BD9406KS2 Datasheet, PDF (1/38 Pages) Rohm – 28bit Audio DSP with Built-in 2ch ADC, 6ch DAC and ASRC

Digital Sound Processors for FPD TVs
28bit Audio DSP with Built-in
2ch ADC, 6ch DAC and ASRC
BD9406KS2
No.12083EAT01
●General Description
This LSI is the digital sound processor which made the use digital signal processing for FPD TVs.
DSP of ROHM original is used for the TV sound processor unit, and it excels in cost performance.
The asynchronous sampling rate converter is built in the digital input one line. The audio AD converter is built in
the analog input one line. The audio DA converters are built in the output three lines.
●Features
■ Digital Signal Processor unit
Word length:
28bit (Data RAM)
The fastest machine Cycle: 40.7ns (512fs, fs=48kHz)
Multiplier:
28x24 → 52 bit
Adder:
28+28 → 28bit
Data RAM:
256x28bit
Coefficient RAM:
128x24bit
Sampling Frequency:
fs=48kHz
Master Clock:
512fs (24.576Mhz, fs=48kHz)
■ Digital Signal Input (Stereo 4 lines): 16/20/24bit (I²S, Left-Justified, Right-Justified)
Digital Signal Output (Stereo 4 lines): 16/20/24bit (I²S, Left-Justified, Right-Justified, S/PDIF)
■ Asynchronous Sampling Rate Converter (Stereo 1 line): 32kHz/44.1kHz → 48kHz
■ Audio ADC: Stereo Input 1 line
20bit 64 x Over-sampling sigma delta ADC
S/N:
90dB
THD+N: 0.02% (Sine-wave 1kHz, -0.5dB)
Digital HPF (fc=1Hz)
■ Audio DAC: Stereo Output 2 lines
24bit 8x Over-sampling digital filter + 1bit sigma delta DAC
S/N:
96dB
THD+N: 0.005% (Sine-wave 1kHz, 0dB)
■ Audio 16bit DAC: Stereo Output 1 line
24bit 8x Over-sampling digital filter + Audio 16bit DAC
S/N:
90dB
THD+N: 0.03% (Sine-wave 1kHz, 0dB)
■ The sound signal processing function for FPD TVs
Pre-scaler, Channel Mixer, Pseudo Stereo, Surround, P²Bass, SAS,12-band parametric EQ, Master Volume,
L/R Balance, Compression, Post-scaler, Output Signal Clipper
(P²Bass and SAS are ROHM’s own sound effect functions.)
●Applications
Flat Panel TVs (LCD, Plasma)
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
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2012.03 - Rev.A