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LRCK

BCK

DATA0

DATA1

SCKI

RST

MUTE

SUB

CS

CCLK

CDIN

CDOUT

MODE

V

V

V

V

V

V

V

V

V

V

V

V

V

V

V

V

V

V

Digital

Filtering

and

Functions

Audio

Serial

Port

Control

and

SPI Port

Digital

Power

Analog

Power

System Clock

and

Timing

V

AGND1

V

AGND2

V

DD

DGND

V

DD

D/A Converter

and

Output Filter

D/A Converter

and

Output Filter

D/A Converter

and

Output Filter

D/A Converter

and

Output Filter

ANALOG OUTPUTS

PCM4104-EP

SBAS419 – JUNE 2007

PRODUCT OVERVIEW (continued)

Figure 2. PCM4104 Functional Block Diagram for Software Mode

correspond to Channel 4.

Each differential output is typically capable of providing 6.15-V full-scale (differential) into a 600

Ω output load.

The output section of each D/A converter channel includes a single-pole, switched capacitor low-pass filter

circuit. The switched capacitor filter response tracks with the sampling frequency of the D/A converter and

provides attenuation of the out-of-band noise produced by the delta-sigma modulator. An external two-pole

continuous time filter is recommended to further reduce the out-of-band noise energy and to band limit the

output spectrum to frequencies suitable for audio reproduction. Refer to the Applications Information section of

this data sheet for recommended output filter circuits.

14

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