HD-Audio AD1882A EuP APN-202304-002.pdf - Codico

Desktop PC Audio Codec 

Design For EuP Compliance 

Application Note July 28, 2009 

Rev. 1.1 

Introduction 

The Energy Using Products (EuP) directive mandates eco-design requirements to reduce standby and off power consumption of 

domestic equipment sold in the EU. This relates to a large range of household appliances that are dependent on energy from the mains 

supply to function. For desktop computers this regulation does not apply to ACPI S3 state. Specifically the EuP directive requires the 

PC to consume a maximum of 1W from the mains supply when in S5. 

PC Power Supply Design 

Power consumption for all subsystems in the PC must be minimized in S5. It is critical to select the correct system power supply to 

achieve this. The efficiency rating of a power supply across all rated output power is very important. Most important for EuP 

compliance is maximum efficiency of the standby power rail(s) when delivering low power. 

Power supplies that are labeled high efficiency (HE) may not be very efficient across all rated power output. Many tend to have lower 

efficiency in low power delivery modes such as in S5. We recommend selecting Energy Star compliant power supplies. In addition 

look for a power supply that has an “80 PLUS” logo on it. These supplies must meet a minimum of 80% efficiency across all rated 

output power -- more information at www.80plus.org. 

Make sure the power supply provides the necessary voltage rails for the audio subsystem. PC power supplies typically have at least 

+3.3V, +5V, and +5V Standby (VSB) supply rails. 3.3V standby is normally generated locally on the motherboard and should use a 

high efficiency switching regulator. Linear regulators are less efficient. 

Conexant Codec Advantages for EuP Compliance 

CX2058x (Pebble) and CX20688 (Cabo): These codec’s consume no power in S5; the power rails can be removed completely. 

Conexant driver control ensures there will be no audible output pops when the power rails are removed. These codec’s also have an 

integrated low drop-out regulator that reduces BOM cost, maximizes audio performance, reduces board area and smoothes power 

transitions reducing pops. 

CX20561 (Hermosa), CX20661 (Cocoa) and AD198X/188x: These codec’s have very high Power Supply Rejection Ratio (PSRR). 

They can be powered directly from the system or standby rail and maintain high performance and pass Premium Logo Fidelity tests. 

All Conexant codec’s have internal functional blocks that are power managed by the driver. This ensures very low power consumption 

in S5 even when powered from a standby supply rail. It also ensures no audible pops during power state transitions. 

Conexant Systems, Inc. Confidential 1

CX2058x (Pebble), CX20688(Cabo) 

Analog Port Configurations 

Codec Port 2 Channel Desktop All In One Desktop 

Port A Front panel headphone jack Headphone jack 

Port B Front panel microphone jack Internal microphone 

Port C Rear panel microphone jack Microphone jack 

Port D Rear panel Line Out jack Line Out jack 

Port E Rear panel Line In jack Line in jack 

Port F No connect No connect 

Port G No connect Internal speakers 

Power Sequencing 

Use the following codec power sequencing always: 

 

 

DVDD_3.3 should always come up before AVDD_5V is present. 

DVDD_3.3 must always be removed after AVDD_5V is removed. 

EuP Solution: 

Use one of the above platform configurations. Provide 3.3V and 5V system supplies to the codec power pins. These supplies are 

removed during S5. The Conexant audio driver ensures no audible pops when the supplies are removed. 

Power Supply Connections 

Label Pin Number Description / Connection 

64 

eLQFP 

56 

QFN 

48 QFN 

48 eLQFP 

DVDD_3.3 27 24 21 Digital Supply Voltage. +3.3 V. Connect to system +3.3V 

VAUX_3.3* 2, 6 2, 6 4 Standby Supply Voltage. +3.3 V. +3.3 V. Connect to 

DVDD_3.3. 

VDD_IO 11 11 9 HD Audio link signaling level. Connect to DVDD_3.3 or 

1.5V+/-5% system supply 

AVDD_5V 41 36 31 Analog Supply Input Voltage for LDO. +5.0 V. Connect 

to system +5.0 V supply. 

AVDD_HP 39 34 29 Supply Input Voltage for Headphone Amplifiers. +3.3 

V. Connect to system +3.3 V. 

RPWR_5.0 23 20 18 Supply Voltage for Class-D Amplifier, Right Channel. 

+5.0 V. Connect to LPWR_5.0. Connect 

LPWR_5.0/RPWR_5.0 to system +5.0 V supply through a 

0.1-ohm resistor. 

LPWR_5.0 20 17 15 Supply Voltage for Class-D Amplifier, Left Channel. 

