Rainbow Electronics ATR0635P1 - Manual (Page 25)

25
4979D–GPS–06/08
ATR0635P1
5. Crystals
The ATR0635P1 requires a GPS TCXO. The reference frequency is 23.104 MHz. By connecting
an optional RTC crystal, different power modes are available. The reference frequency is 32.768
kHz.
5.1 GPS
Figure 5-1. Equivalent Application Examples Using a GPS TCXO (See Table 5-1 on page 26 )
Figure 5-2. Application Example Using an External Reference Frequency and Balanced
Inputs (See
Table 5-2 on page 26 )
B2
A2
B3
A1
X
NX
XTO
NXTO
22 pF
4.7 pF
12 pF
TCXO
Do not
connect
B2
A2
B3
A1
X
NX
XTO
NXTO
22 pF
4.7 pF
12 pF
TCXO
Do not
connect
B2
A2
B3
A1
X
NX
XTO
NXTO
Do not
connect
1:1
V
in