ltc1164-8 Linear Technology Corporation, ltc1164-8 Datasheet - Page 9

• Manufacturer Part Number: ltc1164-8
• Description: Ultraselective, Low Power 8th Order Elliptic Bandpass Filter With Adjustable Gain
• Manufacturer: Linear Technology Corporation

APPLICATIONS
Printed Circuit Layout
For optimum filter performance, an LTC1164-8 should be
operating on a printed circuit board that has been laid out
for precision analog signal processing circuits. On a
printed circuit board, an LTC1164-8 should be surrounded
with an adequate analog signal ground plane and its power
supply pins bypassed to ground with 0.1μF capacitors.
The ground plane of an LTC1164-8 and any digital ground
plane should preferably meet at a single point on a system
ground (star system ground).
The following external filter connections should be one
inch or less:
TYPICAL APPLICATIONS
N Package
1N4148
Resistor R
Pin 14 to Pin 7
5V
V
IN
IN
0.1μF
340k
R
to Pin 2
U
IN
V
R
1/(2π × R1 × C1) ≤ f
OUT
A
IN
= 340k/GAIN; f
1
2
3
4
5
6
7
= AVERAGE OF ABS [V
INFORMATION
U
LTC1164-8
100k
R2
5k
CENTER
CENTER
U
W
14
13
12
11
10
9
8
= f
/10; 1/(2π × R2 × C2) ≤ f
PEAK
CLK
N
C2
100kHz
Tone Detector and Average Value Circuit
/100; 1/(2π × R
f
× SIN (2π × f
CLK
–
+
1/2 LT1413
U
–5V
5V
0.1μF
5k
4
11
CENTER
F
× C
CENTER
0.1μF
0.1μF
F
) ≥ 10 × f
1N4148
× t)], ±10% FROM 1V
–5V
/25; R2 × C2 = R3 × C3
CENTER
Any signal or power supply printed circuit traces should
be at least 0.2 inches away from the above mentioned
connections (this rule applies also to the routing of the
printed circuit trace originating from a clock source in a
digital circuit and terminating at a clock input pin of an
LTC1164-8). Operating an LTC1164-8 in an IC socket is
not recommended.
SW Package
B
–
+
1/2 LT1413
Pin 9 to the Inverting Node of an External Op Amp
Ground Pins 1, 3, 5, 6, 8, 10 and 13
Resistor R
Pin 16 to Pin 8
Pin 9 to the Inverting Node of External Op Amp
Ground Pins 1, 3, 5, 6, 7, 10, 11, 13 and 15
61.9k
R
C
F
F
P-P
TO 7V
100k
R3
5k
P-P
IN
C1
to Pin 2
C3
10k
R1
–
+
1/2 LT1413
5k
–
+
1/2 LT1413
5k
5k
1N458
1N458
LTC1164-8
LTC1164-8 • TA03
V
OUT
A
B
11648fb
9