User Manual

CDB4398

6. CONTROL PORT SOFTWARE

The CDB4398 is shipped with Windows 95/98/ME based software as well as Windows NT/2000/XP driv-

ers for interfacing with the CS4398 control port via t he DB25 connect or, J21. The software can be used to

communicate with the CS4398 in either SPI or I

C mode. See the readme.txt for more information.

7. DSD OPERATION

The CDB4398 supports Direct Stream Digital (DSD) operation through the header for external clocks and

data, J14. The CS4398 must be configured for the DSD mode and header J11 should be set to “external”.

See Table 2 for more information.

8. ANALOG OUTPUT FILTERING

The analog output on the CDB4398 has been designed to add flexibility when evaluating the CS4398. Two

output filter options are offered a 2-pole butterworth 50kHz low-pass filter with single ended outputs and

a 3-pole filter with XLR outputs.

The 2-pole filter (R CA) is designed to have t he in-band impedanc e matched between the positive and neg-

ative legs. It also provides a balanced to single ended conversion for standard un-balanced outputs.

The 3-pole filter (XLR) is designed to have extremely low self noi se and distortion in order to evaluate the

full performance of the CS4398.

Table 1. System Connections

CONNECTOR INPUT/OUTPUT SIGNAL PRESENT

+5V Inpu t + 5 Vol t power

VD Inpu t + 3.3 to +5V power for the CS439 8 digital supply

VLS Inpu t + 1.8 to +5V power for the CS4398 serial interface

VLC Inpu t + 1.8 to +5V power for the CS4398 control interface

J9 Inpu t -18 to -12V negative supply for the op-amps

J10 Input + 12 to +18V positive supply for the op-amps

GND Inpu t Ground co nnection from power sup ply

SPDI F INPUT - J17 Inpu t Digital audio interface input via coax

SPDIF INPUT - OPTO-1 Inpu t Digital audio interface input via optical

PCM INPUT - J12 Inpu t Input for master, serial, left/right clocks and serial data

DSD INPUT - J14 Inpu t Input for DSD data and clock

PC Po rt Input/O utput

Parallel connection to PC for SPI / I

C control port signals

EXT CTRL I/O Input/Output

I/O for SPI / I

C control port signals

OUTA and OUTB Outp ut RCA and XLR line level analog outputs