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| 型号： | LTC1164ACSW |
| 厂商： | Linear Technology |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC FILTER BUILDING BLOCK 24-SOIC |
| 标准包装： | 32 |
| 滤波器类型： | 通用开关电容器 |
| 频率 - 截止或中心： | 20kHz |
| 滤波器数： | 4 |
| 滤波器阶数： | 8th |
| 电源电压： | ±2.37 V ~ 8 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC |
| 包装： | 管件 |
LTC1164
11
1164fa
Mode 3A
This is an extension of Mode 3 where the highpass and
lowpass output are summed through two external resis-
tors RH and RL to create a notch. This is shown in Figure
10. Mode 3A is more versatile than Mode 2 because the
notch frequency can be higher or lower than the center
frequency of the 2nd order section. The external op amp of
Figure 10 is not always required. When cascading the
sections of the LTC1164, the highpass and lowpass
outputs can be summed directly into the inverting input of
the next section. The topology of Mode 3A is useful for
elliptic highpass and notch filters with clock to cutoff
frequency ratios higher than 100:1. This is often required
to extend the allowed input signal frequency range and to
avoid premature aliasing.
When the internal clock-to-center frequency ratio is set at
50:1, the design equations for Q and bandpass gain are
different from the 100:1 case.
Figure 9. Mode 2: 2nd Order Filter Providing Notch, Bandpass, Lowpass
ODES OF OPERATIO
U
W
LTC1164 MOO04
R3
R4
R2
NS
BP
LP
R1
1/4 LTC1164
fo =
1 +
R3/R1;
; HOLP =
HOBP = –
MODE 2 (100:1):
fCLK
100
–
+
–
Σ
∫
VIN
R3
R2
R4
; fn =
; Q =
; THEN CALCULATE R1 TO SET THE DESIRED GAIN
R3 =
R2
NOTE: THE 50:1 EQUATIONS FOR MODE 2 ARE DIFFERENT FROM THE EQUATIONS
FOR MODE 2 OPERATION OF THE LTC1059, LTC1060 AND LTC1061. START WITH
fo, CALCULATE R2/R4, SET R4; FROM THE Q VALUE, CALCULATE R3:
fCLK
50
; fn =
; Q =
fCLK
50
R3/R1
1 – (R3/16R4)
+
1.005
Q
R2
R4
R2
16R4
fo =
1 +
MODE 2 (50:1):
fCLK
50
R2
R4
1 + R2
R4
; HON1(f → 0) =
–R2/R1
1 + (R2/R4)
; HOLP =
–R2/R1
1 + (R2/R4)
–R2/R1
1 + (R2/R4)
HON1 (f → 0) =
– R2/R1
1 + (R2/R4)
1.005 (
√1 + R2/R4)
(R2/R3) – (R2/16R4)
= – R2/R1
HON2 f →
fCLK
2
()
= – R2/R1
; HON2 f →
fCLK
2
()
Figure 10. Mode 3A: 2nd Order Filter Providing Highpass, Bandpass, Lowpass, Notch
LTC1164 MOO05
HOBP = –
HOLP –
NOTE: THE 50:1 EQUATIONS FOR MODE 3A ARE DIFFERENT FROM THE EQUATIONS
FOR MODE 3A OPERATION OF THE LTC1059, LTC1060 AND LTC1061. START WITH
fo, CALCULATE R2/R4, SET R4; FROM THE Q VALUE, CALCULATE R3:
; fn =
fCLK
50
R3/R1
1 – (R3/16R4)
fo =
MODE 3A (50:1):
MODE 3A (100:1):
fCLK
50
R2
R4
R1
RH
RL
RG
RL
RG
RH
RG
RL
HOHP
; THEN CALCULATE R1 TO SET
THE DESIRED GAIN
R3 =
R2
+
1.005
Q
R2
R4
R2
16R4
; HOLP(f = 0) = – R4/R1
R4/R1;
HOLP = –
HON (f = fo) = Q
HON1(f → 0) =
=
; HON2 f →
fCLK
2
()
= –R2/R1
; HOHP f →
; fn =
fCLK
100
fo =
fCLK
100
R2
R4
R2
R4
R3
R2
RH
RL
; HOHP = – R2/R1; HOBP = –R3/R1
fCLK
2
(
)
(
)
R3
R4
R2
HP
S
BP
LP
NOTCH
EXTERNAL OP AMP OR
INPUT OP AMP OF THE
LTC1164, SIDE A, B, C, D
R1
AGND
1/4 LTC1164
–
+
–
Σ
∫
VIN
RH
RL
RG
CC
–
+
; Q =
1.005 (√R2/R4)
(R2/R3) – (R2/16R4)
×
R2
R1
RG
RH
×
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| LTC1164ACSW#PBF | 功能描述:IC FILTER BUILDING BLOCK 24-SOIC 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) |
| LTC1164ACSW#TR | 功能描述:IC FILTER LP 2ND ORD QUAD 24SOIC 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) |
| LTC1164ACSW#TRPBF | 功能描述:IC FILTER BUILDING BLOCK 24-SOIC 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) |
| LTC1164AM | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Power, Low Noise, Quad Universal Filter Building Block |
| LTC1164AMJ | 制造商:Linear Technology 功能描述:Active Filter Quad SW-CAP UNIV 8th Order 20kHz 24-Pin CDIP |
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