Notes: (i) Measured on the " />
參數(shù)資料
型號: ACS8944T
廠商: Semtech
文件頁數(shù): 8/24頁
文件大?。?/td> 0K
描述: IC JITTER ATT MULT PLL 48-QFN
標(biāo)準(zhǔn)包裝: 1
類型: 時鐘/頻率發(fā)生器,多路復(fù)用器
PLL:
主要目的: SONET/SDH
輸入: LVPECL
輸出: LVPECL
電路數(shù): 1
比率 - 輸入:輸出: 1:1
差分 - 輸入:輸出: 是/是
頻率 - 最大: 155.52MHz
電源電壓: 3.135 V ~ 3.465 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 48-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 48-QFN(7x7)
包裝: 管件
ADVANCED COMMUNICATIONS
FINAL
DATASHEET
Revision 3/November 2006 Semtech Corp.
Page 16
www.semtech.com
ACS8944 JAM PLL
Notes: (i) Measured on the ACS8944 Evaluation Board using output clock OUT1, with a 0 dBm reference clock from an ESG E4400B signal
generator AC coupled to CLK1. VDD = 3.0 V to 3.465 V, TA -40°C to +85°C.
(ii) “*” Derived values using the normal Gaussian crest value ratio of 10.
(iii) PLL Closed Loop bandwidth set to 2 KHz with a damping factor of 1.2.
(iv) All measurement results are derived from the phase noise plots using integration ranges defined by the telecommunication
standards' specifications.
Table 17 Output Jitter Generation: ACS8944 Stand-alone @77.76 MHz Input/155.52 MHz Output
Test Definition
Measured Results
Specification
Interface
Frequency
Filter Spec (iv)
Spec Limit
Typical
Max
Units
G.813
Option 1[4],
and ETSI
EN 300 462 -
7 - 1[1]
STM-1 (optical)
155 MHz
65 kHz to
1.3 MHz
0.1 UI p-p = 643 ps
*
5.1
12.3
ps p-p
-0.5
1.2
ps rms
500 Hz to
1.3 MHz
0.5 UI p-p = 3215 ps
*
102.6
281.3
ps p-p
-
10.3
28.1
ps rms
STM-4 622 MHz 250 kHz to
5MHz
0.1 UI p-p = 161 ps
*
3.2
5.4
ps p-p
-0.3
0.5
ps rms
1 kHz to 5 MHz
0.5 UI p-p = 804 ps
*
76.6
197.8
ps p-p
-
7.7
19.8
ps rms
STM-16 2.5 GHz 1 MHz to
20 MHz
0.1 UI p-p = 40 ps
*
3.7
6.2
ps p-p
-0.4
0.6
ps rms
5 kHz to 20 MHz 0.5 UI p-p = 201 ps
*
32.7
87.5
ps p-p
-3.3
8.7
ps rms
ETSI
EN 300 462 -
7 - 1[1]
STM-1
(electrical)
155 MHz
65 kHz to
1.3 MHz
0.075 UI p-p = 482 ps
*
5.1
12.3
ps p-p
-0.5
1.2
ps rms
G.813
Option 2[4]
STM-1 155 MHz 12 kHz to
1.3 MHz
0.1 UI p-p = 643 ps
*
17.5
50.8
ps p-p
-1.7
5.1
ps rms
STM-4 622 MHz 12 kHz to 5 MHz 0.1 UI p-p = 161 ps
*
17.6
46.4
ps p-p
-1.8
4.6
ps rms
STM-16 2.5 GHz 12 kHz to
20 MHz
0.1 UI p-p = 40 ps
*
17.8
46.9
ps p-p
1.8
4.7
ps rms
GR-253-
OC-3/STS-3
155 MHz
12 kHz to
1.3 MHz
0.1 UI p-p = 643 ps
*
17.5
50.8
ps p-p
0.01 UI rms = 64.3 ps
1.7
5.1
ps rms
OC-12/STS-12
622 MHz
12 kHz to 5 MHz 0.1 UI p-p = 161 ps
*
17.6
46.4
ps p-p
0.01 UI p-p = 16.1 ps
1.8
4.6
ps rms
OC-48/STS-48
2.5 GHz
5 kHz to 20 MHz 1.5 UI p-p = 600 ps
*
32.7
87.5
ps p-p
-3.3
8.7
ps rms
1 MHz to
20 MHz
0.15 UI p-p = 60 ps
*
3.7
6.2
ps p-p
-0.4
0.6
ps rms
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