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GENERAL DESCRIPTION

AK4561 is a 16bit stereo CODEC with a built-in Microphone-Amp, Headphone-Amp. Input circuits include Microphone/LINE inputs selector, power supply for microphone, Pre-Amp, HPF-Amp, EQ-Amp and ALC (Automatic Level Control) circuit, and output circuits include LINEOUT buffer, Analog Volume and Headphone-Amp. As Multi-Power-Supply-System can be set a suitable power supply voltage in each block, the AK4561 is compatible with high performance and low power dissipation. The package is a 64pin TQFP, therefore, a new system can be a smaller board area than a current system is composed of 2 or 3 chips.

FEATURE

1. Resolution: 16bits

2. Recording Function

? 3-Input Selector (Internal MIC, External MIC and LINE)

? MIC-Amp

- Pre-Amp, EQ-Amp, HPF-Amp for wind-noise

? Digital ALC (Automatic Level Control) circuit

? FADEIN/FADEOUT

? Digital Delay circuit

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

3. Playback Function

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

? LINEOUT Buffer: +2dBV

? Analog Volume

- 0dB ~ -50dB, Mute

? Headphone-Amp

- Output Level: -5.5dBV@VA=2.8V, RL=55W

? Monaural Output Buffer

? BEEP Signal Input

4. Analog Through Mode

5. Power Management

6. ADC Characteristics (LINEIN ? ALC ? ADC)

? S/(N+D): 78dB, DR=S/N: 86dB

7. DAC Characteristics (DAC ? LINEOUT)

? S/(N+D): 76dB, DR=S/N: 88dB

8. Master Clock: 256fs/384fs

9. Sampling Rate: 8kHz ~50kHz

10. Audio Data Interface Format: MSB-First, 2’s compliment (AK4550 Compatible)

? ADC: 16bit MSB justified, DAC: 16bit LSB justified

11. Ta = -20 ~ 85°C

12. Power Supply

? CODEC, Analog Volume, Headphone-Amp: 2.6 ~ 3.3V (typ. 2.8V)

? LINEOUT: 3.8 ~ 5.5V (typ. 4.5V)

? MIC-Amp: 2.6 ~ 5.0V (typ. 2.8V)

? Digital I/F: 1.8 ~ 3.3V (typ. 2.8V)

13. Power Supply Current

? All Circuit Power On: 37mA

14. Package: 64pin TQFP, 0.4mm Pitch