Audio Processor with 24-Bit 3ch ADC/ 6ch DAC/ 2ch SRC

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AK7601A is a high feature audio processor with audio CODEC (3ch ADC, 6ch DAC) and delay line memory operates 5.0V single power supply. The analog inputs support quasi-differential/single-ended with 4:1 stereo selector in front of 2-channeled 97dB ADC, and monaural ADC for guidance sound. The digital inputs supports 3:1 input selector with asynchronous Sample Rate Converter (SRC) for digital source such as DVD, Blu-ray, digital broadcasting, etc.  The high performance 6-channeled DAC integrates full-range digital volume control and achieves 102dB with single end outputs. The delay line memory covers 36ms in total. Time alignment of 6m or less is possible since the delay line memory can store for 18ms data for both left and right channels. The AK7601A can achieve high performance car audio system easily by supporting two stereo 7-band EQ and time alignment functions.

Key Features

· Applications: Car Audio and Home Audio Systems

· 2ch 24bit ADC

- Quasi-Differential/Single-ended inputs with 4:1 Stereo Selector

- S/(N+D): 90dB

- DR, S/N: 97dB

- Digital HPF for cancelling DC offset

· 1ch 24bit ADC for Monaural Audio Input

- Single-ended input

- S/(N+D): 90dB

- DR, S/N: 97dB

- Digital HPF for cancelling DC offset

· 6ch 24bit DAC

- Single-ended output

- S/(N+D): 90dB

- DR, S/N: 102dB

· Asynchronous Sample Rate Converter(SRC) for Digital Input

-  3:1 Input Selector

- Input Sampling Rate: 8kHz ~ 96kHz

- Data Format: MSB justified, LSB justified, I2S compatible (slave mode only)

· Digital Processing

- Two Stereo 7Band EQ (Second-order IIR-filter setting is also available)

- Digital De-emphasis Filter

- Adjustable Delay Memory Control

Maximum Delay Time:

Lch 18ms, Rch 18ms (for 1 stereo input / 3 stereo outputs)

Delay Resolution: 1/fs

- X’Over filter:

Front L, Front R: 2nd order IIR Filter x 3 stages

Rear L, Rear R, Subwoofer L, Subwoofer R: 2nd order IIR Filter x 2 stages

- Spectrum analyzer: Variable 4-Band

- Soft Mute

- Zero Detect Function

· Smooth Volume

· Master Clock

- Master Mode: 22.5792MHz

· mP Interface: I2C Bus (Ver 1.0, 400kHz mode)

· Power Supply

- Analog: AVDD = 4.5 ~ 5.5V

- Digital: DVDD = 3.0 ~ 5.5V

· Power Consumption: 80mA

· Ta = - 40 ~ 85°C

· Package: 48pin LQFP(0.5mm pitch)

· Evaluation Board: AKD7601A

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