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LF2242 - 12/16-bit Half-Band Interpolating/ Decimating Digital Filter

Description

The LF2242 is a linear-phase, halfband (low pass) interpolating/ decimating digital filter that, unlike intricate analog filters, requires no tuning.

Features

  • u 40 MHz Clock Rate u Passband (0 to 0.22fS) Ripple: ±0.02 dB u Stopband (0.28fS to 0.5fS) Rejection: 59.4 dB u User-Selectable 2:1 Decimation or 1:2 Interpolation u 12-bit Two’s Complement Input and 16-bit Output with User-Selectable Rounding, 8- to 16-Bits u User-Selectable Two’s Complement or Inverted Offset Binary Output Formats u Three-State Outputs u Replaces TRW/ Raytheon/ Fairchild TMC2242 u Package Styles Available:.
  • 44-pin PLCC, J-Lead.
  • 44-pin PQFP sample rate. Once.

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Datasheet Details

Part number LF2242
Manufacturer LOGIC Devices Incorporated
File Size 136.32 KB
Description 12/16-bit Half-Band Interpolating/ Decimating Digital Filter
Datasheet download datasheet LF2242 Datasheet

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Full PDF Text Transcription

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LF2242 DEVICES INCORPORATED DEVICES INCORPORATED 12/16-bit Half-Band Interpolating/ Decimating Digital Filter DESCRIPTION The LF2242 is a linear-phase, halfband (low pass) interpolating/ decimating digital filter that, unlike intricate analog filters, requires no tuning. The LF2242 can also significantly reduce the complexity of traditional analog anti-aliasing prefilters without compromising the signal bandwidth or attenuation. This can be achieved by using the LF2242 as a decimating post-filter with an A/D converter and by sampling the signal at twice the rate needed. Likewise, by using the LF2242 as an interpolating pre-filter with a D/A converter, the corresponding analog reconstruction post-filter circuitry can be simplified.
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