ATTENUATION TO INPUTS AT " />
參數(shù)資料
型號: LTC1066-1CSW#TRPBF
廠商: Linear Technology
文件頁數(shù): 8/20頁
文件大?。?/td> 0K
描述: IC FILTR 8TH ORDR LOWPASS 18SOIC
標(biāo)準(zhǔn)包裝: 1,000
濾波器類型: 貝塞爾,低通開關(guān)電容器
頻率 - 截止或中心: 50kHz
濾波器數(shù): 1
濾波器階數(shù): 8th
電源電壓: 4.75 V ~ 16 V,±2.375 V ~ 8 V
安裝類型: 表面貼裝
封裝/外殼: 18-SOIC(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 18-SOIC
包裝: 帶卷 (TR)
LTC1066-1
16
10661fa
1066-1 TA05
7.5V
–7.5V
7.5V
2ND ORDER BUTTERWORTH ANTI-
ALIASING FILTER PROVIDES –68dB
ATTENUATION TO INPUTS AT 2fCLK
–7.5V
VOUT
VIN
fCLK
CF
RF
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
C2
OUT A
–IN A
+IN A
V
V+
CONNECT 1
FILTEROUT
50/100
CLK
V+
OUT B
+IN B
GND
FILTERIN
COMP 2
CONNECT 2
COMP 1
V
0.1
F
0.1
F
0.1
F
LTC1066-1
20
20
R1
R2
0.1
F
C1
fCUTOFF =
,
=
fCLK
50
fCUTOFF
250
1
2
πRFCF
= 2Hz, SET RF = 80.6k, CF = 1F AND C1 = 0.0027F
1
2
πRFCF
f–3dB = 2fCUTOFF (f–3dB IS THE –3dB FREQUENCY OF THE
2ND ORDER ANTI-ALIASING FILTER)
1
2
π(R1 + R2)C1
= 0.707f–3dB, R2 = 17.946R1, C2 = 10C1
FOR CUTOFF FREQUENCIES 2kHz TO 5kHz, SET RF = 20k,
CF = 1F AND R1 + R2 ≤ 2k
FOR CUTOFF FREQUENCIES <2kHz, SET R1 + R2 = RF
FOR EXAMPLE:
IF THE CUTOFF FREQUENCY OF LTC1066-1 IS 500Hz, THEN
f–3dB = 1000Hz
R1 + R2 = 80.6k, R1 = 4.22k AND R2 = 76.8k ROUNDED TO NEAREST 1% VALUE.
C2 = 0.027
F ROUNDED TO NEAREST STANDARD VALUE.
NOTE: RF SHOULD BE ≤100k TO MINIMIZE DC OFFSET TO ±5.5mV
DC Accurate Lowpass Filter with Input Anti-Aliasing
(fCLK ≤ 250kHz)
TYPICAL APPLICATIO
U
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