DC338A-A datasheet, PDF - EEWORLD Datasheet

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DC338A-A: Descriptionboard eval ltc1563-2; CategoryDevelopment board/suite/development tools; File Size188KB，8 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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DC338A-A Overview

board eval ltc1563-2

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DEMO MANUAL DC338A

Universal Lowpass Filter Board

LTC1563 Active RC

Lowpass Filter

DESCRIPTIO

Demonstration board DC338 features the LTC

1563

family of universal lowpass filter building blocks. The

LTC1563-2 and LTC1563-3 form a family of easy-to-use

active RC lowpass filters with rail-to-rail input and output

operation and low DC offset. The parts are suitable for use

in systems with resolutions of up to 16-bits.

Demonstration board DC338A-A has the LTC1563-2

installed. The LTC1563-2 with six

equal valued resistors

gives a unity-gain Butterworth response.

Demonstration board DC338A-B has the LTC1563-3

installed. The LTC1563-3 with six

equal valued resistors

gives a unity-gain Bessel response.

The value of the six resistors sets the cutoff frequency for

either filter and is calculated by this simple formula:

R = 10k • (256kHz/f

); where f

is the desired cutoff

frequency

TYPICAL PERFORMANCE CHARACTERISTICS AND BOARD PHOTO

Frequency Response

–10

–20

GAIN (dB)

R = 10k

= 256kHz

R = 10M

= 256Hz

–30

–40

–50

–60

–70

DC338A

–80

100

100k

10k

FREQUENCY (Hz)

1563 TA02

U W

By simply using

different valued resistors,

filters with gain

and other response types are achieved. A specific gain

), f

and Q requirement is met with a unique set of three

resistors. To design these filters use Linear Technology’s

FilterCAD

filter design software. FilterCAD is a powerful,

yet easy to use, program available free of charge from the

LTC website (www.linear-tech.com). It is also available on

CD-ROM.

This board is intended for use in evaluating simple, all pole

lowpass filters using the LTC1563 family of parts. The

filter complexity ranges from 4th to 6th order. The refer-

ence designators on the board correspond directly with

the schematics produced with Linear Technology’s

FilterCAD filter design program. With FilterCAD, the

design of filters is a simple process. With the LTC1563 and

this demonstration board, filter evaluation and integration

are also simple.

, LTC and LT are registered trademarks of Linear Technology Corporation.

FilterCAD is a trademark of Linear Technology Corporation.

Demo Board

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