ASAHI KASEI AKM CONFIDENTIAL [AK4340]
Rev.0.6 2005/11
- 1 -





GENERAL DESCRIPTION
The AK4340 offers the ideal features for consumer systems that require a 2Vrms audio output. Using
AKM's multi bit architecture for its modulator the AK4340 delivers a wide dynamic range while preserving
linearity for improved THD+N performance. The AK4340 integrates the Switched Capacitor Filter (SCF)
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 applications including Set-top-box, DVD-Audio. The
AK4340 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
† On chip Buffer with 2Vrms Single-ended output
† Digital De-emphasis Filter: 32kHz, 44.1kHz or 48kHz
† Soft Mute Function
† Digital Attenuator (Linear 256 Step)
† Audio interface format: 24Bit MSB justified, 24/20/16 LSB justified or
I
2
S compatible
† Master clock: 256fs, 384fs, 512fs, 768fs or 1152fs (Normal Speed Mode)
128fs, 192fs, 256fs or 512fs (Double Speed Mode)
128fs or 192fs (Quad Speed Mode)
† THD+N: -90dB
† Dynamic Range: 106dB
† Power supply: +4.5V to +5.5V (DAC), - 4.5V to - 13.2V (Output Buffer)
† Ta = - 20 to 85 °C
† Package: 16pin TSSOP (6.4mm x 5.0mm)

192kHz 24-Bit Stereo ∆Σ DAC with 2Vrms Output
AK4340
= Preliminary =
LRCK
BICK
SDTI
Audio
Data
Interface
MCLK
PDN
∆Σ
Modulator
AOUTL
8X
Interpolator
SCF
LPF
AOUTR
VDD
VSS
De-emphasis
Control
P/S
µP
Interface
Clock
Divider
SMUTE/CSN
ACKS/CCLK
DIF0/CDTI
∆Σ
Modulator
8X
Interpolator
HVEE
SCF
LPF
ATT
ATT
GAIN