参数资料
| 型号： | ADF4157BRUZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 24/24页 |
| 文件大小： | 0K |
| 描述： | IC PLL FREQ SYNTH 6GHZ 16TSSOP |
| 标准包装： | 96 |
| 类型： | 分数 N 合成器（RF） |
| PLL： | 是 |
| 输入： | CMOS，TTL |
| 输出： | 时钟 |
| 电路数： | 1 |
| 比率 - 输入:输出： | 2:1 |
| 差分 - 输入:输出： | 是/无 |
| 频率 - 最大： | 6GHz |
| 除法器/乘法器： | 是/是 |
| 电源电压： | 2.7 V ~ 3.3 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 16-TSSOP |
| 包装： | 管件 |
| 产品目录页面： | 551 (CN2011-ZH PDF) |
| 配用： | EVAL-ADF4157EB1Z-ND - BOARD EVALUATION FOR ADF4157 |
Data Sheet
ADF4157
Rev. D | Page 9 of 24
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
open. This ensures that there is no loading of the REFIN pin on
power-down.
BUFFER
TO R COUNTER
REFIN
100
k
NC
SW2
SW3
NC
SW1
POWER-DOWN
CONTROL
05874-
005
Figure 11. Reference Input Stage
RF INPUT STAGE
The RF input stage is shown in Figure 12. It is followed by
a two-stage limiting amplifier to generate the current mode
logic (CML) clock levels needed for the prescaler.
BIAS
GENERATOR
1.6V
AGND
AVDD
2k
RFINB
RFINA
05874-
006
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.
25-BIT FIXED MODULUS
The ADF4157 has a 25-bit fixed modulus. This allows output
frequencies to be spaced with a resolution of
fRES = fPFD/225
where fPFD is the frequency of the phase frequency detector
(PFD). For example, with a PFD frequency of 10 MHz,
frequency steps of 0.298 Hz are possible.
INT, FRAC, AND R RELATIONSHIP
The INT and FRAC 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 (RFOUT) equation is
RFOUT = fPFD × (INT + (FRAC/225))
(1)
where:
RFOUT is the output frequency of the external voltage controlled
oscillator (VCO).
INT is the preset divide ratio of the binary 12-bit counter (23 to
4095).
FRAC is the numerator of the fractional division (0 to 225 1).
fPFD = REFIN × [(1 + D)/(R × (1 + T))]
(2)
where:
REFIN is the reference input frequency.
D is the REFIN doubler bit.
R is the preset divide ratio of the binary 5-bit programmable
reference counter (1 to 32).
T is the REFIN divide-by-2 bit (0 or 1).
RF R COUNTER
The 5-bit RF 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 32 are allowed.
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
05874-
007
Figure 13. RF N Divider
相关PDF资料 |
PDF描述 |
|---|---|
| X9317ZV8Z-2.7 | IC XDCP SGL 100TAP 1K 8-TSSOP |
| CS2200CP-CZZ | IC CLK MULT FRACTIONAL N 10MSOP |
| VE-24M-MX-B1 | CONVERTER MOD DC/DC 10V 75W |
| ADF4360-8BCPZ | IC SYNTHESIZER VCO 24-LFCSP |
| VE-JV0-MZ-S | CONVERTER MOD DC/DC 5V 25W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADF4157BRUZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:High Resolution 6 GHz Fractional-N Frequency Synthesizer |
| ADF4157BRUZ-RL | 功能描述:IC PLL FREQ SYNTH 6GHZ 16TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:- 标准包装:1,000 系列:Precision Edge® 类型:时钟/频率合成器 PLL:无 输入:CML，PECL 输出:CML 电路数:1 比率 - 输入:输出:2:1 差分 - 输入:输出:是/是 频率 - 最大:10.7GHz 除法器/乘法器:无/无 电源电压:2.375 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-VFQFN 裸露焊盘，16-MLF? 供应商设备封装:16-MLF?（3x3） 包装:带卷 (TR) 其它名称:SY58052UMGTRSY58052UMGTR-ND |
| ADF4157BRUZ-RL1 | 制造商:AD 制造商全称:Analog Devices 功能描述:High Resolution 6 GHz Fractional-N Frequency Synthesizer |
| ADF4157BRUZ-RL7 | 功能描述:IC PLL FREQ SYNTH 6GHZ 16TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:- 标准包装:1,000 系列:Precision Edge® 类型:时钟/频率合成器 PLL:无 输入:CML，PECL 输出:CML 电路数:1 比率 - 输入:输出:2:1 差分 - 输入:输出:是/是 频率 - 最大:10.7GHz 除法器/乘法器:无/无 电源电压:2.375 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-VFQFN 裸露焊盘，16-MLF? 供应商设备封装:16-MLF?（3x3） 包装:带卷 (TR) 其它名称:SY58052UMGTRSY58052UMGTR-ND |
| ADF4157BRUZ-RL71 | 制造商:AD 制造商全称:Analog Devices 功能描述:High Resolution 6 GHz Fractional-N Frequency Synthesizer |
发布紧急采购，3分钟左右您将得到回复。