Harman Kardon AVR 254, Service Manual

Page: 161 / 189

GENERAL DESCRIPTION
The AK4384 offers the perfect mix for cost and performance based audio systems. Using AKM's multi bit
architecture for its modulator the AK4384 delivers a wide dynamic range while preserving linearity for
improved THD+N performance. The AK4384 integrates a combination of SCF and CTF 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 applications including DVD-Audio. The AK4384 is offered in a
space saving 16pin TSSOP package.
FEATURES
o
Sampling Rate Ranging from 8kHz to 192kHz
o
128 times Oversampling (Normal Speed Mode)
o
64 times Oversampling (Double Speed Mode)
o
32 times Oversampling (Quad Speed Mode)
o
24-Bit 8 times FIR Digital Filter
o
SCF with High Tolerance to Clock Jitter
o
2nd order Analog LPF
o
Single Ended Output Buffer
o
Digital de-emphasis for 32k, 44.1k and 48kHz sampling
o
Soft mute
o
Digital Attenuator (Linear 256 steps)
o
I/F format: 24-Bit MSB justified, 24/20/16-Bit LSB justified or I
2
S
o
Master clock: 256fs, 384fs, 512fs, 768fs or 1152fs (Normal Speed Mode)
128fs, 192fs, 256fs or 384fs (Double Speed Mode)
128fs, 192fs (Quad Speed Mode)
o
THD+N: -94dB
o
Dynamic Range: 106dB
o
Power supply: 4.5 to 5.5V
o
Very Small Package: 16pin TSSOP (6.4mm x 5.0mm)
LRCK
BICK
SDTI
Audio
Data
Interface
MCLK
PDN
∆Σ
Modulator
AOUTL
8X
Interpolator
SCF
LPF
AOUTR
VDD
VSS
VCOM
De-emphasis
Control
P/S
µP
Interface
Clock
Divider
SMUTE/CSN
ACKS/CCLK
DIF0/CDTI
∆Σ
Modulator
8X
Interpolator
DZFR
DZFL
SCF
LPF
ATT
ATT
106dB 192kHz 24-Bit 2ch ∆Σ DAC
AK4384
161
AVR254
harman/kardon