AK4642EN 参数 Datasheet PDF下载

ASAHI KASEI

[AK4642EN]

AK4642EN

Stereo CODEC with MIC/HP/SPK-AMP

GENERAL DESCRIPTION

The AK4642 features a stereo CODEC with a built-in Microphone-Amplifier, Headphone-Amplifier and

Speaker-Amplifier. Input circuits include a Microphone-Amplifier and an ALC (Auto Level Control) circuit

that is suitable for portable application with recording/playback function. The AK4642 is available in a

32pin QFN, utilizing less board space than competitive offerings.

FEATURES

1. Recording Function

•

Stereo Mic Input (Full-differential or Single-ended)

•

Stereo Line Input

•

MIC Amplifier (+32dB/+26dB/+20dB or 0dB)

•

Digital ALC (Automatic Level Control)

(+36dB

∼ −54dB,

0.375dB Step, Mute)

•

ADC Performance: S/(N+D): 83dB, DR, S/N: 86dB (MIC-Amp=+20dB)

S/(N+D): 88dB, DR, S/N: 95dB (MIC-Amp=0dB)

•

Wind-noise Reduction Filter

•

Stereo Separation Emphasis

2. Playback Function

•

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

•

Digital Volume (+12dB

∼ −115.0dB,

0.5dB Step, Mute)

•

Digital ALC (Automatic Level Control)

(+36dB

∼ −54dB,

0.375dB Step, Mute)

•

Stereo Separation Emphasis

•

Stereo Line Output

- Performance: S/(N+D): 88dB, S/N: 92dB

•

Stereo Headphone-Amp

- S/(N+D): 70dB, S/N: 90dB

- Output Power: 62mW@16Ω (HVDD=3.3V)

- Pop Noise Free at Power ON/OFF

•

Mono Speaker-Amp

- S/(N+D): 50dB@240mW, S/N: 90dB

- BTL Output

- Availbable for both Dynamic and Piezo Speaker

- Output Power: 400mW@8Ω (HVDD=3.3V)

3.0Vrms@50Ω (HVDD=5V)

•

Analog Mixing: Mono Input

3. Power Management

4. Master Clock:

(1) PLL Mode

•

Frequencies:

11.2896MHz, 12MHz, 12.288MHz, 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

MS0420-E-00

-1-

2005/09