[AK4424]

MS0935-E-03

2010/09

- 1 -

GENERAL DESCRIPTION

The AK4424 is a 5V 24-bit stereo DAC with an integrated 2Vrms output buffer. A charge pump in the

buffer develops an internal negative power supply rail that enables a ground-referenced 2Vrms output.

Using AKM’s multi bit modulator architecture, the AK4424 delivers a wide dynamic range while preserving

linearity for improved THD+N performance. The AK4424 integrates a combination of switched-capacitor

and continuous-time filters, increasing performance for systems with excessive clock jitter. The 24-bit

word length and 192kHz sampling rate make this part ideal for a wide range of consumer audio

applications, such as DVD, AV receiver system and set-top boxes. The AK4424 is offered in a space

saving 16pin TSSOP package.

FEATURES

Sampling Rate Ranging from 8kHz to 192kHz

128 times Oversampling (Normal Speed Mode)

64 times Oversampling (Double Speed Mode)

32 times Oversampling (Quad Speed Mode)

24-Bit 8 times FIR Digital Filter

Switched-Capacitor Filter with High Tolerance to Clock Jitter

Single Ended 2Vrms Output Buffer

Digital de-emphasis

Soft mute

I/F format: I

Master clock: 512fs, 768fs or 1152fs (Normal Speed Mode)

256fs or 384fs (Double Speed Mode)

128fs, 192fs (Quad Speed Mode)

THD+N: -92dB

Dynamic Range: 105dB

Automatic Power-on Reset Circuit

Power supply: +4.5

∼ +5.5V

Ta = -20 to 85

°C

Small Package: 16pin TSSOP (6.4mm x 5.0mm)

192kHz 24-Bit Stereo

ΔΣ DAC with 2Vrms Output

AK4424

DEM

LRCK

BICK

SDTI

Audio

Data

Interface

ΔΣ

Modulator

AOUTL

8X

Interpolator

SCF

LPF

AOUTR

VDD

VSS1

Control

Interface

Clock

Divider

ΔΣ

Modulator

8X

Interpolator

SCF

LPF

Charge

Pump

CP

CN

VEE

VSS2

CVDD

1μ

1μ

DZF

SMUTE

De-emphasis

Control

MCLK