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ALC221
(P/N: ALC221-GR)
HIGH DEFINITION AUDIO CODEC WITH
MONO CLASS-D SPEAKER AMPLIFIER
DATASHEET
Version 0.65
25th May 2011
Realtek Semiconductor Corp.
No. 2, Innovation Road II, Hsinchu Science Park, Hsinchu 300, Taiwan
Tel.: +886-3-578-0211. Fax: +886-3-577-6047
www.realtek.com
ALC221
Datasheet
9.1.2. Threshold Voltage .................................................................................................................................................63
9.1.3. Digital Filter Characteristics ...............................................................................................................................64
9.1.4. S/PDIF Output Characteristics ............................................................................................................................64
9.2. AC CHARACTERISTICS...............................................................................................................................................65
9.2.1. Link Reset and Initialization Timing.....................................................................................................................65
9.2.2. Link Timing Parameters at the Codec ..................................................................................................................66
9.2.3. S/PDIF Output Timing..........................................................................................................................................67
9.3. ANALOG PERFORMANCE ............................................................................................................................................68
9.4. CLASS-D POWER AMPLIFIER PERFORMANCE .............................................................................................................69
10. APPLICATION CIRCUITS .......................................................................................................................................70
10.1.
10.2.
10.3.
FILTER CONNECTION..................................................................................................................................................70
POWER AND JACK CONNECTION.................................................................................................................................71
S/PDIF-OUT CONNECTION .......................................................................................................................................71
11. MECHANICAL DIMENSIONS (QFN-48) ....................................................................................................................72
11.1. MECHANICAL DIMENSIONS NOTES ............................................................................................................................73
12. ORDERING INFORMATION ...................................................................................................................................74
High Definition Audio Codec with Embedded
Mono Class-D Speaker Amplifier
v
Rev. 0.65
ALC221
Datasheet
Enhanced power management features for normal operation and standby mode
Mono Bridge-Tied Load Class-D amplifier at port-H (MONO-OUT) has 2Watt (rms) power for 4Ω
load speaker
Short circuit and over current protections for Class-D amplifier
Class D amplifier has high pass filter with selectable Cut-Off frequency to prevent low frequency
signal damaging speaker
Class D amplifier output with slew rate and spread spectrum control to reduce EMI radiation
Intel low power ECR HDA015-B compliant: supports power status control, jack detection, and
wake-up event in D3 mode
2 GPIOs (General Purpose Input and Output) pins for customized applications
EAPD (External Amplifier Power Down) is supported
Supports Anti-pop mode when analog power AVDD is on and digital power is off
Built in a 5V-to-4.5V LDO to power analog circuitry
Power support: 3.3V digital core power; 1.5V~3.3V digital IO power for HDA link; 4.5V~5.5V
analog power; 4.5V~5.5V power stage voltage
48-pin QFN ‘Green’ package
High Definition Audio Codec with Embedded
Mono Class-D Speaker Amplifier
3
Rev. 0.65