AK4649 参数 Datasheet PDF下载

[AK4649]

AK4649

24bit Stereo CODEC with MIC/SPK-AMP

GENERAL DESCRIPTION

The AK4649 features a stereo CODEC with a built-in Microphone-Amplifier and Speaker-Amplifier. Input

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

include a Speaker-Amplifier. These circuits are suitable for portable application with recording/playback

function. The AK4649 is available in a 29pin CSP (3x3.3mm 0.5mm pitch), utilizing less board space than

competitive offerings.

FEATURES

1. Recording Function

•

Stereo Single-ended input with two Selector

•

MIC Amplifier

(+29dB/+26dB/+23dB/+20dB/+16dB/+12dB/+9dB/+6dB/+3dB/0dB)

•

Digital ALC (Automatic Level Control)

- Setting Range: +36dB

∼ −54dB,

0.375dB Step

- Noise Suppression

•

ADC Performance: S/(N+D): 80dB, DR, S/N: 89dB (MIC-Amp=+20dB, AVDD=3.3V)

S/(N+D): 80dB, DR, S/N: 100dB (MIC-Amp=0dB, AVDD=3.3V)

•

Wind-noise Reduction Filter

•

5 Band Notch Filter

•

Stereo Separation Emphasis

•

Digital MIC Interface

2. Playback Function

•

Digital De-emphasis Filter (tc=50/15μs, fs=32kHz, 44.1kHz, 48kHz)

•

Digital ALC (Automatic Level Control)

- Setting Range: +36dB

∼ −54dB,

0.375dB Step

- Noise Suppression

•

Digital Volume Control:

- 0dB

∼ −18dB,

6dB Step & 256 Linear Step (+0dB

∼

- 48.13dB & Mute)

•

Stereo Separation Emphasis

•

Stereo Line Output

- S/(N+D): 87dB, S/N: 97dB

•

Mono Speaker-Amp

- SPK-AMP Performance: S/(N+D): 60dB@150mW, S/N: 98dB

- BTL Output

- Output Power: 400mW@8Ω (SVDD=3.3V)

•

Analog Mixing: Mono Input

3. Power Management

4. Master Clock:

(1) PLL Mode

•

Frequencies: 11.2896MHz, 12MHz, 13.5MHz, 24MHz, 27MHz (MCKI pin)

1fs (LRCK pin)

32fs or 64fs (BICK pin)

(2) External Clock Mode

•

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

5. Output Master Clock Frequencies: 32fs/64fs/128fs/256fs

•

PLL Slave Mode (LRCK 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

MS1023-E-01

-1-

2010/08