Datasheet

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