Notes: (i) Measured on the " />
參數(shù)資料
型號: ACS8946T
廠商: Semtech
文件頁數(shù): 26/40頁
文件大小: 0K
描述: IC JITTER ATT MULT PLL 48-QFN
標準包裝: 1
類型: 時鐘/頻率發(fā)生器,多路復用器
PLL:
主要目的: 以太網(wǎng),SONET/SDH
輸入: LVPECL
輸出: CML,LVPECL
電路數(shù): 1
比率 - 輸入:輸出: 2:4
差分 - 輸入:輸出: 是/是
頻率 - 最大: 625MHz
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
供應商設備封裝: 48-QFN(7x7)
包裝: 托盤
ADVANCED COMMUNICATIONS
FINAL
DATASHEET
Revision 3/November 2006 Semtech Corp.
Page 32
www.semtech.com
ACS8946 JAM PLL
Notes: (i) Measured on the ACS8946 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 27 Output Jitter Generation: ACS8946 Stand-alone @38.88 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
*
5.3
12.9
ps p-p
-0.5
1.3
ps rms
500 Hz to
1.3 MHz
0.5 UI p-p = 3215 ps
*
111.1
304.7
ps p-p
-
11.1
30.5
ps rms
STM-4 622 MHz 250 kHz to
5MHz
0.1 UI p-p = 161 ps
*
3.3
5.4
ps p-p
-0.3
0.5
ps rms
1 kHz to 5 MHz
0.5 UI p-p = 804 ps
*
86.9
224.5
ps p-p
-
8.7
22.4
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
*
33.7
100.0
ps p-p
-
3.7
10.0
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
*
5.3
12.9
ps p-p
-0.5
1.3
ps rms
G.813
Option 2[4]
STM-1 155 MHz 12 kHz to
1.3 MHz
0.1 UI p-p = 643 ps
*
19.3
56.1
ps p-p
-1.9
5.6
ps rms
STM-4 622 MHz 12 kHz to 5 MHz 0.1 UI p-p = 161 ps
*
19.5
51.2
ps p-p
-1.9
5.1
ps rms
STM-16 2.5 GHz 12 kHz to
20 MHz
0.1 UI p-p = 40 ps
*
19.6
51.7
ps p-p
2.0
5.2
ps rms
GR-253-
OC-3/STS-3
155 MHz
12 kHz to
1.3 MHz
0.1 UI p-p = 643 ps
*
19.3
56.1
ps p-p
0.01 UI rms = 64.3 ps
1.9
5.6
ps rms
OC-12/STS-12
622 MHz
12 kHz to 5 MHz 0.1 UI p-p = 161 ps
*
19.5
51.2
ps p-p
0.01 UI p-p = 16.1 ps
1.9
5.1
ps rms
OC-48/STS-48
2.5 GHz
5 kHz to 20 MHz 1.5 UI p-p = 600 ps
*
37.3
100.0
ps p-p
-
3.7
10.0
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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