GENERAL DESCRIPTION

The AK5356 is a low voltage 20bit A/D converter for digital audio system. The AK5356 also includes microphone amplifier and analog input PGA, making it suitable for microphone applications or low-input signal levels. As digital power supply of the AK5356 corresponds to 1.8V, the interface with microprocessor can operate at low voltage. The AK5356 is housed in a space-saving 28-pin QFN package.

FEATURES

1. MIC Block

· MIC Power

· Pre-Amplifier (+13dB / +18dB / +28dB / +33dB)

2. 20bit 2ch ADC

· 2-Input Stereo Selector

· Analog Input PGA: +28dB ~ - 52dB, Mute

· S/(N+D): 84dB

· DR, S/N: 89dB

· Monaural Mixing

· Digital HPF for DC-offset cancellation (fc=3.4Hz@fs=44.1kHz)

3. 3-wire Serial Control I/F

4. Master Clock: 256fs/384fs

5. Audio Data Format: MSB First, 2’s compliment

· 16/20bit MSB justified or 16/20bit I2S compatible

6. Power Supply Voltage

· AVDD: 2.0 ~ 3.3V

· MVDD: 2.4 ~ 3.3V

· DVDD: 1.8 ~ 3.3V

7. Power Supply Current

· MIC Block: 3.4mA

· IPGA+ADC: 6mA

8. Ta = - 40 ~ 85°C

9. Package: 28pin QFN