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參數(shù)資料
| 型號(hào)： | ICS840001CK-32 |
| 英文描述： | FEMTOCLOCKS-TM CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| 中文描述： | FEMTOCLOCKS -商標(biāo)晶體到的LVCMOS / LVTTL頻率合成器 |
| 文件頁(yè)數(shù)： | 7/10頁(yè) |
| 文件大?。?/td> | 183K |
| 代理商： | ICS840001CK-32 |
840001CK-32
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 23, 2005
7
Integrated
Circuit
Systems, Inc.
ICS840001-32
F
EMTO
C
LOCKS
C
RYSTAL
-
TO
-
LVCMOS/LVTTL F
REQUENCY
S
YNTHESIZER
PRELIMINARY
A
PPLICATION
I
NFORMATION
RYSTAL
I
NPU
t I
NTERFACE
C
RYSTAL
I
NPUT
I
NTERFACE
The ICS840001-32 has been characterized with 10pF paral-
lel resonant crystals. The capacitor values, C1 and C2, shown
in
Figure 2
below were determined using a 40MHz, 10pF
parallel resonant crystal and were chosen to minimize the
ppm error. The optimum C1 and C2 values can be slightly
adjusted for different board layouts.
As in any high speed analog circuitry, the power supply pins are
vulnerable to random noise. The ICS840001-32 provides sepa-
rate power supplies to isolate any high switching noise from
the outputs to the internal PLL. V
DD
, V
DDA
and V
DDO_X
should be
individually connected to the power supply plane through
vias, and bypass capacitors should be used for each pin. To
achieve optimum jitter performance, power supply isolation
is required.
Figure 1
illustrates how a 10
Ω
resistor along with
a 10
μ
F and a .01
μ
F bypass capacitor should be connected to
each V
DDA
pin. The 10
Ω
resistor can also be replaced by a
ferrite bead.
P
OWER
S
UPPLY
F
ILTERING
T
ECHNIQUES
F
IGURE
1. P
OWER
S
UPPLY
F
ILTERING
10
Ω
V
DDA
10
μ
F
.01
μ
F
3.3V
.01
μ
F
V
DD
C1
X1
Crystal
C2
XTAL_IN
XTAL_OUT
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| ICS840001CK-32LF | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840001CK-32LFT | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840001CK-32T | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840001I | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840002 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
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