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參數(shù)資料
| 型號(hào)： | SP8861 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | 1.3GHz Low Power Single-Chip Frequency Synthesiser(1.3GHz低功耗單片頻率合成器) |
| 中文描述： | 1.3GHz的低功耗單芯片頻率合成器（1.3GHz的低功耗單片頻率合成器） |
| 文件頁數(shù)： | 6/13頁 |
| 文件大小： | 200K |
| 代理商： | SP8861 |
6
SP8861
An F1 or F2 update cycle will consist of a byte containing
24 bits whereas the reference byte will contain 18 bits. The
device requires 3 bytes, each with a chip select sequence,
totalling 66 bits to fully program.
When the dual modulus Acounter is set to
4
8/9, the data
required to set the counter is reduced by one bit, leaving an
unused bit in the 22-bit F1/F2 buffer. This bit must always be
set to zero when the
4
8/9 mode is required. Various
programming sequences are shown in Fig. 7.
The data entry and storage registers are always powered
up, making it possible to enter data when the device is in the
powered down state.
PD2
0
PD2
0
Result
1
0
1
0
1
1
F
REF
and F
PD
outputs off, charge pumps 1 and 2 on
F
REF
and F
PD
outputs on, charge pump 1 off, charge pump 2 on
F
REF
and F
PD
outputs off, charge pump 1 disabled by lock detect, charge pump 2 on
F
REF
and F
PD
outputs on, charge pump 1 disabled by lock detect, charge pump 2 on
Table 4
Fig. 6 Application diagrams
1
28
27
26
25
24
SP8861
V
CC
Cd
V
CC
Ra
Ra
2
3
TO LOOP
AMPLIFIER
Ra
>
2
3
0·25
PD2 current
EXTERNAL
REFERENCE
SOURCE
NC
21
20
19
1
5V
22k
470
TO VCO
VARICAP
SUPPLY
10k
LOOP
FILTER
FROM
CHARGE
PUMP
Fig. 6c Use of lock detect circuit with PD1
Fig. 6b Connection
of external reference
Fig. 6d Simple discrete amplifier
Fig. 6a Typical application
1
5V
CONTROL
MICRO
4
3
2
1
28
27
26
12
13
14
15
16
17
18
5
6
7
8
9
10
11
25
24
23
22
21
20
19
SP8861
1n
33p
39p
F
REF
F
PD
1
5V
1n
0·1
μ
1
5V
SL562
+
C1
C2
R2
Rx
Rx
LOOP FILTER
VOLTAGE
CONTROLLED
OSCILLATOR
1n
V
CC
2
1
5V
Rb
RPD
1
5V
2·2k
Rb
>
0·25
PD2 current
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PDF描述 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP8861/NA/HP | 制造商:Rochester Electronics LLC 功能描述: 制造商:Zarlink Semiconductor Inc 功能描述: 制造商:ZARLINK 功能描述: |
| SP8861HP | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:1·3GHz Low Power Single-Chip Frequency Synthesiser |
| SP8861NAHP | 制造商:Zarlink Semiconductor Inc 功能描述:PLL FREQUENCY SYNTHESIZER, 1300 MHz, PQCC28 |
| SP8902 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:5GHZ/ 2 Fixed Modulus Divider |
| SP8902/KG/MP1S | 制造商:Rochester Electronics LLC 功能描述: 制造商:Zarlink Semiconductor Inc 功能描述: |
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