RSET Connecting a resistor between this p" />
參數(shù)資料
型號(hào): ADF4350BCPZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 31/32頁(yè)
文件大?。?/td> 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(jì)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(biāo)準(zhǔn)包裝: 1
類型: 扇出配送,分?jǐn)?shù)-N,整數(shù)-N,時(shí)鐘/頻率合成器(RF)
PLL:
輸入: CMOS,TTL
輸出: 時(shí)鐘
電路數(shù): 1
比率 - 輸入:輸出: 1:3
差分 - 輸入:輸出: 無(wú)/無(wú)
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: 托盤
ADF4350
Rev. A | Page 8 of 32
Pin No.
Mnemonic
Description
22
RSET
Connecting a resistor between this pin and GND sets the charge pump output current. The nominal voltage
bias at the RSET pin is 0.55 V. The relationship between ICP and RSET is
SET
CP
R
25.5
I
=
where:
RSET = 5.1 kΩ
ICP = 5 mA
23
VCOM
Internal Compensation Node Biased at Half the Tuning Range. Decoupling capacitors to the ground plane
should be placed as close as possible to this pin.
24
VREF
Reference Voltage. Decoupling capacitors to the ground plane should be placed as close as possible to this pin.
25
LD
Lock Detect Output Pin. This pin outputs a logic high to indicate PLL lock. A logic low output indicates loss of PLL lock.
26
PDBRF
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 path for DVDD.
28
DVDD
Digital Power Supply. This pin should be the same voltage as AVDD. Decoupling capacitors to the ground plane
should be placed as close as possible to this pin.
29
REFIN
Reference Input. This is a CMOS input with a nominal threshold of VDD/2 and a dc equivalent input resistance of
100 kΩ. This input can be driven from a TTL or CMOS crystal oscillator, or it can be ac-coupled.
30
MUXOUT
Multiplexer Output. This multiplexer output allows either the lock detect, the scaled RF, or the scaled reference
frequency to be accessed externally.
31
SDGND
Digital Sigma-Delta (Σ-Δ) Modulator Ground. Ground return path for the Σ-Δ modulator.
32
SDVDD
Power Supply Pin for the Digital Σ-Δ Modulator. Should be the same voltage as AVDD. Decoupling capacitors to
the ground plane are to be placed as close as possible to this pin.
33
EP
Exposed Pad.
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