AK4537VN 参数 Datasheet PDF下载

ASAHI KASEI

[AK4537]

AK4537

16-Bit

∆Σ

Stereo CODEC with MIC/HP/SPK-AMP

GENERAL DESCRIPTION

The AK4537 targeted at PDA and other low-power, small size applications. It features a 16-bit 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. The AK4537 is available in a

52-QFN, utilizing less board space than competitive offerings.

FEATURES

1. Resolution : 16bits

2. Recording Function

•

Stereo Mic Input

•

Stereo Line Input

•

1

st

MIC Amplifier : +20dB or 0dB

•

2

nd

Amplifier with ALC

+27.5dB

∼

-8dB, 0.5dB Step (MIC input)

+12dB

∼

-23.5dB, 0.5dB Step (LINE input)

•

ADC Performance : S/(N+D) : 79dB, DR, S/N : 83dB (MIC input)

S/(N+D) : 88dB, DR, S/N : 91dB (LINE input)

3. Playback Function

•

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

•

Digital Volume (0dB

∼

-127dB, 0.5dB Step, Mute)

•

Stereo Headphone-Amp

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

- Output Power : 15mW@16Ω (HVDD=3.3V)

- Click Noise Free at Power ON/OFF

•

Mono Speaker-Amp with ALC

- S/(N+D) : 64dB@150mW, S/N : 90dB

- BTL Output

- Output Power : 400mW@8Ω (BEEP Input, HVDD=3.3V)

300mW@8Ω (MIN Input, ALC2=OFF, HVDD=3.3V)

•

Mono and Stereo Beep Inputs

•

Mono Line Output

- Differential Output

- Performance : S/(N+D) : 89dB, S/N : 95dB

•

Stereo Line Output

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

4. Power Management

5. Master Clock

(1) PLL Mode

•

Frequencies : 11.2896MHz, 12MHz and 12.288MHz

•

Input Level : CMOS

(2) External Clock Mode

•

Frequencies : 2.048MHz

∼

12.288MHz

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

7. Sampling Rate :

(1) PLL mode

•

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

(2) External Clock mode

•

8kHz

∼

48kHz

8. Control mode: 4-wire Serial / I

2

C Bus

9. Master/Slave mode

MS0202-E-04

-1-

2005/04