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參數(shù)資料
| 型號： | MB15E07SRPFT |
| 廠商： | FUJITSU LTD |
| 元件分類： | XO, clock |
| 英文描述： | Single Serial Input PLL Frequency Synthesizer On-chip 2.5 GHz Prescaler |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 2500 MHz, PDSO16 |
| 封裝： | PLASTIC, TSSOP-16 |
| 文件頁數(shù)： | 11/25頁 |
| 文件大?。?/td> | 156K |
| 代理商： | MB15E07SRPFT |
MB15E07SR
11
When designing a synthesizer, the FC pin setting depends on the VCO and LPF characteristics.
3. Power Saving Mode (Intermittent Mode Control Circuit)
Table 9. PS Pin Setting
The intermittent mode control circuit reduces the PLL power consumption.
By setting the PS pin low, the device enters into the power saving mode, reducing the current consumption. See
the Electrical Characteristics chart for the specific value.
The phase detector output, Do, becomes high impedance.
For the signal PLL, the lock detector, LD, remains high, indicating a locked condition.
Setting the PS pin high, releases the power saving mode, and the device works normally.
The intermittent mode control circuit also ensures a smooth startup when the device returns to normal operation.
When the PLL is returned to normal operation, the phase comparator output signal is unpredictable. This is
because of the unknown relationship between the comparison frequency (fp) and the reference frequency (fr)
which can cause a major change in the comparator output, resulting in a VCO frequency jump and an increase
in lockup time.
To prevent a major VCO frequency jump, the intermittent mode control circuit limits the magnitude of the error
signal from the phase detector when it returns to normal operation.
PS pin
Status
H
Normal mode
L
Power saving mode
(1)
(2)
When the LPF and VCO characteristics are similar
to (1), set FC bit high.
When the VCO characteristics are similar to (2),
set FC bit low.
VCO
Output
Frequency
LPF Output Voltage
PLL
LPF
VCO
Note : Give attention to the polarity for using active type LPF.
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| MB15E07SRPFT-G-BND | 制造商:FUJITSU 功能描述: |
| MB15E07SRPFT-G-BNDE1 | 制造商:FUJITSU 功能描述: |
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| MB15E07SRPFT-G-BND-ERE1 | 功能描述:IC SYNTHESIZR PLL 2.5GHZ 16TSSOP 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:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 類型:PLL 頻率合成器 PLL:是 輸入:晶體 輸出:時(shí)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 |
| MB15E07SRPV1 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Single Serial Input PLL Frequency Synthesizer On-chip 2.5 GHz Prescaler |
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