Datasheet > LT10647FB

LT10647FB

更新时间： 2024-11-10 01:16:55

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
16页	223K
描述
Linear Phase, 8th Order Lowpass Filter

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LT10647FB 数据手册

LTC1064-7

Linear Phase, 8th Order

Lowpass Filter

FEATURES

DESCRIPTIO

The LTC^®1064-7 is a clock-tunable monolithic 8th order

lowpass filter with linear passband phase and flat group

delay. The amplitude response approximates a maximally

flat passband while it exhibits steeper roll-off than an

equivalent8thorderBesselfilter. Forinstance, attwicethe

cutoff frequency the filter attains 34dB attenuation (vs

12dBforBessel),whileatthreetimesthecutofffrequency,

the filter attains 68dB attenuation (vs 30dB for Bessel).

The cutoff frequency of the LTC1064-7 is tuned via an

external TTL or CMOS clock.

■

Steeper Roll-Off Than 8th Order Bessel Filters

■

f_CUTOFFup to 100kHz

■

Phase Equalized Filter in 14-Pin Package

■

Phase and Group Delay Response Fully Tested

■

Transient Response Exhibits 5% Overshoot and

No Ringing

Wide Dynamic Range

■

72dB THD or Better Throughout a 50kHz Passband

■

No External Components Needed

■

Available in 14-Pin DIP and 16-Pin SO Wide

Packages

The LTC1064-7 features wide dynamic range. With single

5V supply, the S/N + THD is 76dB. Optimum 92dB S/N is

obtained with ±7.5V supplies.

APPLICATIO S

The clock-to-cutoff frequency ratio of the LTC1064-7 can

be set to 50:1 (Pin 10 to V⁺) or 100:1 (Pin 10 to V^–).

■

Data Communication Filters

■

Time Delay Networks

■

When the filter operates at clock-to-cutoff frequency ratio

of 50:1, the input is double-sampled to lower the risk of

aliasing.

Phase-Matched Filters

The LTC1064-7 is pin-compatible with the LTC1064-X

series, LTC1164-7 and LTC1264-7.

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

All other trademarks are the property of their respective owners.

TYPICAL APPLICATIO

Eye Diagram

80kHz Linear Phase Lowpass Filter

–7.5V

LTC1064-7

CLK = 4MHz

7.5V

OUT

1064-7 TA01

NOTE: THE POWER SUPPLIES SHOULD BE BYPASSED BY A

0.1µF CAPACITOR CLOSE TO THE PACKAGE AND ANY PRINTED

CIRCUIT BOARD ASSEMBLY SHOULD MAINTAIN A DISTANCE

OF AT LEAST 0.2 INCHES BETWEEN ANY OUTPUT OR INPUT

1064-7 TA02

1µs/DIV

V_S= ± 7.5V

_CLK= 4MHz

RATIO = 50:1

PIN AND THE f

LINE.

CLK

10647fb

12 3 4 5 6 7...16

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