GENERAL DESCRIPTION

AK4584 is a high-performance 24-bit CODEC for 96kHz consumer audio and digital recording applications. The on-board analog-to-digital converter has an impressive dynamic range, thanks in part to AKM’s Enhanced Dual-Bit architecture. The DAC features the newly developed Advanced Multi-Bit architecture and achieves low out-of-band noise and high jitter tolerance through the use of Switched Capacitor Filter (SCF) technology

FEATURES

1. 24bit 2ch ADC

• fs: max 96kHz

• Single-end Input

• S/(N+D): 90dB

• Dynamic Range, S/N: 100dB

• Digital HPF for offset cancellation

• Input PGA with +18dB gain & 0.5dB step

• Input DATT with –72dB ATT

• I/F format: MSB justified or I2S

2. 24bit 2ch DAC

• fs: max 192kHz

• 24bit 8 times Digital Filter - Ripple: ±0.005dB, Attenuation: 75dB

• Single-end Output

• S/(N+D): 94dB

• Dynamic Range, S/N: 104dB

• De-emphasis for 32kHz, 44.1kHz, 48kHz sampling

• Digital Attenuator with soft-transition

• Soft Mute

• Zero Detect Function

• I/F format: MSB justified, LSB justified or I2S

3. 3 Outputs 24 bit 192kHz DIT

• 3-Channel Transmission Outputs (2 Through outputs & DIT Output)

• 40 bits Channel Status Buffer

4. 4 Inputs 24bit 192kHz DIR

• Supports AES3, IEC60958, S/PDIF, EIAJ CP1201

• Low Jitter Analog PLL

• PLL Lock Range: 32k ∼ 192kHz

• Clock Source: PLL or X’tal

• 4 Digital Receive Channel inputs

• Detect Function

- Non-PCM Bit Stream Detection

- DTS-CD Bit Stream Detection

- Validity Flag Detection

- Sampling Frequency Detection

- Unlock & Parity Error Detection

• 40 bits Channel Status Buffer

• Burst Preamble bit Pc, Pd Buffer for Non-PCM bit Stream

5. Support External Audio Clock Input

• Master Clock Input

- 256fs, 384fs, 512fs, 768fs (fs = 44.1kHz ∼ 48kHz)

- 256fs, 384fs (fs = 88.2kHz ∼ 96kHz)

- 128fs, 192fs (fs = 176.4kHz ∼ 192kHz)

6. Support Master & Slave Mode

7. Serial µP I/F: 4-wire serial

8. 5V operation

9. 3V Power Supply Pin for 3V I/F

10. 44pin LQFP Package

11. Ta: −10 to 70°C