Datasheet > LTC1069-1

LTC1069-1

更新时间： 2023-12-20 18:45:14

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
10页	141K
描述
低功率、8 阶渐进式椭圆、低通滤波器

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LTC1069-1 数据手册

LTC1069-1

Low Power, 8th Order

Progressive Elliptic,

Lowpass Filter

FEATURES

DESCRIPTION

The LTC^®1069-1 is a monolithic 8th order lowpass ﬁlter

featuringclock-tunablecutofffrequencyand2.5mApower

supplycurrentwithasingle5Vsupply.Anadditionalfeature

of the LTC1069-1 is operation with a single 3.3V supply.

8th Order Elliptic Filter in SO-8 Package

Operates from Single 3.3V to 5V Power Supplies

–20dB at 1.2f

CUTOFF

–52dB at 1.4f

CUTOFF

–70dB at 2f

CUTOFF

The cutoff frequency (f

) of the LTC1069-1 is equal

CUTOFF

Wide Dynamic Range

110μV Wideband Noise

3.8mA Supply Current with 5V Supplies

2.5mA Supply Current with Single 5V Supply

2mA Supply Current with Single 3.3V Supply

to the clock frequency divided by 100. The gain at f

CUTOFF

RMS

is –0.7dB and the typical passband ripple is 0.15dB up

to 0.9f . The stopband attenuation of the LTC1069-1

CUTOFF

features a progressive elliptic response reaching 20dB

attenuation at 1.2f , 52dB attenuation at 1.4f

CUTOFF

and 70dB attenuation at 2f

CUTOFF

APPLICATIONS

With 5V supplies, the LTC1069-1 cutoff frequency can

be clock-tuned up to 12kHz; with a single 5V supply, the

maximum cutoff frequency is 8kHz.

Telecommunication Filters

Antialiasing Filters

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

trademarks are the property of their respective owners.

The low power feature of the LTC1069-1 does not penal-

ize the device’s dynamic range. With 5V supplies and an

input range of 0.3V

to 2.5V

, the signal-to-(noise +

RMS

THD)ratiois≥70dB.ThewidebandnoiseoftheLTC1069-1

is 110μV

. Other ﬁlter responses with lower power or

RMS

higher speed can be obtained. Please contact LTC market-

ing for details.

The LTC1069-1 is available in 8-pin PDIP and 8-pin SO

packages.

TYPICAL APPLICATION

Frequency Response

–10

–20

–30

–40

–50

–60

–70

Single 3.3V Supply 3kHz Elliptic Lowpass Filter

AGND

OUT

0.47μF

3.3V

0.1μF

–

LTC1069-1

CLK

300kHz

1069-1 TA01

–80

1.5

7.5

4.5

FREQUENCY (kHz)

10691 TA02

10691fa

12 3 4 5 6 7...10

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