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844002AG-01

更新时间： 2024-01-18 11:35:45

品牌	Logo	应用领域
艾迪悌 - IDT		/
页数	文件大小	规格书
15页	1141K
描述
FEMTOCLOCKS⑩ CRYSTAL-TOLVDS FREQUENCY SYNTHESIZER

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844002AG-01 数据手册

ICS844002-01

FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER

Parameter Measurement Information, continued

V_DD

➤

out

LVDS

DC Input

100

_OD/∆ V_OD

➤

out

Differential Offset Voltage Setup

Application Information

Power Supply Filtering Technique

As in any high speed analog circuitry, the power supply pins are

vulnerable to random noise. The ICS844002-01 provides separate

power supplies to isolate any high switching noise from the outputs

to the internal PLL. V_DD,V_DDAand V_DDOshould 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 10Ω resistor along with a 10µF and a 0.01µF

bypass capacitor should be connected to each V_DDApin.

3.3V or 2.5V

V_DD

.01µF

10Ω

V_DDA

.01µF

10µF

Figure 1. Power Supply Filtering

Recommendations for Unused Input and Output Pins

Outputs:

Inputs:

LVDS Outputs

LVCMOS Control Pins

All unused LVDS output pairs can be either left floating or

terminated with 100Ω across. If they are left floating, we

recommend that there is no trace attached.

All control pins have internal pull-ups or pull-downs; additional

resistance is not required but can be added for additional

protection. A 1kΩ resistor can be used.

REF_CLK INPUT

For applications not requiring the use of the reference clock,

it can be left floating. Though not required, but for additional

protection, a 1kΩ resistor can be tied from the REF_CLK to

ground.

Crystal Inputs

For applications not requiring the use of the crystal oscillator input,

both XTAL_IN and XTAL_OUT can be left floating. Though not

required, but for additional protection, a 1kΩ resistor can be tied

from XTAL_IN to ground.

IDT™ / ICS™ LVDS FREQUENCY SYNTHESIZER

ICS844002AG-01 REV. A SEPTEMBER 28, 2007

1...5 6 789 10 11...15

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844002AGI-01LF	IDT	获取价格	FEMTOCLOCKS CRYSTAL-TOLVDS FREQUENCY SYNTHESIZER
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