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參數(shù)資料
| 型號： | SP5070 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | 2.4GHz Fixed Modulus Frequency Synthesiser(2.4GHz固定模數(shù)頻率合成器) |
| 中文描述： | 2.4GHz的固定模頻率合成器（2.4GHz的固定模數(shù)頻率合成器） |
| 文件頁數(shù)： | 3/7頁 |
| 文件大小： | 179K |
| 代理商： | SP5070 |
SP5070
3
FUNCTIONAL DESCRIPTION
The SP5070, when used with a voltage controlled
oscillator, forms a complete phase locked loop frequency
synthesiser.
The phase comparator comparison frequency is
obtained by dividing the reference frequency. This may be
generated on-chip by means of an external crystal, or from
an external reference oscillator.
The output of the prescaler is divided by the fixed
modulus divider, producing an output frequency which is
phased locked to the comparison frequency.
The divider stages are arranged to give a fixed ratio
between the synthesised frequency and the reference of
256:1. Any frequency within the range of 300MHz to 2.4GHz
may be achieved by using the appropriate reference or
crystal frequency.
A single external transistor, driven from the charge
pump output, provides the output drive necessary for the
oscillator varicap line.
A test facility which disables the charge pump is also
provided. This is activated when a negative voltage is
applied to pin 11, see electrical characteristics above. When
the device is in this mode, F
COMP
and F
DIV
are also available
at outputs TEST1 and TEST2 respectively. These are open
collector outputs and are each capable of sinking a minimum
of 1mA. In normal mode of operation these outputs are high
impedance.
For compatibility with SP5060/SP5062, pin 11 may be
connected toV
CC
Fig.3 Typical application and test circuit (1024MHz with 4MHz reference crystal)
Fig.4 Application using external reference oscillator
1
2
3
4
5
6
7
14
13
12
11
DP14
10
9
8
S
P
5
0
7
0
+5V
1n
1n
FROM
VCO
2N3904
10K
47K
10n
22K
22K
47n
180n
+30V
100p
FROM
REFERENCE
OSCILLATOR
VARICAP
INPUT
VCO
1
2
3
4
5
6
7
14
13
12
11
10
9
8
S
P
5
0
7
0
+5V
1n
1n
FROM
VCO
2N3904
10K
47K
10n
22K
22K
47n
180n
+30V
68p
4MHz
REFERENCE
CRYSTAL
VARICAP
INPUT
VCO
47P
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP5070DP | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:2.GHz Fixed Modulus Frequency Synthesiser |
| SP5070FMP | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:2.GHz Fixed Modulus Frequency Synthesiser |
| SP5073 | 制造商:RIEDON 功能描述: |
| SP50771 DIE | 制造商:Harris Corporation 功能描述: |
| SP5078 | 制造商:CORSTAT CONTAINERS 功能描述:DIVIDER 16X3CM SLOTS PK5 |
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