参数资料
型号: CD-700LACGEB-25.000
厂商: VECTRON INTERNATIONAL
元件分类: XO, clock
英文描述: PHASE LOCKED LOOP, CQCC16
封装: HERMETIC SEALED, CERAMIC, SMD-16
文件页数: 14/14页
文件大小: 146K
代理商: CD-700LACGEB-25.000
CD-700, VCXO Based PLL
Vectron International
166 Glover Avenue, Norwalk, CT 06856 Tel: 1-88-VECTRON-1 http://www.vectron.com
Layout Considerations
To achieve stable, low noise performance good analog layout techniques should be incorporated and a
partial list is shown below.
The CD-700 should be treated more like an analog device and the power supply must be well decoupled
with a good quality RF 0.01 uF capacitor in parallel with a 0.1 uF capacitor, located as close to pin 14 as
possible and connected to ground. In some cases, a
Π filter such as a large capacitor (10uF) to ground, a
series ferrite bead or inductor with 0.01 uF and 100 pF capacitor to ground to decouple the device supply.
The traces for the OUT1, OUT2, RCLK and RDATA ouputs should be kept as short as possible. It is
common practice to use a series resistor ( 50 to 100 ohms ) in order to reduce reflections if these traces
are more than a couple of inches long. Also OUT1, OUT2, RCLK and RDATA should not be routed
directly underneath the device.
The op-amp loop filter components should be kept as close to the device as possible and the feedback
capacitor should be located close to the op-amp input terminal. The loop filter capacitor(s) should be low
leakage (polarized capacitors are allowed).
Unused outputs should be left floating and it is not required to load or terminate them (such as an ECL or
PECL output). Loading unused outputs will only increase current consumption.
相关PDF资料
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CD-700LACGEB-40.960 PHASE LOCKED LOOP, CQCC16
CD-700LACHCB-62.500 PHASE LOCKED LOOP, CQCC16
CD-700LACHDB-20.480 PHASE LOCKED LOOP, CQCC16
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