参数资料
型号: ACS8946
元件分类: 数字传输电路
英文描述: ATM/SONET/SDH SUPPORT CIRCUIT, QCC48
封装: 7 X 7 MM, QFN-48
文件页数: 28/40页
文件大小: 663K
代理商: ACS8946
ADVANCED COMMUNICATIONS
FINAL
DATASHEET
Revision 3/November 2006 Semtech Corp.
Page 34
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 29 Output Jitter Generation: ACS8946 Stand-alone @125 MHz Input/156.25 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
*
4.9
11.8
ps p-p
-0.5
1.2
ps rms
500 Hz to
1.3 MHz
0.5 UI p-p = 3215 ps
*
81.5
223.6
ps p-p
-
8.2
22.4
ps rms
STM-4 622 MHz 250 kHz to
5MHz
0.1 UI p-p = 161 ps
*
3.2
5.3
ps p-p
-0.3
0.5
ps rms
1 kHz to 5 MHz
0.5 UI p-p = 804 ps
*
62.2
160.7
ps p-p
-
6.2
16.1
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
*
28.9
77.4
ps p-p
-2.9
7.7
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
*
4.9
11.8
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
*
16.0
46.3
ps p-p
-1.6
4.6
ps rms
STM-4 622 MHz 12 kHz to 5 MHz 0.1 UI p-p = 161 ps
*
16.1
42.4
ps p-p
-1.6
4.2
ps rms
STM-16 2.5 GHz 12 kHz to
20 MHz
0.1 UI p-p = 40 ps
*
16.3
42.9
ps p-p
1.6
4.3
ps rms
GR-253-
OC-3/STS-3
155 MHz
12 kHz to
1.3 MHz
0.1 UI p-p = 643 ps
*
16.0
46.3
ps p-p
0.01 UI rms = 64.3 ps
1.6
4.6
ps rms
OC-12/STS-12
622 MHz
12 kHz to 5 MHz 0.1 UI p-p = 161 ps
*
16.1
42.4
ps p-p
0.01 UI p-p = 16.1 ps
1.6
4.2
ps rms
OC-48/STS-48
2.5 GHz
5 kHz to 20 MHz 1.5 UI p-p = 600 ps
*
28.9
77.4
ps p-p
-2.9
7.7
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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