AK4634 参数 Datasheet PDF下载

[AK4634]

= Preliminary =

AK4634

16-Bit Mono CODEC with ALC & MIC/SPK-AMP

GENERAL DESCRIPTION

The AK4634 is a 16-bit mono CODEC with Microphone-Amplifier and Speaker-Amplifier. Input circuits

include a Microphone-Amplifier and an ALC (Automatic Level Control) circuit. Output circuits include a

Speaker-Amplifier and Mono Line Output. The AK4634 is suitable for a moving picture of Digital Still

Camera and etc. This speaker-Amplifier supports a Piezo Speaker. The AK4634 is housed in a

space-saving 32-pin QFN 5mm x 5mm package.

FEATURE

16-Bit Delta-Sigma Mono CODEC

Recording Function

•

1ch Mono Input

•

MIC Amplifier: (0dB/+3dB/+6dB/+10dB/ +17dB/+20dB/+23dB/+26dB/+29dB/+32dB)

•

Digital ALC (Automatic Level Control)

(+36dB

∼

-54dB, 0.375dB Step, Mute)

•

ADC Performance (MIC-Amp=+20dB)

- S/(N+D): 84dB

- DR, S/N: 86dB

•

Wind-noise Reduction Emphasis

•

5 band notch Filter

Playback Function

•

Digital ALC (Automatic Level Control)

(+36dB

∼

-54dB, 0.375dB Step, Mute)

•

Mono Line Output: S/(N+D) : 85dB, S/N : 93dB

•

Mono Class-D Speaker-Amp

- BTL Output

- Output Power: 400mW @ 8Ω (SVDD=3.3V)

- S/(N+D): 55dB (150mW@8Ω)

•

Beep Generator

Power Management

PLL Mode:

•

Frequencies:

12MHz, 13.5MHz, 24MHz, 27MHz (MCKI pin)

1fs (FCK pin)

16fs, 32fs or 64fs (BICK pin)

EXT Mode:

•

Frequencies: 256fs, 512fs or 1024fs (MCKI pin)

Sampling Rate:

•

PLL Slave Mode (FCK pin): 7.35kHz

~

48kHz

•

PLL Slave Mode (BICK pin): 7.35kHz

~

48kHz

•

PLL Slave Mode (MCKI pin):

8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz

•

PLL Master Mode:

8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz

•

EXT Slave Mode / EXT Master Mode:

7.35kHz

~

48kHz (256fs), 7.35kHz

~

26kHz (512fs), 7.35kHz

~

13kHz (1024fs)

Output Master Clock Frequency: 256fs

Serial

μP

Interface: 3-wire, I2C Bus (Ver 1.0, 400kHz High Speed Mode)

2007/10

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Rev. 0.5