LTC1562CG#PBF Linear Technology, LTC1562CG#PBF Datasheet - Page 17

• Manufacturer Part Number: LTC1562CG#PBF
• Description: IC FILTER UNIV RC QUAD LN 20SSOP
• Manufacturer: Linear Technology

Specifications of LTC1562CG#PBF

• Filter Type: Universal, Continuous-Time
• Frequency - Cutoff Or Center: 150kHz
• Number Of Filters: 4
• Max-order: 8th
• Voltage - Supply: 4.75 V ~ 10.5 V, ±4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TYPICAL APPLICATIONS
V
5V
IN
0.1 F
R
IN1
8th Order Bandpass Filter, Single 5V Supply,
R21 = R23 = 11.7k
R22 = R24 = 8.66k
Notes: R21 and R
the later formulas. For f
LTC1562A for minimum variation of passband gain.
Example: Center frequency f
This value gives R
R22 = R24 = 8.66k, already a standard 1% value. This gives R
R
improve the passband gain accuracy.
Quick Design Formulas for a Center Frequency f
Q2
SCHEMATIC INCLUDES PIN NUMBERS FOR 20-PIN PACKAGE.
PINS 4, 7, 14, 17 (NOT SHOWN) ALSO CONNECT TO V
– 1dB Bandwidth =
R21
R23
= R
R
R
Q1
Q3
Q4
= 63.45k, nearest 1% value 63.4k. If LTC1562A is used, resistor tolerances tighter than 1% will further
10
1
2
3
5
6
8
9
INV B
V1 B
V2 B
V
SHDN
V2 A
V1 A
INV A
Q2
+
IN1
100kHz
100kHz
LTC1562
should be rounded to the nearest standard finite-tolerance value before using these values in
= R
R
R
R
IN2
C
C
C
IN4
IN3
Center Frequency
< 100kHz, the maximum peak-to-peak passband input level is (f
IN3
AGND
INV D
INV C
V2 D
V1 D
V1 C
V2 C
2
2
C
= 82.46k, nearest 1% value 82.5k. R
V
–
of 100kHz. The formulas give R21 = R23 = 11.7k, nearest standard 1% value 11.5k.
U
10
20
19
18
16
15
13
12
11
R
R
IN1
IN2
(Basic)
1 F
R24
R
R
R22
= R
= R
Q4
Q2
–
IN3
IN4
=
=
1562 TA06a
C
C
V
100kHz
C
+ 1736kHz
100kHz
+ 634kHz
OUT
(Recommended Range 50kHz to 120kHz):
IN2
Q1
= R
14.36
R
2.56
R21
= R
Q2
IN4
Q3
= 32.4k (again already a standard 1% value).
= 65.5k, nearest 1% value 64.9k.
–10
– 20
– 30
– 40
– 50
– 60
–70
– 80
– 90
10
0
60
R
R
f
CENTER
Q1
Q2
68
= R
= R
76
C
Amplitude Response
= 100kHz
Q3
Q4
/100kHz)5V. Use
84
= 215.5k
= 286.2k
FREQUENCY (kHz)
92
100
100kHz
100kHz
108
C
C
116
1562 TA06 TABLE
124
C
C
1562 TA06b
132
100kHz
100kHz
+ 229kHz
+ 351kHz
LTC1562
140
17
1562fa