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AK4564

16bit CODEC with built-in ALC and MIC/HP/SPK-Amp

Asahi Kasei Microdevices 

ASAHI KASEI

[AK4564]

AK4564

16bit CODEC with built-in ALC and MIC/HP/SPK-Amp

GENERAL DESCRIPTION

The AK4564 is a 16bit stereo CODEC with a built-in Microphone-Amp, Headphone-Amp and Speaker-Amp.

AK4564 has new recording features, a digital equalizer for microphone inputs and a digital ALC (Automatic

Level Control). The playback features also include LINEOUT-Amp, digital volume, Headphone-Amp and

Speaker-Amp. The AK4564 suits a portable application with a built-in LCD and etc. The AK4564 is housed in a

space-saving 48pin LQFP package.

FEATURE

1. Resolution: 16bits

2. Recording Function:

• 4-Input Selector (Internal MIC, External MIC, LINE x 2)

• Pre-Amp

• Digital EQ/HPF/LPF

• Digital ALC (Automatic Level Control) circuit

• FADEIN / FADEOUT

• Digital HPF for offset cancellation (fc=3.7Hz@fs=48kHz)

• Enable mixing of BEEP signal

3. Playback Function

• Digital De-emphasis Filter (tc = 50/15µs, fs = 32kHz, 44.1kHz and 48kHz)

• LINEOUT-Amp

• Digital Volume: 0dB ∼ - 65.25dB, Mute

• Headphone-Amp

- Po: 5.3mW @ 16 Ω (AVDD = 2.8V)

• Speaker-Amp with built-in ALC

- BTL Output

- Po: 80mW @ 8 Ω

• Enable mixing of BEEP signal

4. Power Management

5. ADC characteristics (LIN → ADC)

• S/(N+D): 87dB, DR=S/N: 90dB

6. DAC characteristics (DAC → LINEOUT-Amp)

• S/(N+D): 82dB, DR=S/N: 88dB

7. Master Clock: 256fs/384fs

8. Sampling Rate: 8kHz ∼50kHz

9. Audio Data Interface Format: MSB-First, 2’s compliment

• ADC, DAC: 16bit MSB justified, 16bit LSB justified, I2S

10. Ta = -20 ∼ 85 °C

11. Power Supply Voltage

• CODEC, Speaker-Amp: 2.6 ∼ 3.6V

• MIC/Headphone/LINEOUT-Amp: 2.6 ∼ 5.5V

12. Power Supply Current

• All Power On: 30.5mA

13. Package: 48pin LQFP, 0.5mm Pitch

MS0140-E-01

-1-

2002/07

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