Low Power & Small Package 48kHz 16-Bit CODEC

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The AK4554 is a low voltage 16bit A/D & D/A converter for portable digital audio system. In the AK4554, the loss of accuracy form clock jitter is also improved by using SCF techniques for on-chip post filter. Analog signal input/output of the AK4554 are single-ended, therefore, any external filters are not required. The AK4554 is suitable for portable digital audio system, as the AK4554 is low power dissipation and a small package.

Key Features

• HPF for DC-offset cancel (fc=3.4Hz)

• Single-ended ADC

- S/(N+D): 80dB@VDD=2.5V

- Dynamic Range, S/N: 89dB@VDD=2.5V

• Single-ended DAC

- Digital de-emphasis for 32kHz, 44.1kHz, 48kHz sampling

- S/(N+D): 85dB@VDD=2.5V

- Dynamic Range, S/N: 92dB@VDD=2.5V

• Audio I/F format: MSB First, 2’s Compliment (AK4550 compatible)

- ADC: 16bit MSB justified

- DAC: 16bit LSB justified

• Input/Output Voltage: 0.6 x VDD (=1.5Vpp@VDD=2.5V)

• High Jitter Tolerance

• Sampling Rate: 8kHz to 50kHz

• Master Clock: 256fs/384fs/512fs/768fs (fs=8kHz to 50kHz)

1024fs (fs=8kHz to 25kHz)

• Power Supply: 1.6 to 3.6V

• Low Power Supply Current: 8mA

• Ta = -40 to 85°C

• Very Small Package: 16pin TSSOP

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Block Diagram

Block Diagram

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