SM5844 查看數據表（PDF） - Nippon Precision Circuits

零件编号

产品描述 (功能)

生产厂家

SM5844

Asynchronous Sample Rate Converter

Nippon Precision Circuits  

SM5844AF

Filter Characteristics and Converter

Efficiency

s 20-bit internal data word length

s Deemphasis filter characteristics (IIR filter)

• ±0.03 dB gain deviation from ideal filter

characteristics

s Converter noise levels

• ≤ −110 dB internally-generated noise

• −98 dB (16-bit output), −110 dB (18-bit output)

and −122 dB (20-bit output) word rounding

noise

s Anti-aliasing LPF characteristics (4 FIR filters)

with automatic output/input sample rate

conversion ratio selection

• Up converter LPF (1.0 to 2.0 times)

• Down converter LPF 1 (48.0 to 44.1 kHz or

0.92 times)

• Down converter LPF 2 (44.1 to 32.0 kHz or

0.73 times)

• Down converter LPF 3 (48.0 to 32.0 kHz or

0.67 times)

s Output S/N ratio (theoretical values)

Output signal word

length

16 bits

18 bits

20 bits

S/N ratio

16-bit input word

length

20-bit input word

length

94.8 dB

97 dB

97.5 dB

106 dB

97.7 dB

109 dB

Interfaces

s Input data format

• 2s-complement, L/R alternating, serial

• Normal format (non IIS)

Mode

1

2

3

4

W ord length

16 bits

Front/rear

packing

Rear

20 bits

Front

Rear

Data

sequence

MSB first

LSB first

s Output data format

• 2s-complement, MSB first, L/R alternating,

serial

• Continuous bit clock

Mode

1

2

3

4

5

6

7

W ord length IIS selection

16 bits

18 bits

20 bits

20 bits

16 bits

18 bits

20 bits

Normal (non

IIS)

IIS

Front/rear

packing

Rear

Front

NIPPON PRECISION CIRCUITS—2

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