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Wolfson WM8761-EV1M User Handbook Manual

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WM8761 Evaluation Board User Handbook
INTRODUCTION

GETTING STARTED

PACKING LIST

CUSTOMER REQUIREMENTS
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
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.
The WM8761 Evaluation Kit contains:
1 x WM8761-EV1B Evaluation Board (Labelled WM8761_EV1)
1 x WM8761-EV1M Evaluation Board User Handbook
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.
WM8761-EV1M
July 2004, Rev 1.1
Copyright 2004 Wolfson Microelectronics plc

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Summary of Contents for Wolfson WM8761-EV1M

  • Page 1: Getting Started

    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) •...

  • Page 2: Board Functionality

    WM8761-EV1M BOARD FUNCTIONALITY This evaluation platform has been designed as a simple means of evaluating the WM8761 24-bit 192kHz Stereo DAC in a 14-pin SOIC package. It is versatile and can be configured for most applications. There are two options for inputting digital data into the WM8761 evaluation board. There is a coaxial input (J12) via a standard phono connector or an optical input (U3) via a standard optical receiver module.
  • Page 3 WM8761-EV1M INTERFACES DVDD -12V +12V +3V TO 5.5V Figure 1 WM8761-EV1B Board Interfaces (Component Side) HEADERS SIGNAL SIGNAL LRCIN VOUTL BCKIN MUTE DEEMPH VOUTR FORMAT MCLK Table 4 WM8761 Headers SIGNAL SIGNAL SDATA DGND DGND MCLK DGND DGND FSYNC LRCIN...
  • Page 4 WM8761-EV1M LINKS LINKS DESCRIPTION LNK1 1-2 De-emphasis ON 2-3 De-emphasis OFF LNK2 Not Populated LNK3 1-2 Mute ON 2-3 Mute OFF LNK4 Not Populated LNK8 OPEN - VOUTL AC Coupled SHORT - VOUTL DC Coupled LNK10 1-2 I2S or DSP 'early' mode 2-3 16-Bit Right Just.
  • Page 5 WM8761-EV1M BASIC TEST SETUP The setup of the WM8761 device can be altered using the various links on the evaluation board. The following configuration, as shown below in Figure 2, sets the digital audio interface mode to I S. It also configures de-emphasis OFF, mute OFF and AC coupled outputs with active filtering.

  • Page 6: Wm8761-Ev1B Schematic

    WM8761-EV1M WM8761-EV1B SCHEMATIC Figure 3 Functional Block Diagram Figure 4 Digital Input Rev 1.1 July 2004...
  • Page 7 WM8761-EV1M Figure 5 Analog Output Figure 6 WM8761 Rev 1.1 March 2004...

  • Page 8: Wm8761-Ev1B Pcb Layout

    WM8761-EV1M Figure 7 Power WM8761-EV1B PCB LAYOUT Figure 8 Top Layer Silkscreen Rev 1.1 July 2004...
  • Page 9 WM8761-EV1M Figure 9 Top Layer Figure 10 Bottom Layer Rev 1.1 March 2004...

  • Page 10: Wm8761-Ev1B Bill Of Material

    WM8761-EV1M WM8761-EV1B BILL OF MATERIAL DESCRIPTION REFERENCE QUANTITY Phono Socket PCB mount RED J11, J15 Phono Socket PCB mount YELLOW Phono Socket PCB mount WHITE J7, J10 DIL Switch 4-Way Rocker 1.32mm PCB Test Terminal BLACK TP1 – TP6 220pF 0805 SMD Ceramic Capacitor 50V X7R C16, C35 0.01uF 0805 SMD Ceramic Capacitor 50V X7R...

  • Page 11: Evaluation Support

    The aim of this evaluation kit is to help you to become familiar with the functionality and performance of the WM8761 Stereo DAC. If you require more information or require technical support please contact Wolfson Microelectronics Applications group through the following channels: Email: apps@wolfsonmicro.com...

  • Page 12: Important Notice

    WM8761-EV1M IMPORTANT NOTICE Wolfson Microelectronics plc (WM) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current.

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