PCM1793

SLES076A − MARCH 2003 − REVISED JANUARY 2004

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20

APPLICATION INFORMATION

ANALOG OUTPUTS

SCK

24

23

22

21

20

19

18

17

16

15

5

6

7

8

9

10

11

12

13

14

PCM1793

RST

VDD

DGND

AGNDF

VCCR

AGNDR

VOUTR−

VOUTR+

VCOM

DEMP0

VOUTL−

ZEROL

ZEROR

VCCF

VCCL

VOUTL+

AGNDC

AGNDL

LRCK

1

2

3

4

BCK

DATA

MUTE

28

27

26

25

FMT2

FMT1

FMT0

DEMP1

VCCC

+

1

µF

−

+

C3L

R6L

R4L

R5L

C1L

C2L

R3L

R2L

R1L

VOUT

L-Channel

+

5 V

−

+

VOUT

R-Channel

10

µF

0.1

µF

C3R

R6R

R4R

R5R

C1R

C2R

R3R

R2R

R1R

NOTE: Example R and C values for fC = 77 kHz – R1, R2: 1.8 kΩ, R3,R4: 3.3 kΩ, R5,R6: 680 Ω, C1: 1800 pF, C2, C3: 560 pF.

Figure 28. Typical Application for Analog Output Stage

Analog Output Level and LPF

at 0 dB (full scale). The voltage output of the LPF is given by following equation:

Op Amp for LPF

An OPA2134 or 5532 type op amp is recommended for the LPF circuit to obtain the specified audio

performance. Dynamic performance such as gain bandwidth, settling time, and slew rate of the op amp largely

determines the audio dynamic performance of the LPF section. The input noise specification of the op amp

should be considered to obtain a 113-dB S/N ratio.