Low Power 1ch ADC & 1ch DAC with ALC and MIC/SPK-Amp

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  • Evaluation Board Manual
  • Data Sheet


The AK4633 is a 16-bit mono CODEC with Microphone-Amplifier and Speaker-Amplifier. Input circuits include a Microphone-Amplifier and an ALC (Automatic Level Control) circuit. Output circuits include a Speaker-Amplifier and Mono Line Output. The AK4633 suits a moving picture of Digital Still Camera and etc. This speaker-Amplifier supports a Piezo Speaker. The AK4633 is housed in a space-saving 24-pin QFN package.

Key Features

1. 16-Bit Delta-Sigma Mono CODEC

2. Recording Function

• 1ch Mono Input

• 1st MIC Amplifier: 0dB, 6dB, 10dB, 14dB, 17dB, 20dB, 26dB or 32dB

• 2nd Amplifier with ALC: +36dB to -54dB, 0.375dB Step, Mute

• ADC Performance (MIC-Amp= +20dB): S/(N+D): 84dB, DR, S/N: 85dB

• Wind Noise Reduction

• Notch Filter

3. Playback Function

• Digital ALC (Automatic Level Control): +36dB to -54dB, 0.375dB Step, Mute

• Mono Line Output Performance: S/(N+D): 85dB, S/N: 93dB

• Mono Speaker-Amp

- Speaker-Amp Performance

S/(N+D): 60dB (150mW@ 8Ω)

Output Noise Level: -87dBV

- BTL Output

- Output Power: 400mW @ 8Ω

• Beep Input

4. Power Management

5. Flexible PLL Mode:

• Frequencies:

11.2896MHz, 12MHz, 12.288MHz, 13.5MHz, 24MHz, 27MHz (MCKI pin)

1fs (FCK pin)

16fs, 32fs or 64fs (BICK pin)

6. EXT Mode:

• Frequencies: 256fs, 512fs or 1024fs (MCKI pin)

7. Sampling Rate:

• PLL Slave Mode (FCK pin) : 7.35kHz to 48kHz

• PLL Slave Mode (BICK pin) : 7.35kHz to 48kHz

• PLL Slave Mode (MCKI pin):

8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz

• PLL Master Mode:

8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz

• EXT Slave Mode/EXT Master Mode:

7.35kHz to 48kHz (256fs), 7.35kHz to 26kHz (512fs), 7.35kHz to 13kHz (1024fs)

8. Output Master Clock Frequency: 256fs

9. Serial µP Interface: 3-wire

10. Master / Slave Mode

11. Audio Interface Format: MSB First, 2’s complement

• ADC: DSP Mode, 16bit MSB justified, I2S

• DAC: DSP Mode, 16bit MSB justified, 16bit LSB justified, I2S

12. AK4633VN: Ta = -40 to 85°C

AK4633EN: Ta = -30 to 85°C

13. Power Supply

• AVDD: 2.2 to 3.6V (typ. 3.3V)

• DVDD: 1.6 to 3.6V (typ. 3.3V)

• SVDD: 2.2 to 4.0V (typ. 3.3V)

14. Power Supply Current: 12mA (All Power ON)

15. Package: 24pin QFN(4mmx4mm)

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Block Diagram

Block Diagram

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