ASAHI KASEI [AK5385B]
MS0406-E-00 2005/08
- 1 -





GENERAL DESCRIPTION
The AK5385B is a 24bit, 192kHz sampling 2ch A/D converter for high-end audio system. The modulator in
the AK5385B uses the Enhanced Dual Bit architecture and the AK5385B realizes high accuracy and low
cost. The AK5385B performs 114dB dynamic range, so the device is suitable for AV-amp, AV recorder
and musical instruments. The AK5385B is available in 28pin VSOP and SOP package, utilizing less board
space.


FEATURES
‡ Sampling Rate: 8kHz ~ 216kHz
‡ Full Differential Inputs
‡ S/(N+D): 103dB
‡ DR: 114dB
‡ S/N: 114dB
‡ High Performance Linear Phase Digital Anti-Alias filter
• Passband: 0~21.768kHz (@fs=48kHz)
• Ripple: 0.005dB
• Stopband: 100dB
‡ Digital HPF
‡ Power Supply: 5V ± 5%(Analog), 3.0 ~ 5.25V(Digital)
‡ Power Dissipation: 183mW (@fs=48kHz)
‡ Package: 28pin SOP / 28pin VSOP
‡ AK5383/AK5393/AK5394A Semi-Pin compatible

TEST
Decimation
Filter
Delta-Sigma
Modulator
Decimation
Filter
HPF
HPF
Audio I/F
Controller
DVDDAVDD DVSSAVSS
VREFR
VREFL
LIN+
LIN-
Delta-Sigma
Modulator
RIN+
RIN-
DIF
PDN
LRCK
BICK
MCLK
SDTO
HPFE
M/S DFS1 DFS0 CKS1 CKS0VCOM
BVSS
OVF

Block diagram


24Bit 192kHz ∆Σ ADC
AK5385B