AK4665AEN 参数 Datasheet PDF下载

ASAHI KASEI

[AK4665A]

-

AK4665A

20-Bit Stereo CODEC with MIC/HP-AMP

GENERAL DESCRIPTION

The AK4665A is a 20bit CODEC with built-in Input PGA and Headphone Amplifier. The AK4665A

includes a microphone/line input selector and an ALC circuit for input, and a stereo line output buffer,

analog volume controls and capless stereo headphone amplifier for output. The AK4665A also features

an analog mixing circuit that allows easy interfacing in mobile phone and portable communication

designs. The integrated headphone amplifier features “pop-free” power-on/off, a mute control and

delivers 31mW of power into 16Ω load. The AK4665A is housed in a 32pin QFN package, making it

suitable for portable applications.

FEATURE

2ch 20bit ADC

- Mono MIC-Amp: +30dB/+6dB/0dB/−6dB

- Single-ended Input

- Input Selector

- Digital ALC: +41.25dB

∼ −54dB,

0.375dB Step, Mute

- Digital HPF for DC-offset cancellation

- I/F format: 20bit MSB justified, I

2

S

- S/N: 93dB

2ch 20bit DAC

- Digital ATT: 0dB

∼ −127dB,

Mute, 0.5dB step (soft transition)

- Soft Mute

- Digital De-emphasis Filter: 32kHz, 44.1kHz and 48kHz

- Bass Boost

- I/F Format: I

2

S, 20bit MSB justified, 20bit/16bit LSB justified

Sampling Rate: 8kHz

∼

48kHz

System clock: 256fs/512fs

Analog Mixing Circuit

Stereo Lineout

- ALC: +19.5dB

∼ −12dB,

0.5dB step

- Analog Volume: 0dB

∼ −30dB,

Mute, 2dB step

Capless Stereo Headphone Amplifier

- Output Power: 31mW x 2ch @16Ω

- Line output mode: 1Vrms @10kΩ

- Charge pump circuit for negative power supply

- S/N: 88dB

µP Interface: 3-wire

Power Management

Power Supply:

- AVDD, DVDD, HVDD: 2.6V

∼

3.6V

- TVDD (Digital I/O): 1.6V

∼

3.6V

Power Supply Current: 20mA

Ta:

−30 ∼

85°C

Small Package: 32pin QFN (5mm x 5mm, 0.5mm pitch)

MS0440-E-01

-1-

2006/05