AK4685EQ 参数 Datasheet PDF下载

[AK4685]

AK4685

Multi-channel CODEC with Differential Analog I/O

GENERAL DESCRIPTION

The AK4685 is a single chip CODEC that integrates 4-channel ADC, 2-channel DAC and a stereo capacitor

less headphone amplifier.

The converters are designed with an Enhanced Dual Bit architecture for the

ADC, and an Advanced Multi-Bit architecture for the DAC’s, enabling very low noise performance and

achieving wide dynamic range. The differential analog inputs and outputs cancel noise on analog signal

lines. Therefore, a stable system can be designed. The AK4685 has a dynamic range of 102dB for ADC,

106dB for DAC, and is well suited for digital TV and home theater systems.

FEATURES

Asynchronous ADC/DAC1/DAC2 Operation

4ch 24bit ADC

- Differential Input

- 64x Oversampling

- Sampling Rate up to 48kHz

- Linear Phase Digital Anti-Alias Filter

- S/(N+D): 90dB

- Dynamic Range, S/N: 102dB

- Digital HPF for Offset Cancellation

- Channel Independent Digital Volume (+24/-103dB, 0.5dB/step)

- Soft Mute

Two 2ch 24bit DAC’s

- Differential/Single-end Ouput (DAC1)

- 128x Oversampling

- Sampling Rate up to 192kHz

- 24bit 8 times Digital Filter

- S/(N+D): 92dB

- Dynamic Range, S/N: 106dB

- Channel Independent Digital Volume (+12/-115dB, 0.5dB/step)

- Soft Mute

40mW Capless Stereo Headphone Amplifier

- Output Power: 1.21Vrms @ 3.3V, THD+N(min) = -40dB

- Dynamic Range, S/N: 96dB

- Pop Noise Free at Power-ON/OFF and Mute

Independent Mute Pins for 2 lines

High Jitter Tolerance

TTL Level Digital I/F

External Master Clock Input:

256fs, 384fs, 512fs 768fs (fs=32kHz

∼

48kHz)

128fs, 192fs, 256fs 384fs (fs=64kHz

∼

96kHz)

128fs, 192fs (fs=120kHz ~ 192kHz)

Audio Serial I/F (PORTA/B/C)

- Master/Slave mode (PORTB)

- I/F format : MSB justified, I

2

S

MS1106-E-00

-1-

2009/08