Product category:
Analogue and Mixed Signal ICs
News Release from: Nu Horizons Electronics Corp | Subject: LF2242
Edited by the Electronicstalk Editorial
Team on 14 July 2006
Filter replaces obsolete Fairchild part
DT Electronics is offering the Logic Devices LF2242 digital filter as a direct replacement for the Fairchild TMC2242.
DT Electronics is offering the Logic Devices LF2242 digital filter as a direct replacement for the Fairchild TMC2242 The Fairchild part is now obsolete
This article was originally published on Electronicstalk on 25 Mar 2004 at 8.00am (UK)
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The LF2242 is a 12/16-bit half-band interpolating/decimating digital filter that eliminates the tuning needed with analogue filters.
It reduces the complexity of traditional analogue anti-aliasing prefilters without compromising signal bandwidth or attenuation and will operate at up to 40 MHz clock rate with maximum ripple of +/-0.02 dB and high stop band rejection of +/-59.4 dB.
Operation is user-selectable as 2:1 decimation or 1:2 interpolation.
The coefficients of the LF2242 are fixed, the only user programming required being the selection of mode and rounding.
The asynchronous three-state output enable control simplifies interfacing to a bus.
Data input can be at up to 40Msample/s, up to the 40 MHz I./O limit, the output sample rate can be one half, equal to, or twice the input sample rate.
The output date can be either two's complement format or inverted offset binary format.
To avoid truncation errors, the output date is always internally rounded before it is latched to the output register.
Rounding is user-selectable from 8- to 16-bit values.
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