LTC1562 Linear Technology, LTC1562 Datasheet - Page 25

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

TYPICAL APPLICATIONS
– 20
– 80
– 90
–10
– 30
– 40
– 50
– 60
–70
10
0
5
Amplitude Response
10
V
FREQUENCY (kHz)
V
IN
+
R
140k
IN1A
R
69.8k
IN1B
C
390pF
0.1 F
U
IN1
1562 TA14b
R
R21 324k
R23 196k
R
Q1
Q3
(Advanced)
95.3k
392k
9th Order 22kHz Lowpass Elliptic Filter
SCHEMATIC INCLUDES PIN NUMBERS FOR 20-PIN PACKAGE.
PINS 4, 7, 14, 17 (NOT SHOWN) ALSO CONNECT TO V
50
V
–
10
1
2
3
5
6
8
9
INVB
V1B
V2B
V
SHDN
V2A
V1A
INVA
+
LTC1562
C
IN2
33pF
C
IN4
R
AGND
IN2
INVC
INVD
56pF
V2D
V1D
V1C
V2C
V
249k
–
20
19
18
16
15
13
12
11
– 40
– 45
– 50
– 55
– 80
– 85
– 90
– 60
– 65
–70
–75
R22 226k
R
R
R
R24 649k
Q4
IN4
Q2
66.5k
1
182k
301k
V
V
IN
S
= 5V
–
Noise + THD vs Frequency
= 1.65V
1562 F14a
27pF
536k
C
R
IN3
IN3
RMS
FREQUENCY (kHz)
= 4.6V
0.1 F
V
OUT
P-P
V
TO
PIN 10
–
10
1562 TA14c
LTC1562
20
25