LG KG290 - 26 Mhz Clock (DCXO, X500)

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3. TECHNICAL BRIEF
3.4 26 26 MHz Clock (DCXO, X500)
The 26 MHz clock(X500) consists of a DCXO (Digital Compensated Crystal Oscillator) which oscillates
at a frequency of 26 MHz. It is used within the AD6548, base band processor(AD6721,U103),
CAMERA( U400,AIT813G )
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Only for training and service purposes
0.1u
C519
12
34
26MHz
X500
TSX-3225_26MHZ
VCC_REF
12
VCC_TXVCO
VDD
13
VLDO1
15
16
VLDO2
VLDO3
9
RX1900
RX1900B
25
32
RX850
RX850B
31
30
RX900
RX900B
29
6
SCLK SDATA
5
SEN
7
TXOP_HI
11
10
TXOP_LO
VAFC_NC
18
14
VBAT
4
VCC_BBI
VCC_BBQ
24
VCC_FE
1
17
33
GND
2
I IB
3 8
NC
23
Q
QB
22
REFIN
20 19
REFINB
21
REF_OP
28
RX1800
RX1800B
27
26
U501
AD6548
C531
0.1u
27p
C521
39p
C541
0.15MM
IN
IP
Figure 3-3. DCXO CIRCUIT DIAGRAM