參數(shù)資料
型號(hào)： LMX2372
廠商： National Semiconductor Corporation
英文描述： PLLatinum⑩ Dual Frequency Synthesizer for RF Personal Communications
中文描述： PLLatinum⑩雙頻率合成射頻個(gè)人通信
文件頁(yè)數(shù)： 12/16頁(yè)
文件大?。?/td> 217K
代理商： LMX2372
2.0 Programming Description
(Continued)
2.3.7 Power Down Mode Table
Main PLL
Auxiliary PLL
Main
Counters
ON
ON
OFF
OFF
Auxiliary
Counters
ON
OFF
ON
OFF
OSC
in
Buffer
Active
Active
Active
ON
ON
ON
OFF
Powered Down
Active
Powered Down
Powered Down
Powered Down
2.4 PROGRAMMABLE MODES
Several modes of operation can be programmed with bits R15–R19 including the phase detector polarity, charge pump magni-
tude, charge pump TRI-STATE and the output of the Fo/LD pin. The programmable modes are shown in Table 1. Truth table for
the programmable modes and Fo/LD output are shown in Table 2 and Table 3.
2.4.1 Programmable Modes Table
R19
R18
R17
Charge
Pump
TRI-STATE
Aux_CP
o
_TRI
Main_CP
o
_TRI
R16
Charge
Pump
Magnitude
Aux_CP
o
_4X
Main_CP
o
_4X
R15
Phase
Detector
Polarity
Aux_PD_POL
Main_PD_POL
Address[1:0]
f
OUT
/Lock Detect
FoLD 1
FoLD 3
FoLD 0
FoLD 2
0 0
1 0
2.4.2 Mode Select Truth Table
CP
o
_TRI
(Note 6)
Normal Operation
TRI-STATE
CP
o
_4X
(Note 7)
1X Current
4X Current
PD_POL
(Note 8)
LOW
HIGH
0
1
Note 6:
Both synchronous and asynchronous power down modes are available with the LMX237X family to be able to adapt to different types of applications. The
MICROWIRE control register remains active and capable of loading and latching in data during all of the powerdown modes.
Note 7:
ICP
o
(charge pump current magnitude) is dependent on Vp. The ICP
o
LOW current state = 1/4 x ICP
o
HIGH current.
Note 8:
See Section 2.4.3
2.4.3 Phase Detector Polarity (Aux_PD_POL, Main_PD_POL)
Depending upon VCO characteristics, the Aux_PD_POL
(Aux_R15) and Main_PD_POL (Main_R15) bits should be
set accordingly:
When VCO characteristics are positive like (1), R15 should
be set HIGH;
When VCO characteristics are negative like (2), R15 should
be set LOW.
VCO CHARACTERISTICS
DS101026-5
www.national.com
12
相關(guān)PDF資料
PDF描述
LMX2372SLBX PLLatinum⑩ Dual Frequency Synthesizer for RF Personal Communications
LMX2372TMX PLLatinum⑩ Dual Frequency Synthesizer for RF Personal Communications
LMX2372TM PLLatinum⑩ Dual Frequency Synthesizer for RF Personal Communications
LMX2377UTMX PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications
LMX2377UTM Enclosed Switches Series LS: Side Rotary with 1.5" to 3.5" Adjustable Length Lever; Nylon Roller; 1NC 1NO SPDT Snap Action, Double Break; 0.5 in - 14NPT conduit; Plug-in
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX2372 WAF 制造商:Texas Instruments 功能描述:
LMX2372SLBX 功能描述:IC FREQ SYNTH DUAL 24LAMINATECSP RoHS:否 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:PLLatinum™ 標(biāo)準(zhǔn)包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時(shí)鐘 輸出:時(shí)鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無(wú)/無(wú) 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:*
LMX2372TM 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Dual Frequency Synthesizer for RF Personal Communications
LMX2372TMX 功能描述:IC FREQ SYNTH DUAL 20-TSSOP 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:PLLatinum™ 標(biāo)準(zhǔn)包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時(shí)鐘 輸出:時(shí)鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無(wú)/無(wú) 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:*
LMX2377U 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*