參數(shù)資料
型號(hào)： LT1568IGN#TR
廠商： Linear Technology
文件頁(yè)數(shù)： 2/16頁(yè)
文件大?。?/td> 0K
描述： IC BLOCK BUILD FLTR LONOS 16SSOP
標(biāo)準(zhǔn)包裝： 2,500
濾波器類型： 帶通
頻率 - 截止或中心： 200kHz
濾波器數(shù)： 2
濾波器階數(shù)： 2nd
電源電壓： 2.7 V ~ 11 V，±2.7 V ~ 5.5 V
安裝類型： 表面貼裝
封裝/外殼： 16-SSOP（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 16-SSOP
包裝： 帶卷 (TR)
LT1568
10
1568f
APPLICATIO S I FOR ATIO
WU
UU
The LT1568 has been designed to make the implementa-
tion of high frequency filtering functions very easy. Inter-
nal low noise amplifiers and capacitors are configured in
a topology that requires only three external resistors to
implement a 2nd order filter stage. The two 2nd order
stages can be used independently or cascaded for simple
4th order filter functions. With two stages integrated on
the same die, the matching of the independent sections is
better than what can be achieved with separate amplifier
components.
OPERATING WITH SINGLE OR DUAL SUPPLIES
Figure 1 shows the recommended connection of an analog
ground plane with the LT1568 biased from either symmetri-
cal dual (
±V) power supplies or a single supply. Connec-
tion of the two GND pins is important to properly DC bias
the internal amplifiers. The use of a ground plane helps to
minimize noise and stray components to preserve signal
integrity and maintain frequency response accuracy.
When biasing from a dual supply, it is recommended that
a Schottky diode clamp (BAT54S) be added as shown.
These diodes ensure that improper supply voltages,
through either reverse polarity or power-up sequencing,
do not damage the LT1568.
SIMPLE FILTER IMPLEMENTATIONS
The basic 2nd order filter block of the LT1568, with three
external resistors connected as shown in the Block Dia-
gram, has the following lowpass transfer function:
e
DC
f
s
f
Q
sf
OUT
IN
GAIN
O
=
π
()
+ π
+π
()
–
2
where eOUT is either OUTA or OUTB,
DC
R
f
RR
C
GAIN
O
==
π
2
1
22
3
1
2
,
and
Q
CC
R
f
CR
R
C
R
O
=
π
+
()+
[]
21
2
1
2
3
11
2
3
2
3
2
1
2
–
The typical values of the internal capacitors are:
C1= 105.7pF
C2 = 141.3pF
These filter functions assume ideal amplifiers.
Dual Supply Power and Ground Connections
Single Supply Power and Ground Connections
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V+
INVA
SA
OUTA
GNDA
NC
V–
V+
INVB
SB
OUTB
GNDB
EN
V–
LT1568
BAT54S
V+
V–
0.1
F
0.1
F
SINGLE POINT
SYSTEM GROUND
1568 F01a
ANALOG
GROUND
PLANE
DIGITAL GROUND PLANE
(IF ANY)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V+
INVA
SA
OUTA
GNDA
NC
V–
V+
INVB
SB
OUTB
GNDB
EN
V–
LT1568
V+
0.1
F
0.1
F
SINGLE POINT
SYSTEM GROUND
1568 F01b
ANALOG
GROUND
PLANE
DIGITAL GROUND PLANE
(IF ANY)
Figure 1. Dual and Single Supply and Ground Plane Connections
相關(guān)PDF資料
PDF描述
LT1568IGN IC BLOCK BUILD FLTR LONOS 16SSOP
VE-J4V-IW-B1 CONVERTER MOD DC/DC 5.8V 100W
VE-2VV-IY-F2 CONVERTER MOD DC/DC 5.8V 50W
VE-J40-IW-B1 CONVERTER MOD DC/DC 5V 100W
VE-J1W-IW-B1 CONVERTER MOD DC/DC 5.5V 100W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT-1570-113-012 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk
LT-1570-113-012-XAA1 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk
LT-1570-113-024 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk
LT-1570-113-024-XAA1 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk
LT-1570-113-024-XDD2 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk
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