Atr0601 [preliminary, Application circuit – Rainbow Electronics ATR0601 User Manual
Page 9
9
4866A–GPS–08/05
ATR0601 [Preliminary]
9.
Application Circuit
Figure 9-1.
Application Example Using a GPS Crystal with ESR
typ
= 12
Ω
(Please see
)
Note:
Please consider the recommended IF-filter layout, shown in
.
Figure 9-2.
Application Example Using a GPS Crystal with ESR
typ
≠
12
Ω
(Please see
)
Note:
The external series resistor R1 has to be selected depending on the typical value of the crystal
ESR. Please refer to Application Note “ATR0601: Crystal and TXCO selection”.
N
BPI
XTO
PMSS
Logic
PUrf
PUxto
RF
NRF
X
NX
XTO
NXTO
SC
SH
SL
EG
C
AG
C
O
BP
NB
P
BPI
D
A
VCO
PLL
D
A
SDI
10
11
21
22
23
24
4
5
3
6
5.6nH
1.3pF
1.3pF
SAW
5pF
5pF
VC
C
220nH
220nH
220nH
220nH
B4060
ATR0610
13
14
15
16
2
20
PU XTO
PU RF
Data out "high"
Data out "low"
Sample clock
TEST
9
MO
8
NC
12
4.7nH
1.5pF
47pF
VC
C
10nF
PU
R
F
GND
17
18
VC
C
VC
C
VD
IG
7
19
1
VC
C
VD
IG
VC
C
100nF
100nF
100nF
100pF
1
X1
27
47pF
47pF
82pF
Reference frequency: Application #1
LNA section (opt.)
X1
R1
47pF
47pF
82pF
4
5
3
6
X
NX
XTO
NXTO
Reference frequency: Application #2