24-Bit 96kHz/192kHz CODEC with DIT/DIR and IPGA

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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. The AK4584 also has a S/PDIF-AES/EBU digital audio transmitter (DIT) and a digital audio receiver (DIR) that are compatible with 24-bit, 192kHz formats. The AK4584 can automatically detect NON-PCM bit streams like AC-3, MPEG and DTS. Either the ADC or the digital audio input can be routed directly to the digital audio output. The AK4584 has an input Programmable Gain Amplifier and is well suited for computer DAWs, MiniDisc, DVD-R, hard disk and CD-R recording/playback systems.

*AC-3 is a trademark of Dolby Laboratories. DTS is a trademark of Digital Theater Systems, Inc.

Key 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 to 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 to 48kHz)

- 256fs, 384fs (fs = 88.2kHz to 96kHz)

- 128fs, 192fs (fs = 176.4kHz to 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

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