Datasheet > LTC1069-7

LTC1069-7

更新时间： 2023-12-20 18:46:08

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
10页	163K
描述
线性相位 8 阶低通滤波器

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LTC1069-7 数据手册

LTC1069-7

Linear Phase

8th Order Lowpass Filter

cutoff frequency of the LTC1069-7 is set by an external

clock and is equal to the clock frequency divided by 25.

The ratio of the internal sampling frequency to the cutoff

frequency is 50:1 that is, the input signal is sampled

twice per clock cycle to lower the risk of aliasing. The

LTC1069-7 can be operated from a single 5V supply up

to dual 5V supplies.

FEATURES

8th Order, Linear Phase Filter in SO-8 Package

Raised Cosine Amplitude Response

–43dB Attenuation at 2× f

Wideband Noise: 140μV

CUTOFF

RMS

Operates from Single 5V Supply to

5V ꢀower Supplies

Clock-Tunable to 200kHz with 5V Supplies

Clock-Tunable to 120kHz with Single 5V Supply

The gain and phase response of the LTC1069-7 can be

used in digital communication systems where pulse

shaping and channel bandwidth limiting must be carried

out. Any system that requires an analog ﬁlter with linear

phase and sharper roll off than conventional Bessel ﬁlters

can use the LTC1069-7.

APPLICATIONS

Digital Communication Filter

The LTC1069-7 has a wide dynamic range. With 5V

Antialiasing Filter with Linear ꢀhase

supplies and an input range of 0.1V

to 2V

, the

RMS

Smoothing Filters

signal-to-(noise+THD)ratiois≥ 60dB.Thewidebandnoise

oftheLTC1069-7is140μV .UnlikeotherLTC1069-Xﬁlters,

RMS

DESCRIPTION

the typical passband gain of the LTC1069-7 is equal to –1V/V.

The LTC^®1069-7 is a monolithic, clock-tunable, linear

phase, 8th order lowpass ﬁlter. The amplitude response

of the ﬁlter approximates a raised cosine ﬁlter with an

alphaofone. Thegainatthecutofffrequencyis–3dBand

the attenuation at twice the cutoff frequency is 43dB. The

The LTC1069-7 is available in an SO-8 package.

Otherﬁlterresponseswithlowerpower/speedspeciﬁcations

can be obtained. ꢀlease contact LTC Marketing.

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

TYPICAL APPLICATION

Frequency Response

Single 5V Supply, Linear Phase 100kHz Lowpass Filter

AGND

OUT

–10

–20

–30

–40

–50

–60

–70

–

0.47μF

0.1μF

LTC1069-7

= 2.5MHz

1069-7 TA01

CLK

100

1000

FREQUENCY (kHz)

1069-7 TA02

10697fa

12 3 4 5 6 7...10

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