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WM8761-EV1M 

WM8761 Evaluation Board User Handbook 

 

WOLFSON MICROELECTRONICS plc 

www.wolfsonmicro.com 

July 2004,  Rev 1.1 

Copyright 

2004 Wolfson Microelectronics plc 

 

INTRODUCTION 

The WM8761 is a 24-bit 192kHz Stereo DAC. 

This evaluation platform and documentation should be used in conjunction with the latest version of 
the WM8761 datasheet. The datasheet gives device functionality information as well as timing and 
data format requirements. 

This evaluation platform has been designed to make it easy to gain familiarity with the WM8761 and 
to allow optimum performance to be measured. 

 

GETTING STARTED 

PACKING LIST 

The WM8761 Evaluation Kit contains: 

1 x WM8761-EV1B Evaluation Board (Labelled WM8761_EV1) 

1 x WM8761-EV1M Evaluation Board User Handbook 

 

CUSTOMER REQUIREMENTS 

Minimum Equipment Requires:  

 

D.C. Power supply of +2.7 to +5.5V (See WM8761 Datasheet for details) 

 

D.C. Power supply of +5V. 

 

D.C. Power supply of +/- 12V 

Digital Input Signal Path Requires: 

 

Digital coaxial or optical data source 

Analog Output Path Requires: 

 

Two Audio receivers, for LEFT and RIGHT outputs. 

 

Summary of Contents for WM8761-EV1M

Page 1: ...equirements This evaluation platform has been designed to make it easy to gain familiarity with the WM8761 and to allow optimum performance to be measured GETTING STARTED PACKING LIST The WM8761 Evaluation Kit contains 1 x WM8761 EV1B Evaluation Board Labelled WM8761_EV1 1 x WM8761 EV1M Evaluation Board User Handbook CUSTOMER REQUIREMENTS Minimum Equipment Requires D C Power supply of 2 7 to 5 5V ...

Page 2: ... J8 and J13 running up each side of the device PCB MAIN CONNECTIONS POWER SUPPLIES CONNECTOR REFERENCE CONNECTOR TYPE SIGNAL REFERENCE VOLTAGE LEVEL J1 4mm Panel Socket 5V 5 VDC J2 4mm Panel Socket GND 0 VDC J3 4mm Panel Socket DVDD 2 7 to 5 5 VDC J4 4mm Panel Socket GND 0 VDC J5 4mm Panel Socket 12V 12 VDC J6 4mm Panel Socket 12V 12 VDC Refer to the WM8761 datasheet for limitations on individual ...

Page 3: ...10 LNK2 1 1 1 1 1 LNK10 LNK3 LNK4 LNK1 1 1 J14 J9 1 3 2 Figure 1 WM8761 EV1B Board Interfaces Component Side HEADERS J13 SIGNAL J8 SIGNAL 1 LRCIN 1 VDD 2 DIN 2 VOUTL 3 BCKIN 3 MUTE 4 NC 4 NC 5 CAP 5 DEEMPH 6 VOUTR 6 FORMAT 7 GND 7 MCLK 8 GND 8 GND Table 4 WM8761 Headers H1 SIGNAL H1 SIGNAL 1 SDATA 2 DIN 3 DGND 4 DGND 5 MCK 6 MCLK 7 DGND 8 DGND 9 FSYNC 10 LRCIN 11 DGND 12 DGND 13 SCK 14 BCKIN 15 DG...

Page 4: ...Coupled SHORT VOUTL DC Coupled LNK10 1 2 I2S or DSP early mode 2 3 16 Bit Right Just or DSP late mode LNK12 OPEN VOUTR AC Coupled SHORT VOUTR DC Coupled J9 1 2 Unfiltered VOUTL 2 3 Filtered VOUTL J14 1 2 Unfiltered VOUTR 2 3 Filtered VOUTR Table 6 Links SWITCHES SWITCH SETTING DESCRIPTION 1 2 3 4 CS8414 Normal Audio Port Modes 0 1 0 x I2 S SW1 1 0 1 x 16 Bit Right Justify Table 7 Switches ...

Page 5: ...3V TO 5 5V 12V GND J1 J2 J3 J6 J9 1 1 LNK8 1 LNK12 J4 U3 SW1 0 1 J15 J11 J8 J13 J5 12V H1 J9 J10 LNK2 1 1 1 1 1 LNK10 LNK3 LNK4 LNK1 1 1 J14 J9 DIGITAL AUDIO SOURCE 5V 5V 0V 12V 12V 0V Figure 2 Basic Test Connection Diagram The hardware settings required for the WM8761 Evaluation board are described in the table below LINKS SWITCHES DESCRIPTION H1 Add 8 Links as shown in figure 11 SW1 Set to 0100 ...

Page 6: ...WM8761 EV1M w Rev 1 1 July 2004 6 WM8761 EV1B SCHEMATIC Figure 3 Functional Block Diagram Figure 4 Digital Input ...

Page 7: ...WM8761 EV1M w Rev 1 1 March 2004 7 Figure 5 Analog Output Figure 6 WM8761 ...

Page 8: ...WM8761 EV1M w Rev 1 1 July 2004 8 Figure 7 Power WM8761 EV1B PCB LAYOUT Figure 8 Top Layer Silkscreen ...

Page 9: ...WM8761 EV1M w Rev 1 1 March 2004 9 Figure 9 Top Layer Figure 10 Bottom Layer ...

Page 10: ...n Through Hole Cap 16V 20 C5 C8 C11 C13 C18 C32 C36 9 DS1812 5V Power On Reset chip SOT U1 1 680pF 0805 SMD Ceramic Capacitor 50V NPO C14 C33 2 1nF 0805 SMD Ceramic Capacitor 50V NPO C15 C34 2 0R 0805 SMD chip resistor 1 0 1W R7 R26 2 0R 1206 Resistor on 1210 Inductor site L1 L4 4 470R 0805 SMD chip resistor 1 0 1W R16 1 1K8 0805 SMD chip resistor 1 0 1W R9 R22 2 4K7 0805 SMD chip resistor 1 0 1W ...

Page 11: ...nformation or require technical support please contact Wolfson Microelectronics Applications group through the following channels Email apps wolfsonmicro com Telephone Apps 44 131 272 7070 Fax 44 131 272 7001 Mail Applications at the address on last page or contact your local Wolfson representative Additional information may be made available from time to time on our web site at http www wolfsonmi...

Page 12: ...o result in a significant injury to the user A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness WM assumes no liability for applications assistance or customer product design WM does not warrant or represent that any license ei...

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