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參數(shù)資料
| 型號(hào)： | SP8853BHC |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | MOSFET; Transistor Polarity:N Channel; Drain Source Voltage, Vds:30V; Continuous Drain Current, Id:20A; On-Resistance, Rds(on):7mohm; Rds(on) Test Voltage, Vgs:10V; Package/Case:TO-252; Leaded Process Compatible:No |
| 中文描述： | 1.3 GHz的專業(yè)合成器 |
| 文件頁(yè)數(shù)： | 6/14頁(yè) |
| 文件大?。?/td> | 210K |
| 代理商： | SP8853BHC |
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6
SP8853A/B
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
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
SP8853
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
Fig. 6a Typical application
1
28
27
26
25
24
SP8853
Cd
V
CC
Ra
Ra
2
3
TO LOOP
AMPLIFIER
Fig. 6c Use of lock detect circuit with PD1
Fig. 6b Connection
of external reference
EXTERNAL
REFERENCE
SOURCE
NC
21
20
19
1
5V
22k
470
TO VCO
VARICAP
SUPPLY
10k
LOOP
FILTER
FROM
CHARGE
PUMP
Fig. 6d Simple discrete amplifier
Ra
>
2
3
0·25
PD2 current
V
CC
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PDF描述 |
|---|---|
| SP8854E | 2.7GHz Parallel Load Professional Synthesiser(2.7GHz并行負(fù)載專業(yè)合成器) |
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| SP8855 | MOSFET; Transistor Polarity:N Channel; Drain Source Voltage, Vds:30V; Continuous Drain Current, Id:15A; On-Resistance, Rds(on):10mohm; Rds(on) Test Voltage, Vgs:10V; Package/Case:TO-252; Leaded Process Compatible:No |
| SP8855E | 2.8GHz Parallel Load Professional Synthesiser |
| SP8858 | 1·5GHz Professional Synthesiser |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP8854 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:2·7GHz Parallel Load Professional Synthesiser |
| SP8854D | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:1.7GHz PARALLEL LOAD PROFESSIONAL SYNTHESISER |
| SP8854DIGHCAR | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:1.7GHz PARALLEL LOAD PROFESSIONAL SYNTHESISER |
| SP8854DKGHCAR | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:1.7GHz PARALLEL LOAD PROFESSIONAL SYNTHESISER |
| SP8854E | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:2·7GHz Parallel Load Professional Synthesiser |
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