SM5950AM datasheet(13/20 Pages) NPC

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SM5950AM

NIPPON PRECISION CIRCUITS INC.—13

Conversion performance

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

20-bit output: – 122dB

24-bit output: – 146dB

Overall theoretical output S/N ratio

Anti-aliasing ﬁlter characteristics

Output signal

word length

S/N ratio

16-bit input

20-bit input

24-bit input

16 bits

– 92.5dB

– 94.0dB

20 bits

– 93.9dB

– 96.2dB

24 bits

– 93.9dB

– 96.2dB

Figure 1. Anti-aliasing ﬁlter characteristics

-120

-100

-80

-60

-40

-20

0.1

0.2

0.3

0.4

0.5

0.6

Frequency [

× fsi]

48 to 44.1kHz

48 to 32kHz

48 to 22.05kHz

up conversion

44.1 to 32kHz

48 to 24kHz

SM5950AM Datasheet(PDF) 13 Page - Nippon Precision Circuits Inc

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