104dB/108dB 192kHz 24-Bit 6ch ADC & 8ch DAC

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The AK4612 is a single chip audio CODEC that includes six ADC channels and eight DAC channels. The converters are designed with Enhanced Dual Bit architecture for the ADC’s, and Advanced Multi-Bit architecture for the DAC, enabling very low noise performance. Fabricated on a low power process, the AK4612 operates off of a +3.3V analog supply and a +1.8V digital supply. The AK4612 supports both single-ended and differential inputs and outputs. A wide range of applications can be realized, including home theater, pro audio and car audio. The AK4612 is available in an 80-pin LQFP package.

Key Features

1. 6channel 24bit ADC

- 128x Oversampling

- Linear Phase Digital Anti-Alias Filter

- Analog Anti-Alias Filter for Single-Ended Input and Differential Input

- ADC S/(N+D)

92dB: Single-Ended Input

97dB: Differential Input


103dB: Single-Ended Input

104dB: Differential Input

- Digital HPF for offset cancellation

- I/F format: MSB justified, I2S or TDM

- Overflow flag

2. 8channel 24bit DAC

- 128x Oversampling

- Linear Phase 24bit 8 times Digital Filter

- Analog Smoothing Filter for Single-Ended Output

- DAC S/(N+D)

94dB: Single-Ended Output

100dB: Differential Output


105dB: Single-Ended Output

108dB: Differential Output

- Individual channel digital volume with 256 levels and 0.5dB steps

- Soft mute

- De-emphasis for 32kHz, 44.1kHz and 48kHz

- Zero Detect Function

- I/F format: MSB justified, LSB justified (16bit, 20bit, 24bit), I2S or TDM

3. Sampling Frequency

- Normal Speed Mode: 32kHz to 48kHz

- Double Speed Mode: 64kHz to 96kHz

- Quad Speed Mode: 128kHz to 192kHz

4. Master / Slave mode

5. Master clock

- Slave mode: 256fs, 384fs or 512fs (Normal Speed Mode: fs=32kHz to 48kHz)

256fs (Double Speed Mode: fs=64kHz to 96kHz)

128fs (Quad Speed Mode: fs=128kHz to 192kHz)

- Master mode: 256fs or 512fs (Normal Speed Mode: fs=32kHz to 48kHz)

256fs (Double Speed Mode: fs=64kHz to 96kHz)

128fs (Quad Speed Mode: fs=128kHz to 192kHz)

6. 4-wire Serial and I2C Bus µP I/F for mode setting

7. Power Supply

- Analog Power Supply: AVDD1, AVDD2 = 3.0 to 3.6V

- Digital Power Supply: DVDD = 1.6 to 2.0V

- I/O Buffer Power Supply: TVDD1, TVDD2 = 1.6 to 3.6V

8. Power Supply Current: 98mA (fs=48kHz)

9. Ta = -20 to 85ºC (AK4612EQ), - 40 to 105ºC (AK4612VQ)

10. Package: 80pin LQFP (0.5mm pitch)

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Block Diagram

Block Diagram

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