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MC145076D
MC145076 Stereo Audio FIR Smoothing Filter
Product Preview --
CMOSThe MC145076 is a combination re–clocking and smoothing filter designed
especially for the MC145074 Stereo Audio DAC. Its versatility however, allows
it to be used with any single bit–stream data converter to provide output
reconstruction filtering, and to improve performance by restoring pulse shape
integrity. The MC145076 provides a well controlled, filtered output that can be
used directly, or with a current summing operational amplifier.
The MC145076 is intended to be one half of a two–chip solution for serial bit
steam DACs. The analog filtering function of the MC145076 eases the digital
filtering requirements at the input to the digital noise shaping modulator, and
eliminates the need for precision analog output filtering capacitors, resulting in
lower overall system cost. The MC145076 pulse shape restoration frees the
designer from analog pitfalls that can impact performance, thereby lowering the
risk of new product development with a sigma–delta DAC. Single–Ended Stereo Outputs Require no Additional Smoothing Filters 86 dB S/D, 96 dB S/N with MC145074 @ 192 x OSR Single Ended > 100 dB S/(N+D) @ 256 OSR, Differential Mode 18.5 MHz Maximum Serial Data Input Rate – 80 dB Cross Channel Interference 72–Tap FIR with > 40 dB Alias Filtering Operating Temperature Range: – 40 to + 85C Buffered Data Clock Output for Ease of Data Generation 16–Pin Narrow Body SOIC Package Single Supply Operation: + 5 V
DIL
DIR
DIV2 4
TEST
Xout
Xin
VDDA 1
VDDD 8
GND 10
GND 15 IOL
GND CLKOUT IOR
GND
BIAS 3
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
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SEMICONDUCTOR TECHNICAL DATA
