LTC1066-1CSW#TR Linear Technology, LTC1066-1CSW#TR Datasheet - Page 16

• Manufacturer Part Number: LTC1066-1CSW#TR
• Description: IC FILTER LP 8TH ORDER 18SOIC
• Manufacturer: Linear Technology

Specifications of LTC1066-1CSW#TR

• Filter Type: Bessel, Lowpass Switched Capacitor
• Frequency - Cutoff Or Center: 50kHz
• Number Of Filters: 1
• Max-order: 8th
• Voltage - Supply: 4.75 V ~ 16 V, ±2.375 V ~ 8 V
• Mounting Type: Surface Mount
• Package / Case: 18-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

LTC1066-1
16
TYPICAL APPLICATIO
f
f
FOR CUTOFF FREQUENCIES 2kHz TO 5kHz, SET R
C
FOR CUTOFF FREQUENCIES <2kHz, SET R1 + R2 = R
FOR EXAMPLE:
IF THE CUTOFF FREQUENCY OF LTC1066-1 IS 500Hz, THEN
f
2πR
R1 + R2 = 80.6k, R1 = 4.22k AND R2 = 76.8k ROUNDED TO NEAREST 1% VALUE.
C2 = 0.027µF ROUNDED TO NEAREST STANDARD VALUE.
NOTE: R
2π(R1 + R2)C1
CUTOFF
–3dB
–3dB
F
= 1µF AND R1 + R2 ≤ 2k
1
F
C
= 2•f
= 1000Hz
F
1
=
= 2Hz, SET R
F
SHOULD BE ≤100k TO MINIMIZE DC OFFSET TO ±5.5mV
f
CLK
CUTOFF
50
,
= 0.707•f
2πR
(f
2ND ORDER ANTI-ALIASING FILTER)
1
–3dB
F
F
C
= 80.6k, C
F
IS THE –3dB FREQUENCY OF THE
=
–3dB
f
CUTOFF
250
, R2 = 17.946•R1, C2 = 10•C1
F
= 1µF AND C1 = 0.0027µF
–7.5V
U
F
V
= 20k,
IN
DC Accurate Lowpass Filter with Input Anti-Aliasing
F
2ND ORDER BUTTERWORTH ANTI-
ALIASING FILTER PROVIDES –68dB
ATTENUATION TO INPUTS AT 2f
20Ω
R1
0.1µF
R2
(f
CLK
C2
7.5V
f
CLK
0.1µF
≤ 250kHz)
CLK
C1
C
F
1
2
3
4
5
6
7
8
9
OUT A
–IN A
+IN A
V
V
CONNECT 1
FILTER
50/100
CLK
–
+
OUT
LTC1066-1
R
F
CONNECT 2
FILTER
COMP 2
COMP 1
OUT B
+IN B
GND
V
V
IN
+
–
18
17
16
15
14
13
12
11
10
0.1µF
7.5V
20Ω
0.1µF
1066-1 TA05
V
–7.5V
OUT
10661fa