AK4634EN

Low Power 1ch ADC & 1ch DAC with MIC/Class-D SPK Amp

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  • Evaluation Board Manual
  • Data Sheet

Description

The AK4634 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 AK4634 is suitable for a moving picture of Digital Still Camera and etc. This speaker-Amplifier supports a Piezo Speaker. The AK4634 is housed in a space-saving 32-pin QFN 5mm x 5mm package and 29-pin CSP 2.5mm x 3mm package.

Key Features

1. 16-Bit Delta-Sigma Mono CODEC

2. Recording Function

• 1ch Mono Input

• MIC Amplifier: (0dB/+3dB/+6dB/+10dB/ +17dB/+20dB/+23dB/+26dB/+29dB/+32dB)

• Digital ALC (Automatic Level Control)

(+36dB to -54dB, 0.375dB Step, Mute)

• ADC Performance (MIC-Amp=+20dB)

- S/(N+D): 84dB

- DR, S/N: 86dB

• Wind-noise Reduction Filter

• 5 band notch Filter

3. Playback Function

• Digital ALC (Automatic Level Control)

(+36dB to -54dB, 0.375dB Step, Mute)

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

• Mono Class-D Speaker-Amp

- BTL Output

- Output Power: 400mW @ 8Ω (SVDD=3.3V)

- S/(N+D): 55dB (150mW@8Ω)

• Beep Generator

4. Power Management

5. PLL Mode:

• Frequencies:

12MHz, 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, I2C Bus (Ver 1.0, 400kHz High Speed Mode)

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. Ta = - 40 to 85°C (AK4634VN), -30 to 85°C (AK4634EN/ECB)

13. Power Supply

• Analog Supply (AVDD): 2.2 to 3.6V

• Digital Supply (DVDD): 1.6 to 3.6V

• Speaker Supply (SVDD): 2.2 to 4.0V

14. Package: 32pin QFN, 5mm x 5mm, 0.5mm pitch (AK4634EN/VN)

29pin CSP, 2.5mm x 3.0mm, 0.5mm pitch (AK4634ECB)

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Block Diagram

Block Diagram

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