GP2010 Datasheet, PDF (10/24 Pages) Mitel Networks Corporation – GPS Receiver RF Front End

GP2010
VALUES FOR L1 AND L2 ARE
DEPENDENT ON FILTER USED
L1
L2
Vcc
L3,4 = 560nH
L3
L4 ^{L5 = 2.2uH}
RF INPUT
MATCHING
Cs = 4.7pF
Cp = 1.5pF
RF
INPUT
Cs
Cp
Cagc
=0.1uF
R4, R5 = 470Ω
R6 = 1.5kΩ
175MHz
FILTER
33 34
29
36 37
DW9255
SAW
L5
FILTER
40 41
43 44
4, 6
Vcc
Creg = 0.1uF
(Vcc = +5.0V only)
27,28,
30,31
21
GP2010 FRONT-END
44 PIN
22
15 14 11 13 12 19
9
R4 R5 R6
24
REF2
10MHz I/P
2
3
8
18
C1
R1
PLL LOOP
FILTER
C1 = 0.47uF
R1 = 270Ω
C2 ^{C2 = 10nF}
Vcc
R2
POWER-ON REF
R3
70 71 73 76 77 66
2
NOTE:
DIAGRAM IS REPRESENTATIVE
ONLY. REFER TO AN4364
FOR ACTUAL CIRCUIT
GP2021 CORRELATOR
80 PIN
POWER-ON
REF
LADDER
R3 =2.7k
R2 = 2.7k (Vcc = +3.0V)
= 6.8k (Vcc = +5.0V)
Fig. 4 GP2010 typical application
Ref 2
(24)
GP2010
(25)
Ref 1
33pF
22pF
10.000MHz
CRYSTAL
Fig. 5 Crystal Reference connections
10