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DESCRIPTION
The WM8595 is a high performance multi-channel audio
CODEC with flexible input/output selection and digital and
analogue volume control. Features include a 24-bit stereo
ADC with digital gain control, two 24-bit DACs with
independent volume control and clocking, and a range of
input/output channel selection options with analogue volume
control for flexible routing within current and future audio
systems.
The WM8595 has a six stereo input selector which accepts
input levels up to 2Vrms. One stereo input can be selected
through an input mux to be routed through to the ADC.
The WM8595 outputs two stereo audio channels at line
levels up to 2Vrms, driven from independent DACs. The
DAC channels include independent digital volume control,
and both stereo output channels include analogue volume
control with soft ramp.
The WM8595 supports up to 2Vrms analogue inputs, 2Vrms
outputs, with sample rates from 32kHz to 192kHz on the
DACs, and 32kHz to 96kHz on the ADC.
The WM8595 is controlled via a serial interface with support
for 2-wire and 3-wire control with full readback. Control of
mute, emergency shutdown and reset can also be achieved
by pin selection.
The WM8595 is ideal for audio applications requiring high
performance and flexible routing options, including flat panel
digital TV and DVD recorder.
The WM8595 is available in a 48-pin QFN package.
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WM8595
24-bit 192kHz 2Vrms Multi-Channel CODEC
FEATURES
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Multi-channel CODEC with 6 stereo input selector and 2
stereo output selector
4-channel DAC, 2-channel ADC
6x2Vrms stereo input selector to ADC
2x2Vrms stereo output
Audio performance
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DAC: 100dB SNR typical (‘A’ weighted @ 48kHz)
DAC: -87dB THD typical
ADC: 96dB SNR typical (‘A’ weighted @ 48kHz)
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ADC: -80dB THD typical
Independent sampling rate for ADC and DACs possible
DACs sampling frequency 32kHz – 192kHz
ADC sampling frequency 32kHz – 96kHz
DAC digital volume control +12dB to -100dB in 0.5dB
steps
ADC digital volume control from +30dB to -97dB in 0.5dB
steps
ADC input analogue boost control, selectable from 0dB,
+3dB, +6dB and +12dB
Output analogue volume control +6dB to -73.5dB in 0.5dB
steps with zero cross or soft ramp to prevent pops and
clicks
Digital multiplexer to interface to multiple digital sources –
DSP, HDMI, memory card
2-wire and 3-wire serial control interface with readback and
hardware reset, mute and emergency shutdown pins
ADC features master or slave clocking modes
Programmable format audio data interface modes
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I2S, LJ, RJ, DSP
3.3V / 9V analogue, 3.3V digital supply operation
48-pin QFN package
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APPLICATIONS
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Digital Flat Panel TV
DVD-RW
Set Top Boxes
WOLFSON MICROELECTRONICS plc
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Production Data, January 2011, Rev 4.2
Copyright
©2011
Wolfson Microelectronics plc
WM8595
DVDD
DGND
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ADC Input Mux
AVDD1
ADCVMID
AGND1
VREF1C
VREF1GND
RESET
SHUTDOWN
MUTE
CIFMODE
CS
SDA
SCLK
DACDAT1
MCLK1
BCLK1
LRCLK1
DACDAT2
MCLK2
BCLK2
LRCLK2
ADCDAT
VREF2VDD
VMID2C
VREF2GND
AVDD2
AGND2
BLOCK DIAGRAM
PD, Rev 4.2, January 2011
Production Data
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Production Data
WM8595
TABLE OF CONTENTS
DESCRIPTION ....................................................................................................... 1
FEATURES............................................................................................................. 1
APPLICATIONS ..................................................................................................... 1
BLOCK DIAGRAM ................................................................................................. 2
PIN CONFIGURATION ........................................................................................... 4
PIN DESCRIPTION ................................................................................................ 5
ABSOLUTE MAXIMUM RATINGS ......................................................................... 6
RECOMMENDED OPERATING CONDITIONS ..................................................... 7
SUPPLY CURRENT CONSUMPTION ................................................................... 7
ELECTRICAL CHARACTERISTICS ...................................................................... 8
TERMINOLOGY .......................................................................................................... 10
MASTER CLOCK TIMING ........................................................................................... 11
RESET TIMING ........................................................................................................... 11
¯¯¯¯¯¯
DIGITAL AUDIO INTERFACE TIMING – SLAVE MODE ............................................. 12
DIGITAL AUDIO INTERFACE TIMING – MASTER MODE.......................................... 13
CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 14
CONTROL INTERFACE TIMING – 3-WIRE MODE .................................................... 15
POWER ON RESET (POR) ........................................................................................ 16
DEVICE DESCRIPTION ....................................................................................... 17
INTRODUCTION ......................................................................................................... 17
