TDA1307 Datasheet, PDF (3/36 Pages) NXP Semiconductors – High-performance bitstream digital filter

Philips Semiconductors
High-performance bitstream digital filter
Preliminary specification
TDA1307
GENERAL DESCRIPTION
The TDA1307 is an advanced oversampling digital filter
employing bitstream conversion technology, which has
been designed for use in premium performance digital
audio applications. Audio data is input to the TDA1307
through its multiple-format interface. Any of the four
formats (I²S, Sony 16, 18 or 20-bit) are acceptable. By
using a highly accurate audio data processing structure,
including 8 times oversampling digital filtering and up to
4th order noise shaping, a high quality bitstream is
produced which, when used in the recommended
combination with the TDA1547 bitstream DAC, provides
the optimum in dynamic range and signal-to-noise
performance. With the TDA1307, a high degree of
versatility is achieved by a multitude of functional features
and their easy accessibility; error concealment functions,
audio peak data information and an advanced patented
digital fade function are accessible through a simple
microprocessor command interface, which also provides
access to various integrated system settings
and functions.
TDA1307 plus TDA1547 high-performance bitstream
digital filter plus DAC combination:
For many features:
• Highly accessible structure
• Intelligent audio data processing.
For optimum performance:
• 4th order noise shaping
• Improvement dynamic range (113 dB)
• Improvement signal-to-noise (115 dB).
handbook, full pagewidth
fsystem = 768fs
20-bit fs
TDA1307
1-bit, 192fs
TDA1547
8 × oversampling FIR
filter, 20-bit
24 × upsampling
3rd or 4th order noise shaping,
1-bit end quantization
1-bit high-performance
digital-to-analog
converter
L
R
3rd order analog
postfilter, fo = 55 kHz
Butterworth response
MGB983
Fig.1 High performance bitstream reconstruction system.
1996 Jan 08
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