+5.0 V. Connect to RPWR_5.0. Connect 



*VAUX_3.3: connecting to 3.3V system power disables wake-on jack functionality. 

Codec Power Consumption in S5 

0W 


CX2059x(Pelican), CX2069x(Huntington) 

Analog Port Configurations 

Codec Port 2 Channel Desktop 2/5.1 All In One Desktop 5.1 Desktop 

Port A Front panel headphone jack Headphone jack Front panel Headphone 

Port B Front panel microphone jack Internal microphone Front panel microphone 

Port C Rear panel microphone jack Microphone jack Rear panel microphone 

Port D Rear panel Line Out jack Line Out jack Rear panel Line Out 

Port E Rear panel Line In jack Line in jack Rear panel Line In 

Port F No connect No connect No connect 

Port G No connect Internal speakers No connect 

Retask Port C N/A Rear panel C/LFE jack Rear panel C/LFE jack 

Retask Port E N/A Rear panel Surround jack Rear panel Surround jack 

Power Sequencing 


 

 

DVDD_3.3 should always come up before AVDD_5V is present. 

DVDD_3.3 must always be removed after AVDD_5V is removed. 

EuP Solution #1: 

Use one of the above platform configurations. Provide 3.3V and 5V system supplies to the codec power. All supplies are removed 

during S5. 



64 

eLQFP 

56 

QFN 

48 QFN 

48 eLQFP 

DVDD_3.3 27 24 21 Digital Supply Voltage. +3.3 V. Connect to system +3.3V 

VAUX_3.3* 2, 6 2, 6 4 Standby Supply Voltage. +3.3 V. +3.3 V. Connect to 

DVDD_3.3. 



AVDD_5V 41 36 31 Analog Supply Input Voltage for LDO. +5.0 V. Connect 

to system +5.0 V supply. 

AVDD_HP 39 34 29 Supply Input Voltage for Headphone Amplifiers. +3.3 V. 

Connect to system +3.3 V. 





LPWR_5.0 20 17 15 Supply Voltage for Class-D Amplifier, Left Channel. 

+5.0 V. Connect to RPWR_5.0. Connect 



*VAUX_3.3: connecting to 3.3V system power disables wake-on jack functionality. 


0W 

Ports C and E in output mode only (5.1) will have pops. Use the anti-pop circuit shown later to block these pops. 



Provide 3.3V standby supply to the codec power pin VAUX_3.3V only. All other power is provided by the system supplies and is 

removed during S5. The Conexant audio driver ensures no audible pops when the supplies are removed. 



64 

eLQFP 

56 

QFN 

48 QFN 

48 eLQFP 

DVDD_3.3 27 24 21 Digital Supply Voltage. +3.3 V. Connect to system +3.3V. 

VAUX_3.3 2, 6 2, 6 4 Standby Supply Voltage. +3.3 V. +3.3 V. Connect to a 

3.3V standby supply. 



AVDD_5V 41 36 31 Analog Supply Input Voltage for LDO. +5.0 V. Connect to 

a +5V system supply. 

AVDD_HP 39 34 29 Supply Input Voltage for Headphone Amplifiers. +3.3 V. 

Connect to system +3.3 V. 





LPWR_5.0 20 17 15 Supply Voltage for Class-D Amplifier, Left Channel. +5.0 

V. Connect to RPWR_5.0. Connect LPWR_5.0/RPWR_5.0 

to system, +5.0 V supply through a 0.1-ohm resistor. 


9.2mW 


CX20561(Hermosa), CX20661(Cocoa) 

Analog Port Configuration 

Codec Port 

Port A 

Port B 

Port C 

Port D 

Stereo Speakers 

Mono Speaker 

2 Channel Desktop 

Front panel headphone jack 

Front panel microphone jack 

Rear panel microphone or Line In jack 

Rear panel Line Out jack (Hermosa only) 

N/A 

Internal speaker via amplifier (Hermosa only) 

Codec Power Sequencing 


 

 

 

DVDD should ramp up before AVDD or at the same time. 

DVDD should ramp down after AVDD or at the same time. 

DVDD should always be present when AVDD is present. Pops will be introduced if this is not followed. 


Use the above platform configuration. Provide 3.3V standby supply to AVDD and DVDD. These supplies are not removed in S5. 


Label CX20561 

Pin Number 

DVDD (or 

DVDD_3.3) 

CX20661 Pin 

Number 

Description/Connection 

3, 44 2 Digital Supply Voltage. +3.3 V. Connect to +3.3V standby supply 

through LC filter. 

