參數資料
型號: LT1394CMS8
廠商: LINEAR TECHNOLOGY CORP
元件分類: 運動控制電子
英文描述: 7ns, Low Power, Single Supply, Ground-Sensing Comparator
中文描述: COMPARATOR, 4000 uV OFFSET-MAX, 7 ns RESPONSE TIME, PDSO8
封裝: PLASTIC, MSOP-8
文件頁數: 16/16頁
文件大?。?/td> 213K
代理商: LT1394CMS8
16
LT1394
1394f LT/TP 0499 4K PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1998
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
G
FAX: (408) 434-0507
G
www.linear-tech.com
TYPICAL APPLICATIO
N
U
Voltage-Controlled Crystal Oscillator (VCXO)
Figure 20, a variant of the basic crystal oscillator, permits
voltage tuning the output frequency. Such voltage-con-
trolled crystal oscillators (VCXO) are often employed
where slight variation of a stable carrier is required. This
example is specifically intended to provide a 4
×
NTSC
sub-carrier tunable oscillator suitable for phase locking.
The LT1394 is set up as a crystal oscillator, operating
similarly to Figure 3 (a). The varactor diode is biased from
the tuning input. The tuning network is arranged so a 0V
to 5V drive provides a reasonably symmetric, broad tuning
range around the 14.31818MHz center frequency. The
indicated selected capacitor sets tuning bandwidth. It
should be picked to complement loop response in phase
locking applications. Figure 21 is a plot of tuning input
voltage versus frequency deviation. Tuning deviation from
the 4
×
NTSC 14.31818MHz center frequency exceeds
±
240ppm for a 0V to 5V input.
PART NUMBER
LT1016
LT1116
LT1671
LT1720
DESCRIPTION
UltraFast Precision Comparator
12ns Single Supply Ground-Sensing Comparator
Fast Single Supply Comparator
UltraFast Dual Single Supply Comparator
COMMENTS
Industry Standard 10ns Comparator
Single Supply Version of LT1016
60ns, 450
μ
A Single Supply Comparator
Dual 4.5ns, 4mA Single Supply Comparator
RELATED PARTS
Figure 21. Control Voltage vs Output Frequency for Figure 15.
Tuning Deviation from Center Frequency Exceeds
±
240ppm
INPUT VOLTAGE (V)
0
F
2
4
5
9
8
7
6
5
4
3
2
1
0
1394 F21
1
3
14.314.0MHz
14.31818MHz
14.3217MHz
Figure 20. A 4
×
NTSC Sub-Carrier Voltage-Tunable Crystal Oscillator. Tuning Range
and Bandwidth Accommodate Variety of Phase Locked Loops
1394 F20
+
LT1394
5V
390
200pF
* 1% FILM RESISTOR
** NORTHERN ENGINEERING LABS C-2350N-14.31818MHz
*** C SELECT SETS TUNING BANDWIDTH. SET TO COMPLEMENT
LOOP RESPONSE IN PHASE LOCKING APPLICATIONS
VARACTOR DIODE
5V
FREQUENCY
OUTPUT
3.9k*
V
0V TO 5V
1M
MV-209
2k
2k
100pF
15pF
Y1**
100pF
C SELECT***
0.047
μ
F
1M
1M
1M*
1N4148
LT1004-2.5
47k*
1k*
相關PDF資料
PDF描述
LT1394IS8 7ns, Low Power, Single Supply, Ground-Sensing Comparator
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LT1394 7ns, Low Power, Single Supply, Ground-Sensing Comparator(7ns, 低功耗,單電源,地電平敏感比較器)
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