Handheld Multimedia I2S Audio Codec

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Lead Time 52 weeks
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The ALC5624 is a highly-integrated I2S/PCM interface audio codec with multiple input/output ports and is designed for mobile computing and communications. It provides a stereo DAC for playback, and a stereo ADC for recording via the I2S/PCM interface.

Stereo audio functions are supported via the I2S/PCM configurable interface. To reduce component count, the device can connect directly to:

• MONO or stereo differential analog inputs
• Stereo headphone
• Single-end or BTL MONO output
• MONO or Stereo Bridge-Tied Load (BTL) speaker

Multiple analog input and output pins are provided for seamless integration with analog connected wireless communication devices. Differential input/output connections efficiently reduce noise interference, providing better sound quality. Class-AB or Class-D amplifiers are easily swapped via simple register configuration, and the 1 Watt speaker removes the need for an additional amplifier, further cutting both cost and required board area. Additionally, a flexible hardware 5-band equalizer with configurable gain, bandwidth, and center frequency, and enriches the sound experience.

To extend battery life, each section of the device can be powered down individually under software control. Leakage current in maximum power saving state is less than 10µA. The ALC5624 digital power operates at supply voltages from 1.8 to 3.6Volts, analog power operates at supply voltages from 2.3 to 3.6Volts, and speaker power operates from 2.3V to 5V.

The ALC5624 is available in a 7x7mm ‘Green’ QFN package, making it ideal for use in handheld portable systems.


• Tablet PC system/Ultra-Mobile PC (UMPC)
• GPS/Personal Navigation Device (PND) or Multi-Media phone
• PDA Phone/Smartphone
• Personal Media Player (PMP)

Symmetry Electronics (and its e-commerce division: SemiconductorStore.com) is an authorized Realtek distributor.


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High Performance I2S Codec
- 16-bit stereo DAC SNR 90dB, THD+N -85dB
- 16-bit stereo ADC SNR 85dB, THD+N -80dB
One analog stereo input (LINE-IN)
One analog MONO single-ended or differential input (PHONE and PHONEN input)
Stereo, single-ended MONO, or differential analog microphone inputs, with boost pre-amplifiers (+20/+30/+40dB)
BTL (Bridge-Tied Load) Max. output with on-chip 1W speaker driver (SPKVDD=5V, 8O load)
Stereo headphone output with on-chip 45mW headphone driver (HPVDD=3.3V, 16O load)
25mW SE or 75mW BTL MONO output support (AVDD=3.3V, 32O load)
Microphone switch detection
Power management and enhanced power saving
Supports digital 5 band equalizer (EQ)
Supports digital spatial sound and pseudo stereo effect
Supports pop noise suppression
Internal PLL can receive wide range of clock input (Digital IO power > 1.8V)
Digital power supplies from 1.8V to 3.6V, speaker amplifier power supplies from 2.3V to 5V
Analog power and headphone power supplies from 2.3V to 3.6V
7 x 7mm 48-pin QFN package


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