AVDD 26, 40 19, 27 Analog Supply Voltage. +3.3 V. Connect to +3.3V standby supply 


VDD_IO 9 7 HD Audio link signaling level. Connect to DVDD or 1.5V+/-5% 

system supply 


11.2mW 


Use the above platform configuration. Provide 3.3V system supply to AVDD and DVDD. These supplies are both removed in S5. 


Label CX20561 

Pin Number 

DVDD (or 

DVDD_3.3) 

CX20661 Pin 

Number 


3, 44 2 Digital Supply Voltage. +3.3 V. Connect to +3.3V system supply 


AVDD 26, 40 19, 27 Analog Supply Voltage. +3.3 V. Connect to +3.3V system supply 


VDD_IO 9 7 HD Audio link signaling level. Connect to DVDD or 1.5V+/-5% 

system supply 


0W 

The Conexant driver will ensure that there are no audible pops when the power rails are removed. There will be a power ON 

pop on Port D (Hermosa only) into external powered speakers. Use the anti-pop circuit shown later to block this pop. The 

pops on Mono Speaker out should not be audible. Designs can use EAPD to control the amplifier shutdown pin (if necessary). 


AD198X/AD188X 

Desktop Analog Port Configurations 

Codec Port 2 Channel All In One 5.1 & 7.1 Discrete 5.1 Retask 

Port A Front panel headphone jack Headphone jack Front panel headphone jack Front panel headphone jack 

Port B Front panel microphone jack Internal microphone Front panel microphone jack Front panel microphone jack 

Port C Rear panel MIC or Line In No connect Rear panel Line In jack Rear panel Line In/Surround 

Port D Rear panel Line Out jack Line Out jack Rear panel Line Out jack Rear panel Line Out jack 

Port E N/A Line in jack Rear panel microphone jack Rear panel microphone/C-LFE 

Port F Rear panel Line In jack Internal speakers Rear panel Back Surround jack N/A 

Port G N/A N/A Rear panel C/LFE out jack N/A 

Port H N/A N/A Rear panel Side Surround jack N/A 

Mono Out Internal speaker via amplifier N/A Internal speaker via amplifier Internal speaker via amplifier 

Codec Power Sequencing 

Power On: Make sure AVDD is up before (or at same time) as DVDD 

Power Off: Make sure to remove AVDD after DVDD 


Use one of the above platform configurations. Provide 3.3V standby supply to the codec analog power pins (AVDD). Connect the 

digital supply (DVDD) to a system rail that is removed in S5. 


Label 

Pin 

Number 


DVDD 9 Digital Supply Voltage. +3.3 V. Connect to +3.3V system supply. 

AVDD 25, 38 Analog Supply Voltage. +3.3 V. Connect to +3.3V standby supply. 

DV IO 4* HD Audio link signaling level. Connect to DVDD or 1.5V+/-5% system supply 

DV GPIO 3* GPIO/SPDIF signal levels. Connect to AVDD. 

* AD1984A/AD1884A/AD1883: Do not have DV GPIO. Also DV IO is on Pin 3. 


13.2mW 


Use one of the above platform configurations. Provide 3.3V system supply to AVDD and DVDD on the codec. The supplies are 

removed during S5. 


Label 

Pin 

Number 


DVDD 9 Digital Supply Voltage. +3.3 V. Connect to +3.3V system supply. 

AVDD 25, 38 Analog Supply Voltage. +3.3 V. Connect to +3.3V system supply. 

DV IO 4* HD Audio link signaling level. Connect to DVDD or 1.5V+/-5% system supply 

DV GPIO 3* GPIO/SPDIF signal levels. Connect to DVDD. 

* AD1984A/AD1884A/AD1883: Do not have DV GPIO. Also DV IO is on Pin 3. 


0W 

Removing AVDD during S5 will result in audible Line Out pops on Port D, F (in Line Out mode only), G, and H into 

external powered speakers. Use the anti-pop circuit shown later to block these pops. 


Anti-Pop Circuit 

Some platform configurations provide codec power from a standby rail that is not removed during S5. With these configurations the 

power consumption is very low and the audio subsystem is very quiet (no audible pops). 

However, the power consumption can be 0W if you drop all the supplies to the codec in S5. The disadvantage of this is it can 

introduce audible pops on some codec’s. These pops are loudest into powered external speakers. The following circuit can be used to 

block these pops. It ensures no audio performance degradation. Current draw from 5V Standby rail is approximately 1µAmp; power 

consumption is essentially 0W.

HD-Audio AD1882A EuP APN-202304-002.pdf - Codico

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