HF SERIES
The HF range of low cost HDTV filters are available in a choice of miniature packages and give
near SMPTE 274M performance suitable for single pass or monitor applications.
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·
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Aqueous washable
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Near SMPTE 274M performance
Ideal for monitor outputs
SIL or SMD package
Pre and Post, Luminance and Chrominance filters
Integer N0 of clock delays between Luminance and Chrominance Filters
Filter Type
HF7425FP*
Lowpass
Flat
HF3712FP*
Lowpass
Flat
HF7425SP*
Lowpass
Sinx/x
HF3712SP*
Lowpass
Filter Shape
Passband Shape
Sampling Frequency
Sinx/x
74.25 MHz
37.125 MHz
< 1.0 dB
74.25 MHz
< 5.0 dB
37.125 MHz
< 5.0 dB
Insertion Loss at 100 kHz < 1.0 dB
End Of Passband
Amplitude Ripple
29.7 MHz
14.85 MHz
29.7 MHz
14.85 MHz
1
2
< 0.1 dB to 29.0 MHz
< 0.15 dB to 29.7 MHz
< 0.1 dB to 14.5 MHz
< 0.15 dB to 14.85 MHz
< 0.2 dB to 29.0 MHz
< 0.2 dB to 14.5 MHz
< 0.25 dB1 to 29.7 MHz
< 0.25 dB2 to 14.85 MHz
1
2
> 12 dB Attenuation @
> 40 dB Attenuation @
Start Of Stopband
37.400 MHz
44.550 MHz
54.200 MHz
> 50 dB
18.563 MHz
22.275 MHz
27.100 MHz
> 50 dB
37.400 MHz
18.563 MHz
44.550 MHz
54.200 MHz
> 50 dB
22.275 MHz
27.100 MHz
> 50 dB
Stopband Attenuation
Stopband Measured to
100 MHz
100 MHz
100 MHz
100 MHz
<±4.5 ns to 20.0 MHz
<±6.4 ns to 29.7 MHz
Integer N0 of clock delays between Luminance
<±8.0 ns to 10.0 MHz
<±12.0 ns to 14.8 MHz
<±4.5 ns to 20.0 MHz
<±6.4 ns to 29.7 MHz
Integer N0 of clock delays + reconstruction delay
<±8.0 ns to 10.0 MHz
<±12.0 ns to 14.8 MHz
Group Delay Ripple
Delay Time at 200 kHz
and Chrominance Filters
between Luminance and Chrominance Filters
Impedance
75 ohms
75 ohms
75 ohms
75 ohms
Temperature Range
SMD Reflow Limitations
Aqueous Washable
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
refer to Data Sheet Fara309
Yes
Yes
Yes
Yes
1Measured against sinx/x roll off for a sampling frequency of 74.25 MHz
2Measured against sinx/x roll off for a sampling frequency of 37.125 MHz
Part Numbering
HF • • • •
•
•
•
Sampling 74.25 MHz – 7425
Frequency 37.125 MHz – 3712
Package
DR00005A - A
DR00291A - B
Passband
Shape
Sinx - S
Flat – F
Realisation Passive - P
Example part number HF7425SPA is a passive, luminance, sinx/x corrected for a S.F. of 74.25
MHz packaged in a 11 pin SIL as DR00005A
© Faraday Technology. As part of continual product improvement the specifications, details and dimensions shown in this publication are subject to change without notice
Fara225p
Page 1 of 2
Aug-05(C)