商品型号： NE568AN 库存编号： 18426 热门程度： 品牌： Philips 外形封装： DIP-20 生产批号： 98+ 起售数量： 10 参 考 价： 0755-88393056 存货数量： 2137 产品简述： OP放大器 ,NE568AN 免费资料： 下载Datasheet

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NE568AN简介:150MHz 6V 400mW
DESCRIPTION
The NE568A is a monolithic phase-locked loop (PLL) which
operates from 1Hz to frequencies in excess of 150MHz and features
an extended supply voltage range and a lower temperature
coefficient of the VCO center frequency in comparison with its
predecessor, the NE 568. The NE568A is function and
pin-compatible with the NE568, requiring only minor changes in
peripheral circuitry (see Figure 3). Temperature compensation
network is different, no resistor on Pin 12, needs to be grounded and
Pin 13 has a 3.9kW resistor to ground. Timing cap, C2, is different
and for 70MHz operation with temperature compensation network
should be 16pF, not 34pF as was used in the NE568. The NE568A
has the following improvements: ESD protected; extended VCC
range from 4.5V to 5.5V; operating temperature range -55 to 125°C
(see Signetics Military 568A data sheet); less layout sensitivity; and
lower TC of VCO (center frequency). The integrated circuit consists
of a limiting amplifier, a current-controlled oscillator (ICO), a phase
detector, a level shift circuit, V/I and I/V converters, an output buffer,
and bias circuitry with temperature and frequency compensating
characteristics. The design of the NE568A is particularly well-suited
for demodulation of FM signals with extremely large deviation in
systems which require a highly linear output. In satellite receiver
applications with a 70MHz IF, the NE568A will demodulate ±20%
deviations with less than 1.0% typical non-linearity. In addition to
high linearity, the circuit has a loop filter which can be configured
with series or shunt elements to optimize loop dynamic
performance. The NE568A is available in 20-pin dual in-line and
20-pin SO (surface mounted) plastic packages.

NE568AN 时间:2006-9-13 14:18:00

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