PCM1795DBRG4 datasheet(48/68 Pages) TI2

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0.0005

0.0004

0.0003

0.0002

0.0001

0.0002

0.0003

0.0004

0.0005

Frequency( f )

´ S

0.2

0.5

0.1

0.3

0.4

PassbandRipple

SharpRoll-Off

Frequency( f )

´ S

0.2

0.6

0.1

0.3

0.4

0.5

TransitionCharacteristics

SlowRoll-Off

PCM1795

SLES248A – MAY 2009 – REVISED MARCH 2015

www.ti.com

8.2.3.2.4.2

DMF[1:0]: Analog-FIR Performance Selection

Default value: 00

Table 38. DMF[1:0]

DMF[1:0]

ANALOG-FIR PERFORMANCE SELECTION

FIR-1 (default)

FIR-2

FIR-3

FIR-4

Plots for the four analog finite impulse response (FIR) filter responses are shown in Analog FIR Filter

Performance in DSD Mode .

8.2.3.2.4.3

OS[1:0]: Analog-FIR Operation-Speed Selection

Default value: 00

Table 39. OS[1:0]

OS[1:0]

OPERATING SPEED SELECTION

fDBCK (default)

fDBCK/2

Reserved

fDBCK/4

The OS bit in the DSD mode is used to select the operating rate of the analog FIR. The OS bits must be set

before setting the DSD bit to '1'.

8.2.3.3 Application Curves

Figure 66. Amplitude vs Frequency

Figure 67. Amplitude vs Frequency

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