Datasheet > RFR1772F

RFR1772F

更新时间： 2024-09-25 06:07:35

品牌	Logo	应用领域
智原科技 - FARADAY		LTE
页数	文件大小	规格书
2页	85K
描述
ANTIALIASING FILTERS

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RFR1772F 数据手册

RFR SERIES

ANTIALIASING FILTERS

These filters are designed especially for use in systems where composite video signals are digitised. A sampling frequency of

four times the colour subcarrier frequency is normally used as with D2 systems. The filters have a bandwidth of 5.5 MHz for

625 line systems, a stopband attenuation of 50 dB after 11.75 MHz and a zero at the sampling rate of 17.72 MHz. The

attenuation at the sampling frequency is approximately 80 dB so minimising aliasing effects. The relatively slow roll-off and

controlled group delay over the whole of the passband minimises time domain ringing ensuring the system has an excellent

performance. Flat (pre filter) and sinx/x (post filter) versions are available. The module is 40 pin DIL suitable for direct

mounting in a pcb. Ground pins should be taken to separate earth points to maintain transmission line characteristics if the

full stopband performance is required.

Type Number

RFR1772F

Lowpass

Flat

RFR1772S

Lowpass

Sinx/x

Filter Shape

Passband Shape

17.72 MHz

> 70 dB

< 0.8 dB

5.5 MHz

+ 0.10 dB

18.0 dB

17.72 MHz

> 70 dB

< 2.5 dB

5.5 MHz

+ 0.15 dB

16.5 dB

Sampling Frequency

Attenuation at S.F. wrt 100 kHz

Insertion Loss at 100 kHz

End Of Passband

Passband Ripple wrt 100 kHz

Loss at half S.F. wrt 100 kHz

Start Of Stopband

11.75 MHz

> 50 dB

+ 5.0 ns

5.5 MHz

250 ns nom

< 0.5 %

11.75 MHz

> 50 dB

+ 5.0 ns

5.0 MHz

240 ns nom

< 0.5 %

Stopband Attenuation

Group Delay Ripple wrt 200 kHz

Group Delay Bandwidth

Delay Time at 200 kHz

Pulse And Bar K - Rating

Luminance / Chrominance Gain

Luminance / Chrominance Delay

Impedance

< 2 %

n/a

< 5 ns

75 ohms

0°C to 70°C

Yes

75 ohms

0°C to 70°C

Yes

Temperature Range

Aqueous washable

DR00020B

Package Type

FARA158d Page 1 of 2 Dec-99(A)

中文翻译

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