參數(shù)資料
型號(hào)： LMX2314
廠商： National Semiconductor Corporation
英文描述： 1.2 GHz Frequency Synthesizer for RF Personal Communications
中文描述： 1.2千兆赫頻率合成射頻個(gè)人通信
文件頁(yè)數(shù)： 11/20頁(yè)
文件大小： 371K
代理商： LMX2314
Functional Description
(Continued)
SERIAL DATA INPUT TIMING
TL/W/11766–8
Notes:
Parenthesis data indicates programmable reference divider data.
Data shifted into register on clock rising edge.
Data is shifted in MSB first.
Test Conditions:
The Serial Data Input Timing is tested using a symmetrical waveform around V
CC
/2. The test waveform has an edge rate of 0.6 V/ns with
amplitudes of 2.2V
@
V
CC
e
2.7V and 2.6V
@
V
CC
e
5.5V.
Phase Characteristics
In normal operation, the FC pin is used to reverse the polari-
ty of the phase detector. Both the internal and any external
charge pump are affected.
Depending upon VCO characteristics, FC pin should be set
accordingly:
When VCO characteristics are like (1), FC should be set
HIGH or OPEN CIRCUIT;
When VCO characteristics are like (2), FC should be set
LOW.
When FC is set HIGH or OPEN CIRCUIT, the monitor pin of
the phase comparator input, f
out
, is set to the reference
divider output, f
r
. When FC is set LOW, f
out
is set to the
programmable divider output, f
p
.
VCO Characteristics
TL/W/11766–9
PHASE COMPARATOR AND INTERNAL CHARGE PUMP CHARACTERISTICS
TL/W/11766–10
Notes:
Phase difference detection range:
b
2
q
to
a
2
q
The minimum width pump up and pump down current pulses occur at the D
o
pin when the loop is locked.
FC
e
HIGH
11
相關(guān)PDF資料
PDF描述
LMX2314M 1.2 GHz Frequency Synthesizer for RF Personal Communications
LMX2314MX 1.2 GHz Frequency Synthesizer for RF Personal Communications
LMX2315 Frequency Synthesizer for RF Personal Communications
LMX2315TM Frequency Synthesizer for RF Personal Communications
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX2314M 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:1.2 GHz Frequency Synthesizer for RF Personal Communications
LMX2314MX 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:1.2 GHz Frequency Synthesizer for RF Personal Communications
LMX2315 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:1.2 GHz Frequency Synthesizer for RF Personal Communications
LMX2315D WAF 制造商:Texas Instruments 功能描述:
LMX2315TM 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:1.2 GHz Frequency Synthesizer for RF Personal Communications
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