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參數(shù)資料
| 型號： | ADF4156BCPZ-RL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | XO, clock |
| 英文描述： | 6 GHz Fractional-N Frequency Synthesizer |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 6200 MHz, QCC20 |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, MO-220VGGD-1, LFCSP-20 |
| 文件頁數(shù)： | 8/24頁 |
| 文件大?。?/td> | 314K |
| 代理商： | ADF4156BCPZ-RL7 |
ADF4156
CIRCUIT DESCRIPTION
REFERENCE INPUT SECTION
The reference input stage is shown in Figure 11. SW1 and SW2
are normally closed switches. SW3 is normally open. When
power-down is initiated, SW3 is closed and SW1 and SW2 are
opened. This ensures that there is no loading of the REF
IN
pin
on power-down.
Rev. 0 | Page 8 of 24
BUFFER
TO R COUNTER
REF
IN
100k
NC
SW2
SW3
NO
NC
SW1
POWER-DOWN
CONTROL
0
Figure 11. Reference Input Stage
RF INPUT STAGE
The RF input stage is shown in Figure 12. It is followed by a
2-stage limiting amplifier to generate the current-mode logic
(CML) clock levels needed for the prescaler.
BIAS
GENERATOR
1.6V
AGND
AV
DD
RF
IN
B
RF
IN
A
2k
2k
0
Figure 12. RF Input Stage
RF INT DIVIDER
The RF INT counter allows a division ratio in the PLL feedback
counter. Division ratios from 23 to 4095 are allowed.
INT, FRAC, MOD, AND R RELATIONSHIP
The INT, FRAC, and MOD values, in conjunction with the
R counter, make it possible to generate output frequencies that
are spaced by fractions of the phase frequency detector (PFD).
See the RF Synthesizer: A Worked Example section for more
information. The RF VCO frequency (
RF
OUT
) equation is
RF
OUT
=
F
PFD
× (
INT
+ (
FRAC
/
MOD
))
(1)
where
RF
OUT
is the output frequency of external voltage
controlled oscillator (VCO).
F
PFD
=
REF
IN
× [(1 +
D
)/(
R
× (1 +
T
))]
where:
REF
IN
is the reference input frequency.
D
is the REF
IN
doubler bit.
T is the REF
IN
divide-by-2 bit (0 or 1).
R
is the preset divide ratio of binary 5-bit programmable
reference counter (1 to 32).
INT
is the preset divide ratio of binary 12-bit counter
(23 to 4095).
MOD
is the preset fractional modulus (2 to 4095).
FRAC
is the numerator of the fractional division (0 to MOD1).
(2)
THIRD ORDER
FRACTIONAL
INTERPOLATOR
FRAC
VALUE
MOD
REG
INT
REG
RF N DIVIDER
N = INT + FRAC/MOD
FROM RF
INPUT STAGE
TO PFD
N COUNTER
0
Figure 13. RF INT Divider
RF R COUNTER
The 5-bit RF R counter allows the input reference frequency
(REF
IN
) to be divided down to produce the reference clock to
the PFD. Division ratios from 1 to 32 are allowed.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADF4156BCPZ-U1 | 制造商:Analog Devices 功能描述:FRACTIONAL-N SYNTH. W/FASTLOCK COUNTER - Trays |
| ADF4156BRUZ | 功能描述:IC PLL FRAC-N FREQ SYNTH 16TSSOP RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 類型:PLL 頻率合成器 PLL:是 輸入:晶體 輸出:時(shí)鐘 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無/無 頻率 - 最大:1GHz 除法器/乘法器:是/無 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-LSSOP（0.175"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-SSOP 包裝:帶卷 (TR) 其它名稱:NJW1504V-TE1-NDNJW1504V-TE1TR |
| ADF4156BRUZ-RL | 功能描述:IC PLL FRAC-N FREQ SYNTH 16TSSOP RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:Precision Edge® 類型:時(shí)鐘/頻率合成器 PLL:無 輸入:CML，PECL 輸出:CML 電路數(shù):1 比率 - 輸入:輸出:2:1 差分 - 輸入:輸出:是/是 頻率 - 最大:10.7GHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-VFQFN 裸露焊盤，16-MLF? 供應(yīng)商設(shè)備封裝:16-MLF?（3x3） 包裝:帶卷 (TR) 其它名稱:SY58052UMGTRSY58052UMGTR-ND |
| ADF4156BRUZ-RL7 | 功能描述:IC PLL FRAC-N FREQ SYNTH 16TSSOP RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:Precision Edge® 類型:時(shí)鐘/頻率合成器 PLL:無 輸入:CML，PECL 輸出:CML 電路數(shù):1 比率 - 輸入:輸出:2:1 差分 - 輸入:輸出:是/是 頻率 - 最大:10.7GHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-VFQFN 裸露焊盤，16-MLF? 供應(yīng)商設(shè)備封裝:16-MLF?（3x3） 包裝:帶卷 (TR) 其它名稱:SY58052UMGTRSY58052UMGTR-ND |
| ADF4156SP1BRUZ | 制造商:Analog Devices 功能描述: |
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