参数资料
型号: LTC1068-50CG#TR
厂商: Linear Technology
文件页数: 9/30页
文件大小: 0K
描述: IC FILTER BUILDG BLK QUAD 28SSOP
标准包装: 2,000
滤波器类型: 通用开关电容器
频率 - 截止或中心: 50kHz
滤波器数: 4
滤波器阶数: 8th
电源电压: 3.14 V ~ 11 V,±3.14 V ~ 5.5 V
安装类型: 表面贴装
封装/外壳: 28-SSOP(0.209",5.30mm 宽)
供应商设备封装: 28-SSOP
包装: 带卷 (TR)
LTC1068 Series
17
1068fc
APPLICATIONS INFORMATION
A Surface Mount Printed Circuit Layout
A very compact surface mount printed circuit layout can
be designed with 0603 size surface mount resistors,
capacitors and a 28-pin SSOP of the LTC1068 product
family. An example of a printed circuit layout is shown
in the following figures for an 8th order elliptic bandpass
filter. The total board area of this 8th order filter is 1" by
0.8". No attempt was made to design the smallest possible
printed circuit layout.
70kHz Elliptic Bandpass Filtter, fCENTER = fCLK/25 (Maximum fCENTER is 80kHz, VS = ±5V)
Gain vs Frequency
INV B
INV C
28
1
HPB/NB
HPC/NC
27
2
SB
NC
SC
24
5
R21 4.99k
R22 4.99k
BPB
BPC
26
3
R31 24.9k
R32 107k
LPA
LPD
20
9
R43 43.2k
R44 17.4k
BPA
BPD
19
10
R33 59k
R34 63.4k
HPA/NA
HPD/ND
18
11
INV A
INV D
17
16
15
12
13
14
R23 4.99k
R24 7.5k
LPB
LPC
25
4
R41 20.5k
R51
4.99k
RH2 11.3k
R11 29.4k
VIN
R64 10k
R62 56.2k
RH1 28k
RH3 15.4k
VOUT
AGND
V
23
6
V+
22
7
SA
SD
NC
CLK
21
8
5V
–5V
1.75MHz
1068 TA04
U1
LTC1068-25
C1
0.1F
C2
0.1F
R54
4.99k
R52
4.99k
RL3
45.3K
R61 11.3k
RL2 23.2k
FREQUENCY (kHz)
20
GAIN
(dB)
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
40
60
70
1068 TA05
30
50
80
90 100
FilterCAD Custom Inputs for fC = 70kHz
2nd ORDER SECTION
f0 (kHz)
Q
fN (kHz)
TYPE
MODE
B
67.7624
5.7236
58.3011
HPN
2b
C
67.0851
20.5500
81.6810
LPN
1bn
A
73.9324
15.1339
81.0295
LPN
2n
D
73.3547
16.3491
BP
2b
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