GF9102A |
RFQ for GF9102A Required Field |
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| Product | Manufacturers | Pack | D/C |
| GF9102A | - | - | 1 |
The GF9102A is a linear phase FIR digital filter that is usable in a variety of video signal processing applications. The evice contains three separate fixed coefficient filters and can be operated in three basic modes: 53 tap low pass filter, 9 tap chroma bandpass filter or 21 tap chroma bandpass filter.
In the 53 tap low pass filter mode, the GF9102A can replace the TMC2242 in all applications, except those requiring 1:1 low pass filtering, for improved performance and full CCIR 601 compatibility. Specific improvements include true unity gain at DC, 12.4 dB attenuation at ƒs/4 with a single device, reduced output ringing with constant input in interpolate mode, support for signed and unsigned data formats, rounding to 10 and 8 bit CCIR 601 data formats, masking of serial digital TRS codes in the data stream, and elimination of the non-saturated-type overflow condition. The device can be operated in both TMC2242 compatible modes and in GF9102A enhanced modes.
When used as a decimating post-filter with a double speed oversampling analog-digital converter, the device greatlyreduces the cost and complexity of the associated analog anti-aliasing pre-filter. In a similar fashion, when used as an interpolating pre-filter with a double speed oversampling digitalanalog converter, the GF9102A simplifies the analog reconstruction post-filter. The GF9102A also exceeds the requirements for conversion between 4:2:2 and 4:4:4 signal formats.
For chroma filtering applications, the GF9102A can be operated as a 9 or 21 tap bandpass filter by selecting the appropriate operating mode.
The GF9102A is packaged in a 44 pin PLCC and is pin compatible with the TMC2242. The device operates with a single +5 V supply.
Typical Application |
Features |
| • CCIR 601-compliant oversampling video A/D and D/A conversion• 2:1 interpolation and decimation• 4:2:2 to 4:4:4 format conversion• Chroma bandpass filtering | • improved performance over TMC2242 in applications not requiring 1:1 low pass filtering• low power (60mA typical at ƒ = 20MHz)• 40 MHz maximum clock rate• single device exceeds CCIR 601 lowpass filter requirements• true unity gain (0.0 dB) at DC• reduced output ringing with constant input in interpolation mode• built-in TRS code protection• 12 bit inputs and 16 bit outputs in 2's complement signed or unsigned formats• user-selectable 8 to 16 bit output rounding• can also be operated as a 9 or 21 tap chroma bandpass filter under user control• single +5 V power supply• three state outputs |
| PARAMETER VALUE |
| Supply Voltage -0.3 to +7.0V Input Voltage Range 0.5 to (VDD + 0.5)V Operating Temperature Range 0°CTA70°C Storage Temperature Range -65°CTS150°C Lead Temperature (soldering, 10 sec) 260°C |
