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参数资料
| 型号： | LT1568CGN |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 运动控制电子 |
| 英文描述： | Very Low Noise, High Frequency Active RC, Filter Building Block |
| 中文描述： | DUAL CONTINUOUS TIME FILTER, BUTTERWORTH/BESSEL/CHEBYSHEV, LOWPASS/BANDPASS, PDSO16 |
| 封装： | 0.150 INCH, PLASTIC, SSOP-16 |
| 文件页数： | 10/16页 |
| 文件大小： | 271K |
| 代理商： | LT1568CGN |
LT1568
10
1568f
APPLICATIU
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.
W
U
U
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
e
DC
f
s
f
Q
s
f
OUT
IN
GAIN
π
2
O
O
O
=
π
(
+
)
+
π
)
–
2
2
2
2
2
where e
OUT
is either OUTA or OUTB,
DC
R
R
f
R
R
C
C
GAIN
O
=
=
π
2
1
1
2
2
3
1
2
,
and
Q
C
2
C
3
R
R
R
R
]
f
C
R
[
R
(
R
R
C
R
R
O
=
π
+
)
+
2
1
2
1
2
3
1
1
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
OUTA
GNDA
NC
V
–
V
+
INVB
SB
OUTB
OUTB
GNDB
EN
V
–
LT1568
BAT54S
V
+
V
–
0.1
μ
F
0.1
μ
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
OUTA
GNDA
NC
V
–
V
+
INVB
SB
OUTB
OUTB
GNDB
EN
V
–
LT1568
V
+
0.1
μ
F
0.1
μ
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
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1568CGN#PBF | 功能描述:IC FILTER BUILDING BLOCK 16SSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 滤波器 - 有源 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1,000 系列:- 滤波器类型:连续时间，带通低通 频率 - 截止或中心:150kHz 滤波器数:4 滤波器阶数:8th 电源电压:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) |
| LT1568CGN#TR | 功能描述:IC BLOCK BUILD FLTR LONOS 16SSOP RoHS:否 类别:集成电路 (IC) >> 接口 - 滤波器 - 有源 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1,000 系列:- 滤波器类型:连续时间，带通低通 频率 - 截止或中心:150kHz 滤波器数:4 滤波器阶数:8th 电源电压:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) |
| LT1568CGN#TRPBF | 功能描述:IC BLOCK BUILD FLTR LONOS 16SSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 滤波器 - 有源 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1,000 系列:- 滤波器类型:连续时间，带通低通 频率 - 截止或中心:150kHz 滤波器数:4 滤波器阶数:8th 电源电压:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) |
| LT1568CGNPBF | 制造商:LINEAR_DIMENSIONS 制造商全称:LINEAR_DIMENSIONS 功能描述:Very Low Noise, High Frequency Active RC, Filter Building Block |
| LT1568IGN | 功能描述:IC BLOCK BUILD FLTR LONOS 16SSOP RoHS:否 类别:集成电路 (IC) >> 接口 - 滤波器 - 有源 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1,000 系列:- 滤波器类型:连续时间，带通低通 频率 - 截止或中心:150kHz 滤波器数:4 滤波器阶数:8th 电源电压:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) |
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