9

LTC1164-8

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 0.1

µF 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:

N Package

Pin 14 to Pin 7

Pin 9 to the Inverting Node of an External Op Amp

Ground Pins 1, 3, 5, 6, 8, 10 and 13

SW Package

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

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.

Tone Detector and Average Value Circuit

61.9k

C1

5k

5k

R2

100k

5k

5k

1N458

R1

10k

1/2 LT1413

5V

4

11

–5V

1/2 LT1413

0.1

µF

0.1

µF

C2

1/(2

1/2 LT1413

1N458

A

B

A

5k

5k

R3

100k

LTC1164-8 • TA03

1/2 LT1413

C3

B

0.1

µF

0.1

µF

1N4148

LTC1164-8

–5V

5V

1N4148

340k

100kHz

1

2

3

4

5

6

7

14

13

12

11

10

9

8