参数资料
型号: ADF4351BCPZ
厂商: Analog Devices Inc
文件页数: 27/28页
文件大小: 0K
描述: IC SYNTH PLL VCO 32LFCSP
标准包装: 1
类型: 扇出配送,分数-N,整数-N,时钟/频率合成器(RF)
PLL:
输入: CMOS,TTL
输出: 时钟
电路数: 1
比率 - 输入:输出: 1:3
差分 - 输入:输出: 无/无
频率 - 最大: 4.4GHz
除法器/乘法器: 是/是
电源电压: 3 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 32-VFQFN 裸露焊盘,CSP
供应商设备封装: 32-LFCSP(5x5)
包装: 托盘
ADF4351
Data Sheet
Rev. 0 | Page 8 of 28
Pin No.
Mnemonic
Description
22
R
SET
Connecting a resistor between this pin and ground sets the charge pump output current. The nominal voltage
bias at the R
SET pin is 0.55 V. The relationship between ICP and RSET is as follows:
I
CP = 25.5/RSET
where:
R
SET = 5.1 k.
I
CP = 5 mA.
23
V
COM
Internal Compensation Node. Biased at half the tuning range. Place decoupling capacitors to the ground plane
as close to this pin as possible.
24
V
REF
Reference Voltage. Place decoupling capacitors to the ground plane as close to this pin as possible.
25
LD
Lock Detect Output Pin. A logic high output on this pin indicates PLL lock. A logic low output indicates loss
of PLL lock.
26
PDB
RF
RF Power-Down. A logic low on this pin mutes the RF outputs. This function is also software controllable.
27
DGND
Digital Ground. Ground return pin for DV
DD.
28
DV
DD
Digital Power Supply. DV
DD must have the same value as AVDD. Place decoupling capacitors to the ground
plane as close to this pin as possible.
29
REF
IN
Reference Input. This CMOS input has a nominal threshold of AV
DD/2 and a dc equivalent input resistance of
100 k. This input can be driven from a TTL or CMOS crystal oscillator, or it can be ac-coupled.
30
MUXOUT
Multiplexer Output. The multiplexer output allows the lock detect value, the N divider value, or the R counter
value to be accessed externally.
31
SD
GND
Digital Σ-Δ Modulator Ground. Ground return pin for the Σ-Δ modulator.
32
SDV
DD
Power Supply Pin for the Digital Σ-Δ Modulator. SDV
DD must have the same value as AVDD. Place decoupling
capacitors to the ground plane as close to this pin as possible.
EP
Exposed Pad
Exposed Pad. The LFCSP has an exposed pad that must be connected to GND.
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