- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1989 > ADF4350BCPZ-RL (Analog Devices Inc)IC SYNTH PLL VCO FN/IN 32LFCSP PDF資料下載
參數(shù)資料
| 型號： | ADF4350BCPZ-RL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 11/32頁 |
| 文件大小： | 0K |
| 描述： | IC SYNTH PLL VCO FN/IN 32LFCSP |
| 產(chǎn)品變化通告： | ADF4350, ADF4905/6 N-counter Change 05/Mar/2012 |
| 設(shè)計資源： | Broadband Low EVM Direct Conversion Transmitter (CN0134) Broadband Low EVM Direct Conversion Transmitter Using LO Divide-by-2 Modulator (CN0144) Using low noise linear drop-out regulators to power wideband PLL & VCO IC's (CN0147) |
| 標準包裝： | 5,000 |
| 類型： | 扇出配送，分數(shù)-N，整數(shù)-N，時鐘/頻率合成器（RF） |
| PLL： | 是 |
| 輸入： | CMOS，TTL |
| 輸出： | 時鐘 |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 1:3 |
| 差分 - 輸入:輸出： | 無/無 |
| 頻率 - 最大： | 4.4GHz |
| 除法器/乘法器： | 是/是 |
| 電源電壓： | 3 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-VFQFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 32-LFCSP-VQ（5x5） |
| 包裝： | 帶卷 (TR) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁當前第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
ADF4350
Rev. A | Page 19 of 32
When the doubler is enabled and the lowest spur mode is
chosen, the in-band phase noise performance is sensitive to
the REFIN duty cycle. The phase noise degradation can be as
much as 5 dB for the REFIN duty cycles outside a 45% to 55%
range. The phase noise is insensitive to the REFIN duty cycle
in the lowest noise mode and when the doubler is disabled.
The maximum allowable REFIN frequency when the doubler
is enabled is 30 MHz.
RDIV2
Setting the DB24 bit to 1 inserts a divide-by-2 toggle flip-flop
between the R counter and PFD, which extends the maximum
REFIN input rate. This function allows a 50% duty cycle signal
to appear at the PFD input, which is necessary for cycle slip
reduction.
10–Bit R Counter
The 10–bit R counter allows the input reference frequency
(REFIN) to be divided down to produce the reference clock
to the PFD. Division ratios from 1 to 1023 are allowed.
Double Buffer
DB13 enables or disables double buffering of Bits [DB22:DB20]
in Register 4. The Divider Select section explains how double
buffering works.
Charge Pump Current Setting
Bits [DB12:DB09] set the charge pump current setting. This
should be set to the charge pump current that the loop filter
is designed with (see Figure 26).
LDF
Setting DB8 to 1 enables integer–N digital lock detect,
when the FRAC part of the divider is 0; setting DB8 to 0
enables fractional–N digital lock detect.
Lock Detect Precision (LDP)
When DB7 is set to 0, 40 consecutive PFD cycles of 10 ns must
occur before digital lock detect is set. When this bit is programmed
to 1, 40 consecutive reference cycles of 6 ns must occur before
digital lock detect is set. This refers to fractional-N digital lock
detect (set DB8 to 0). With integer–N digital lock detect activated
(set DB8 to 1), and DB7 set to 0, then five consecutive cycles of
6 ns need to occur before digital lock detect is set. When DB7 is
set to 1, five consecutive cycles of 10 ns must occur.
Phase Detector Polarity
DB6 sets the phase detector polarity. When a passive loop filter,
or noninverting active loop filter is used, this should be set to 1.
If an active filter with an inverting characteristic is used, it
should be set to 0.
Power-Down
DB5 provides the programmable power-down mode. Setting this
bit to 1 performs a power-down. Setting this bit to 0 returns the
synthesizer to normal operation. When in software power-down
mode, the part retains all information in its registers. Only if the
supply voltages are removed are the register contents lost.
When a power-down is activated, the following events occur:
The synthesizer counters are forced to their load state
conditions.
The VCO is powered down.
The charge pump is forced into three-state mode.
The digital lock detect circuitry is reset.
The RFOUT buffers are disabled.
The input register remains active and capable of loading
and latching data.
Charge Pump Three-State
DB4 puts the charge pump into three-state mode when
programmed to 1. It should be set to 0 for normal operation.
Counter Reset
DB3 is the R counter and N counter reset bit for the ADF4350.
When this is 1, the RF synthesizer N counter and R counter are
held in reset. For normal operation, this bit should be set to 0.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADF4351BCPZ | IC SYNTH PLL VCO 32LFCSP |
| ADF4360-0BCPZRL7 | IC SYNTHESIZER VCO 24LFCSP |
| ADF4360-1BCPZRL7 | IC SYNTHESIZER VCO 24LFCSP |
| ADF4360-2BCPZRL7 | IC SYNTHESIZER VCO 24LFCSP |
| ADF4360-3BCPZRL7 | IC SYNTHESIZER VCO 24LFCSP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADF4350BCPZ-RL7 | 功能描述:IC SYNTH PLL VCO FN/IN 32LFCSP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:- 標準包裝:2,000 系列:- 類型:PLL 頻率合成器 PLL:是 輸入:晶體 輸出:時鐘 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 |
| ADF4350BCPZ-U6 | 制造商:Analog Devices 功能描述: |
| ADF4350EB1Z | 制造商:Analog Devices 功能描述:AD EVAL BOARD - Bulk |
| ADF4351 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Wideband Synthesizer |
| ADF4351BCPZ | 功能描述:IC SYNTH PLL VCO 32LFCSP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:- 標準包裝:2,000 系列:- 類型:PLL 時鐘發(fā)生器 PLL:帶旁路 輸入:LVCMOS，LVPECL 輸出:LVCMOS 電路數(shù):1 比率 - 輸入:輸出:2:11 差分 - 輸入:輸出:是/無 頻率 - 最大:240MHz 除法器/乘法器:是/無 電源電壓:3.135 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:32-LQFP 供應(yīng)商設(shè)備封裝:32-TQFP（7x7） 包裝:帶卷 (TR) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。