ASAHI KASEI

[AK5356]

MS0171-E-00

2002/08

- 1 -

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

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

Low Power 20-Bit ADC with MIC-Amp & PGA

AK5356