1
L2
L3
L4
RF INPUT
MATCHING
175MHz
FILTER
SAW
FILTER
Vcc
Cs = 12pF
Cp = 2.7pF
L5
Creg = 0.1uF
(Vcc = +5.0V only)
Cs
37 38
40 41
44 45
47 48
RF
32
4, 6
INPUT
Cp
33, 34,
30,31
REF2
10MHz I/P
27
2
GP2015 FRONT-END
48 PIN
23
C1
Cagc
PLL LOOP
=0.1uF
FILTER
R1
24
3
C1 = 0.47uF
R1 = 270Ω
C2 = 10nF
17
16
11
15
14
21
9
8
20
C2
Vcc
R4
R5
R6
R2
POWER-ON REF
R4, R5 = 470Ω
R6 = 1.5kΩ
R3
70
71
73
76
77
66
2
POWER-ON
REF
LADDER
R3 =2.7k
R2 = 2.7k (Vcc = +3.0V)
= 6.8k (Vcc = +5.0V)
GP2021 CORRELATOR
80 PIN
Figure 4 - GP2015 typical application
Ref 2
(27)
GP2015
33pF
22pF
10.000MHz
CRYSTAL
(28)
Ref 1
Figure 5 - Crystal Reference connections
10
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