LTC1064-7CS

更新时间： 2024-01-10 17:38:23

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
12页	299K
描述
Linear Phase, 8th Order Lowpass Filter

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LTC1064-7CS 数据手册

LTC1064-7

Linear Phase, 8th Order

Lowpass Filter

DESCRIPTIO

EATURE

■

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

The LTC1064-7 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 whilte it exhibits steeper roll-off than an

equivalent8thorderBesselfilter. Forinstance, attwicethe

cutoff frequency the filter attains 34dB attenuation (vs

12dB for Bessel), while at three times the cutoff frequency

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.

■

O U

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.

PPLICATI

■

Data Communication Filters

Time Delay Networks

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^–).

Phase-Matched Filters

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

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

aliasing.

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

series, LTC1164-7 and LTC1264-7.

TYPICAL APPLICATI

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

PIN AND THE f

LINE.

V_S= ±7.5V

CLK

f_CLK= 4MHz

RATIO = 50:1

12 3 4 5 6 7...12

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