LTC1562 Linear Technology, LTC1562 Datasheet - Page 18

• Manufacturer Part Number: LTC1562
• Description: Very Low Noise/ Low Distortion Active RC Quad Universal Filter
• Manufacturer: Linear Technology

LTC1562
TYPICAL APPLICATIONS
V
18
V
IN
+
0.1 F
R
IN1
– 3dB Bandwidth =
8th Order Bandpass Filter
– 3dB BW =
Side B
R
R
R21
Sides A, C, D
R
R
R22, R23, R24
All resistor values are 1%
8th Order Bandpass (High Frequency) Filter
IN1
Q1
IN2
Q2
SCHEMATIC INCLUDES PIN NUMBERS FOR 20-PIN PACKAGE.
PINS 4, 7, 14, 17 (NOT SHOWN) ALSO CONNECT TO V
R
R21
R23
R
, R
, R
Q1
Q3
Q3
IN3
, R
, R
Q4
f
10
CENTER
IN4
1
2
3
5
6
8
9
10
INV B
V1 B
V2 B
V
SHDN
V2 A
V1 A
INV A
+
, Gain = 10
Center Frequency
LTC1562
R
R
R
IN2
IN4
IN3
AGND
INV C
INV D
V1 C
V2 C
V2 D
V1 D
10
V
–
U
20
19
18
16
15
13
12
11
f
80kHz
CENTER
4.64k
46.4k
12.4k
46.4k
46.4k
12.4k
, Gain = 10
(Basic)
0.1 F
R22
R
R
R24
–
Q2
Q4
f
90kHz
CENTER
5.23k
52.3k
15.4k
52.3k
52.3k
15.4k
1562 TA08a
V
V
OUT
–
100kHz
f
CENTER
6.34k
42.2k
10.0k
42.2k
42.2k
10.0k
f
110kHz
CENTER
5.11k
38.3k
38.3k
38.3k
8.25k
8.25k
– 20
– 30
– 40
– 50
– 60
– 70
–10
30
20
10
0
40
f
CENTER
60
f
120kHz
CENTER
Amplitude Response
5.11k
34.8k
6.98k
34.8k
34.8k
6.98k
= 100kHz
80
FREQUENCY (kHz)
100
f
130kHz
120
CENTER
5.49k
32.4k
32.4k
32.4k
5.90k
5.9k
140
160
1562 TA08b
f
140kHz
CENTER
5.62k
30.1k
5.11k
30.1k
30.1k
5.11k
180