SM5843A

×1

NIPPON PRECISION CIRCUITS—12

8-times interpolation filter (slow roll-off: response 2)

8fs filter response with deemphasis OFF

8fs filter band transition response with deemphasis OFF

8fs filter passband response with deemphasis OFF

Parameter

Condition

Rating @ 256fs

Passband

< 3 dB attenuation

0 to 0.455fs

Stopband

> 77 dB attenuation

0.745fs to 7.255fs

Passband ripple

0 to 0.235fs

≤ ±0.00003 dB

Stopband attenuation

≥ 77 dB

1. The digital filter arithmetic computation time from when the completion of data input at rate fs to the start of data output at rate 8fs.

SYNCN = LOW

25.625/fs

SYNCN = HIGH

25.25/fs to 26.0/fs

140

120

100

80

60

40

20

0

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

Frequency (

×fs)

140

120

100

80

60

40

20

0

0.00

0.125

0.25

0.375

0.50

0.625

0.75

0.825

1.00

Frequency (

×fs)

0.000

0.125

0.250

0.375

0.500

6.0

4.0

2.0

0.0

-2.0

Frequency (

×fs)