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SM5950BM датащи(PDF) 2 Page - Nippon Precision Circuits Inc

номер детали SM5950BM
подробное описание детали  Asynchronous Sample Rate Converter
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производитель  NPC [Nippon Precision Circuits Inc]
домашняя страница  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM5950BM датащи(HTML) 2 Page - Nippon Precision Circuits Inc

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SM5950BM
SEIKO NPC CORPORATION —2
FEATURES
Interfaces
I
Input data format
• 2s-complement, MSB-first, L/R alternating serial
data
• IIS/non-IIS formats
L = Low input level, H = high input level
I
Output data format
• 2s-complement, MSB-first, L/R alternating serial
data
• Bit clock continuous (64fso)
L = Low input level, H = high input level
Structure
I
Silicon-gate CMOS process
Applications
I
Digital audio equipment-interface sample rate con-
version (AV amplifier, CD-R/RW, DAT, MD, DVC)
I
Recording/editing equipment sample rate conver-
sion
Converter Performance
I
Internal data word length: 20 bits
I
Deemphasis filter characteristics (IIR filter)
± 0.03dB gain deviation from ideal filter char-
acteristic
I
Anti-aliasing LPF characteristics (6 types of FIR
filter)
• Output/input sample rate conversion ratio auto-
matic filter select (6 FIR filters)
1.Up converter LPF
1.0 to 2.205 times
2.Down converter LPF I
about 0.92 times: 48.0kHz to 44.1kHz
3.Down converter LPF II
about 0.73 times: 44.1kHz to 32.0kHz
4.Down converter LPF III
about 0.67 times: 48.0kHz to 32.0kHz
5.Down converter LPF IV
about 0.50 times: 96.0kHz to 48.0kHz
6.Down converter LPF V
about 0.45 times: 96.0kHz to 44.1kHz
- Passband ripple: ± 0.0001dB
- Stopband attenuation: > 98dB
I
Converter insertion quantization noise level
• Internal calculation (quantization) noise
:
≤ – 96dB
• Output round-off noise:
- 16-bit output mode : – 98dB
- 20-bit output mode : – 122dB
- 24-bit output mode : – 146dB
• Output S/N ratio (theoretical values)
Format
IMOD0
IMOD1
IISI
16-bit MSB-first right-justified
L
L
L
20-bit MSB-first right-justified
H
L
L
24-bit MSB-first right-justified
L
H
L
MSB-first left-justified
(leading 16 bits valid data)
HH
L
IIS (leading 16 bits valid data)
H or L
H or L
H
Format
OMOD0
OMOD1
IISO
16-bit MSB-first right-justified
L
L
L
20-bit MSB-first right-justified
H
L
L
24-bit MSB-first right-justified
L
H
L
MSB-first left-justified (16-bit output)
H
H
L
IIS (16-bit output)
H or L
H or L
H
Output signal
word length
S/N ratio
16-bit input 20-bit input 24-bit input
16 bits
– 92.5dB
– 94.0dB
– 94.0dB
20 bits
– 93.9dB
– 96.2dB
– 96.2dB
24 bits
– 93.9dB
– 96.2dB
– 96.2dB


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