參數(shù)資料
型號(hào): CDCE401YS
廠商: Texas Instruments, Inc.
英文描述: OSCILLATOR IC WITH ELECTRONIC CALIBRATION
中文描述: 振蕩器IC與電子校準(zhǔn)
文件頁數(shù): 15/19頁
文件大?。?/td> 246K
代理商: CDCE401YS
www.ti.com
APPLICATION INFORMATION
CRYSTAL OSCILLATOR LEVEL CONVERSION
XIN
OG[1:0]
OG[1:0]
OP[2:0]
O
P
EN
FOUT
XOUT
VSS
Oscillator Case With 4 Pins
CXOUT
C
BASE
CXOUT
C
BASE
Var
C
BASE
Var
C
BASE
C
L
C
L
CXO[7:0]
Read-Back
Mode
CXI[7:0]
Oscillator
Gain
Stage
EEPROM
and
Control
Logic
SDATA
EN and
SDATA
2 M
W
VDD
Divider
P
Bias
+
M
U
X
2 M
W
B0027-04
L
L
L
C
15 pF
=
LOAD
C
= 100 nF
Filter
VSUPPLY
2.25 V – 3.3 V
CDCE401
SCAS820–JUNE 2006
Figure 7. Crystal Oscillator Application at 40 MHz in a 4-Pin Oscillator Case
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Phase noise specifications under following assumptions:
Crystal with f = 40 MHz (L
S
= 10.534 mH, C
S
= 2.208 pF, C
P
= 0.551 pF) and post-divider
×
1
phn
10
Phase noise at 10 Hz
phn
100
Phase noise at 100 Hz
phn
1k
Phase noise at 1 kHz
phn
10k
Phase noise at 10 kHz
phn
100k
Phase noise at 100 kHz
phn
1M
Phase noise at 1 MHz
VDD = 2.5 V
VDD = 2.5 V
VDD = 2.5 V
VDD = 2.5 V
VDD = 2.5 V
VDD = 2.5 V
–70
–100
–130
–145
–150
–150
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
15
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