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10
LTC1164-6
11646fa
U
S
A
O
PPLICATI
TYPICAL
8th Order Elliptic Lowpass Filter (fCLK/fC) = 100:1
8th Order Linear Phase Lowpass Filter (fCLK/fC) = 160:1
8th Order 20kHz Cutoff, Elliptic Filter Operating with a Single 5V Supply and Driving 1k, 1000pF Load
THD + Noise vs Frequency
Gain vs Frequency
FREQUENCY (kHz)
1
THD
+
NOISE
(dB)
5
1164-6 TA05
–40
–45
–50
–55
–60
–65
–70
–75
–80
–85
–90
10
VS = SINGLE 5V
IS = 5mA, 16TH ORDER
ELLIPTIC LOWPASS
VIN = 0.5VRMS
fCLK = 540kHz
fC = 10kHz
FREQUENCY (kHz)
1
GAIN
(dB)
10
1164-6 TA04
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
30
VS = SINGLE 5V
IS = 5mA, 16TH ORDER
ELLIPTIC LOWPASS
fCLK = 540kHz
fCUTOFF = 10kHz
Single 5V, 16th Order Lowpass Filter fCUTOFF = 10kHz
1
2
3
4
5
6
7
14
13
12
11
10
9
8
VIN
5V
fCLK
1164-6 TA03
LTC1164-6
1
F
15k
10k
1
2
3
4
5
6
7
14
13
12
11
10
9
8
IC1
C1
0.01
F
R1
789
5V
0.1
F
1k
5V
0.1
F
5V
IC2
LTC1164-6
R2
7.89k
C2
0.001
F
VOUT
+
VS = SINGLE 5V, IS = 5mA TYP
16TH ORDER LOWPASS FILTER
FIXED fCUTOFF, fCLK = 540kHz
fCUTOFF = 10kHz
(fCLK/fC) = 54:1
1/2
πR1C1 = 1/2πR2C2 = 2fCUTOFF
1
2
3
4
5
6
7
14
13
12
11
10
9
8
LTC1164-6
VIN
VOUT
fCLK
= 1MHz
5V
NOTES:
1. TOTAL SUPPLY CURRENT IS = 4mA
(EXCLUDING OUTPUT LOAD CURRENT)
2. FLAT PASSBAND UP TO 18kHz,
f–3dB = 20kHz
3. THD + NOISE
≤ –70dB,
1VP-P ≤ VIN ≤ 3VP-P, fIN = 1kHz
1164-6 TA09
1k
–
+
510pF
LT1200
0.1
F
5V
10k
6.65k
0.1
F
10k
51.1k
5V
2
3
4
7
5V
1000pF
1k
1
2
3
4
5
6
7
14
13
12
11
10
9
8
LTC1164-6
VIN
VOUT
fCLK
1164-6 TA07
V –
0.1
F
0.1
F
V+
1
2
3
4
5
6
7
14
13
12
11
10
9
8
LTC1164-6
VIN
VOUT
fCLK
1164-6 TA08
V –
0.1
F
0.1
F
V+