CONTROL INTERFACE .............................................................................................. 18
2-WIRE (SM-BUS COMPATIBLE) SERIAL CONTROL INTERFACE MODE .............. 18
3-WIRE (SPI COMPATIBLE) SERIAL CONTROL INTERFACE MODE ...................... 20
DIGITAL AUDIO DATA FORMATS ............................................................................. 21
DIGITAL AUDIO INTERFACE ..................................................................................... 26
DIGITAL AUDIO DATA SAMPLING RATES ................................................................ 28
DAC FEATURES ......................................................................................................... 29
ANALOGUE OUTPUT VOLUME CONTROL ............................................................... 32
ADC FEATURES ......................................................................................................... 36
DIGITAL ROUTING CONTROL................................................................................... 40
POP AND CLICK PERFORMANCE ............................................................................ 46
GLOBAL ENABLE CONTROL ..................................................................................... 48
EMERGENCY POWER DOWN................................................................................... 49
REGISTER MAP................................................................................................... 50
DIGITAL FILTER CHARACTERISTICS ............................................................... 74
APPLICATIONS INFORMATION ......................................................................... 78
RECOMMENDED EXTERNAL COMPONENTS .......................................................... 78
RECOMMENDED ANALOGUE LOW PASS FILTER .................................................. 79
RELEVANT APPLICATION NOTES ............................................................................ 79
PACKAGE DIMENSIONS .................................................................................... 80
IMPORTANT NOTICE .......................................................................................... 81
ADDRESS ................................................................................................................... 81
REVISION HISTORY ............................................................................................ 82
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PD, Rev 4.2, January 2011
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WM8595
PIN CONFIGURATION
VREF2GND
VREF1GND
VREF2VDD
CIFMODE
Production Data
VMID2C
LINEOUT2L
GPIO1
GPIO2
AGND2
LINEOUT1L
AVDD2
SHUTDOWN
LINEOUT2R
ORDERING INFORMATION
ORDER CODE
WM8595GEFL/V
WM8595GEFL/RV
Note:
Reel quantity = 2200
TEMPERATURE
RANGE
-40°C to +85°C
-40°C to +85°C
PACKAGE
48-lead QFN
(Pb-free)
48-lead QFN
(Pb-free, tape and reel)
MOISTURE SENSITIVITY
LEVEL
MSL3
MSL3
PACKAGE BODY
TEMPERATURE
260
o
C
260
o
C
LINEOUT1R
RESET
MUTE
IN1L
VMID1C
SDOUT
AGND1
AVDD1
SDA
SCLK
CS
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PD, Rev 4.2, January 2011
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Production Data
WM8595
PIN DESCRIPTION
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
NAME
MCLK1
LRCLK1
N/C
BCLK1
DACDAT1
MCLK2
LRCLK2
BCLK2
DACDAT2
ADCDAT
DVDD
DGND
GPIO1
GPIO2
¯¯¯¯¯¯¯¯¯¯¯
SHUTDOWN
MUTE
RESET
¯¯¯¯¯¯
AVDD2
AGND2
LINEOUT2R
LINEOUT2L
LINEOUT1R
LINEOUT1L
IN1L
IN1R
IN2L
IN2R
IN3L
IN3R
IN4L
IN4R
IN5L
IN5R
IN6L
IN6R
VREF1C
VMID1C
VREF1GND
VREF2VDD
VMID2C
VREF2GND
AVDD1
AGND1
CIFMODE
SDOUT
CS
¯¯
SCLK
SDA
Digital Input/Output
Digital Input
Digital Input/Output
Digital Input/Output
Digital Input/Output
Digital Input
Digital Output
Supply
Supply
Digital Input/Output
Digital Input/Output
Digital Input
Digital Input
Digital Input
Supply
Supply
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Output
Analogue Output
Analogue Input
Analogue Input
Analogue Output
Analogue Input
Supply
Supply
Digital Input
Digital Output
Digital Input
Digital Input
Digital Input
TYPE
Digital Input/Output
Digital Input/Output
DESCRIPTION
Audio interface port 1 master clock input/output
Audio interface port 1 left/right clock input/output
No internal connection
Audio interface port 1 bit clock input/output
Audio interface port 1 data input for DAC1
Audio interface port 2 master clock input/output
Audio interface port 2 left/right clock input/output
Audio interface port 2 bit clock input/output
Audio interface port 2 data input for DAC2
Audio interface port 3 data output for ADC
Digital supply
Digital ground
General purpose input/output 1
General purpose input/output 2
Emergency shutdown
Hardware DAC mute
Hardware reset
Analogue 9V supply
Analogue 9V ground
Output channel 2 right
Output channel 2 left
Output channel 1 right
Output channel 1 left
Input channel 1 left
Input channel 1 right
Input channel 2 left
Input channel 2 right
Input channel 3 left
Input channel 3 right
Input channel 4 left
Input channel 4 right
Input channel 5 left
Input channel 5 right
Input channel 6 left
Input channel 6 right
Positive reference for ADC
Midrail divider decoupling pin for ADC
Ground reference for ADC
Positive reference for DACs
Midrail divider decoupling pin for DACs
Ground reference for DACs
Analogue 3.3V supply
Analogue 3.3V ground
2-wire/3-wire mode select
Serial Data output for 3-wire readback
3-wire serial control interface latch
Software mode: serial control interface clock signal
Software mode: bi-directional serial control interface data signal
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PD, Rev 4.2, January 2011
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