SM5849BF View Datasheet(PDF) - Nippon Precision Circuits

Part Name

Description

Manufacturer

SM5849BF

Asynchronous Sample Rate Converter

Nippon Precision Circuits  

SM5849BF

FEATURES

Filter Characteristics and Converter Efficiency

I 24-bit internal data word length

I Deemphasis filter characteristics (IIR filter)

• ±0.03dB gain deviation from ideal filter charac-

teristics

I Anti-aliasing LPF characteristics

• Output/input sample rate conversion ratio auto-

matic filter select (6 FIR filters)

- Up converter LPF

1.0 to 2.2 times

- Down converter LPF I

0.92 times: 48.0 to 44.1kHz

- Down converter LPF II

0.73 times: 44.1 to 32.0kHz

- Down converter LPF III

0.67 times: 48.0 to 32.0kHz

- Down converter LPF IV

0.5 times: 48.0 to 24.0kHz

- Down converter LPF V

0.45 times: 48.0 to 22.1kHz

• ±0.00005dB passband ripple

• > 110dB stopband attenuation

I Converter noise levels

• ≤ −110dB internal calculation (quantization)

noise

• −98dB (16-bit output), −122dB (20-bit output),

and −146dB (24-bit output) word rounding

noise

I Output S/N ratio (theoretical values)

Output signal

word length

16 bits

20 bits

24 bits

16-bit input

word length

94.8dB

97.7dB

97.7dB

S/N ratio

20-bit input

word length

97.7dB

109.5dB

109.7dB

24-bit input

word length

97.7dB

109.7dB

110dB

Interfaces

I Input data format

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

• IIS/non-IIS format

Mode

1

2

3

4

5

6

7

8

9

10

11

12

Word length

16 bits

20 bits

24 bits

Data position Data sequence

Right justified MSB first

Right justified

LSB first

Left justified

MSB first

IIS

MSB first

Right justified MSB first

Right justified

LSB first

Left justified

MSB first

IIS

MSB first

Right justified MSB first

Right justified

LSB first

Left justified

MSB first

IIS

MSB first

I Output data format

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

serial

• Continuous bit clock

Mode

1

2

3

4

5

6

7

Word length

16 bits

20 bits

24 bits

24 bits

16 bits

20 bits

24 bits

IIS selection Data position

Normal

(non IIS)

Right justified

Left justified

IIS

APPLICATIONS

I Digital audio equipment-interface sample rate

conversion (AV amplifiers, CD-R, DAT, MD and

8mm VTRs)

I Commercial recording/editing equipment sample

rate conversion

SEIKO NPC CORPORATION —2

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