sm5950b Seiko NPC Corp., sm5950b Datasheet - Page 13

• Manufacturer Part Number: sm5950b
• Description: Asynchronous Sample Rate Converter
• Manufacturer: Seiko NPC Corp.

Conversion performance
I
I
I
I
Overall theoretical output S/N ratio
Anti-aliasing filter characteristics
Internal data word length: 20 bits
Gain deviation from deemphasis filter ideal characteristic: ± 0.03dB
Anti-aliasing filter characteristic
• Passband ripple: ± 0.0001dB
• Stopband attenuation: > 98dB
Conversion insertion quantization noise level
• Internal computation noise: ≤ – 96dB
• Output round-off noise: 16-bit output: – 98dB
Output signal
word length
16 bits
20 bits
24 bits
-100
-120
-20
-60
-80
-40
0
0
16-bit input
– 92.5dB
– 93.9dB
– 93.9dB
20-bit output: – 122dB
24-bit output: – 146dB
0.1
Figure 1. Anti-aliasing filter characteristics
48 to 22.05kHz
0.2
20-bit input
SM5950BM
S/N ratio
– 94.0dB
– 96.2dB
– 96.2dB
Frequency [× fsi]
48 to 24kHz
0.3
48 to 32kHz
44.1 to 32kHz
0.4
24-bit input
– 94.0dB
– 96.2dB
– 96.2dB
48 to 44.1kHz
SEIKO NPC CORPORATION —13
0.5
up conversion
0.6