Datasheet

24
LTC1562
1562fa
TYPICAL APPLICATIONS
U
(Advanced)
R
Q1
30.1k
R
Q3
34k
R
IN3
31.6k
R
IN1
48.7k
V
IN
R
Q2
13k
R
IN2
37.4k
R
IN4
32.4k
C
IN2
24pF
R
Q4
11.5k
R22 57.6k
R24 32.4k
0.1µF
V
OUT
–5V5V
R21 31.6k
R23 31.6k
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
IN4
10pF
1562 TA12a
C
IN3
18pF
SCHEMATIC INCLUDES PIN NUMBERS FOR 20-PIN PACKAGE.
PINS 4, 7, 14, 17 (NOT SHOWN) ALSO CONNECT TO V
–
8th Order 50kHz Lowpass Elliptic Filter
with 100dB Stopband Attenuation
8th Order 100kHz Elliptic Bandpass Filter
R
Q1
86.6k
R
Q3
71.5k
R
IN3
294k
C
IN3
18pF
R
IN1
95.3k
C
IN1
5.6pF
V
IN
R
Q2
84.5k
R
IN2
93.1k
R
FF2
301k
R
IN4
95.3k
R
FF4
332k
R
Q4
82.5k
R22 10k
R24 9.53k
0.1µF
V
OUT
–5V5V
R21 10.7k
R23 10k
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
1562 F13a
SCHEMATIC INCLUDES PIN NUMBERS FOR 20-PIN PACKAGE.
PINS 4, 7, 14, 17 (NOT SHOWN) ALSO CONNECT TO V
–
FREQUENCY (kHz)
USES THREE R-C UNIVERSAL NOTCHES AT f
N
= 133kHz, 167kHz, 222kHz.
DETAILED DESCRIPTION IN LINEAR TECHNOLOGY DESIGN NOTE 195.
WIDEBAND OUTPUT NOISE 60µV
RMS
–120
–60
–80
–100
20
0
–20
–40
1562 TA12b
GAIN (dB)
10
500
100
Amplitude Response
Amplitude Response
FREQUENCY (kHz)
25
–90
GAIN (dB)
–70
–80
–20
–30
–40
–50
–60
–10
0
100 175
1562 TA13b
10